{ "dataset": "outgassing", "schemaVersion": 2, "version": "2026-09-07", "updated": "2026-09-07", "license": "CC BY 4.0", "attribution": "Mean Free Path, Pierre F. Ribault", "canonical": "https://pierreribault.com/data/outgassing.json", "data": { "version": "2.0.0", "changelog": "v2: as_printed (the value as the source prints it) becomes the stored datum; the canonical mbar rate is derived at build by the exact unit constants, 101325/76000 for the torr, and serialised to six significant figures.", "statut_global": "candidate", "note": "Outgassing base. Every value carries its source key and its conditions. An absence is a stated declaration with a reason, never a hole. No entry is validated: the corpus is candidate throughout, and provenance lives per value rather than per card. Where a source publishes a fitted law rather than a rate, the law is carried with the validity range the source states, and it is never evaluated outside it.", "canonicalUnit": "mbar·L/s/cm²", "canonicalUnitField": "q_mbar_l_s_cm2", "sourceRegistry": { "S-CHIGGIATO-CAS-2017": "P. Chiggiato, Outgassing properties of vacuum materials for particle accelerators, CAS Glumslov 2017, arXiv:2006.07124", "S-FEDCHAK-2021": "J.A. Fedchak, J.K. Scherschligt, S. Avdiaj, D.S. Barker, S.P. Eckel, B. Bowers, S. O'Connell, P. Henderson, Outgassing rate comparison of seven geometrically similar vacuum chambers of different materials and heat treatments, J. Vac. Sci. Technol. A, DOI 10.1116/6.0000657, arXiv:2009.10560", "S-ITER-ITR-19-004": "ITR-19-004, ITER Vacuum Handbook, R. Pearce and L. Worth, 19 November 2019, ITER Organization, licensed CC BY-NC-ND 3.0 IGO, https://www.iter.org/sites/default/files/media/2024-04/iter_vacuum_handbook.pdf", "S-LIGO-E1000088-V1": "LIGO-E1000088-v1, Qualifying Parts for LIGO UHV Service, D. Coyne, 19 March 2010, https://dcc.ligo.org/public/0010/E1000088/001/E1000088-v1%20Qualifying%20parts%20for%20LIGO%20UHV%20Service.pdf", "S-LIGO-E080177-V2": "LIGO-E080177-v2, RGA Test Qualification of components for the LIGO UHV, https://dcc.ligo.org/public/0008/E080177/002/E080177-v2%20RGA%20test%20qualification.pdf", "S-LIGO-E960050-V13": "LIGO-E960050-v13, LIGO Vacuum Compatible Materials List, D. Coyne (ed.), 4 June 2014, Table 1 Approved Construction Materials, https://dcc.ligo.org/public/0003/E960050/013/E960050-v13%20Vacuum%20Compatible%20Materials%20List.pdf", "S-BENVENUTI-EPAC1998": "C. Benvenuti, Non-evaporable getters: from pumping strips to thin film coatings, 6th European Particle Accelerator Conference EPAC 1998, Stockholm, pp. 200-204, https://accelconf.web.cern.ch/e98/PAPERS/THZ02A.PDF", "S-LIGO-E960022-V24": "LIGO-E960022-v24, LIGO Vacuum Compatibility, Cleaning Methods and Qualification Procedures, B. Bland, D. Coyne and J. Fauver (eds.), 27 June 2012, https://dcc.ligo.org/public/0003/E960022/024/E960022-v24.pdf", "S-ELSEY-1975-II": "R. J. Elsey, Outgassing of vacuum materials II, Vacuum 25(8) (1975) 347-361, Pergamon Press, The Rutherford Laboratory, Chilton, England. No DOI is printed on the document.", "S-ELSEY-1975-I": "R. J. Elsey, Outgassing of vacuum materials I, Vacuum 25(7) (1975) 299-306, Pergamon Press, The Rutherford Laboratory, Chilton, England. No DOI is printed on the document.", "S-BENVENUTI-TIZRV-2001": "C. Benvenuti, P. Chiggiato, P. Costa Pinto, A. Escudeiro Santana, T. Hedley, A. Mongelluzzo, V. Ruzinov, I. Wevers, Vacuum properties of TiZrV non-evaporable getter films, Vacuum 60 (2001) 57-65, EST/SM CERN, DOI 10.1016/S0042-207X(00)00246-3", "S-LI-DYLLA-1993": "Minxu Li and H. F. Dylla, Model for the outgassing of water from metal surfaces, J. Vac. Sci. Technol. A 11(4) (1993) 1702-1707, College of William and Mary and CEBAF, DOI 10.1116/1.578482", "S-SEMENOV-IPAC2021": "A. M. Semenov, A. V. Burdakov, A. A. Krasnov, A. A. Shoshin, B. P. Tolochko, A. V. Varand, M. A. Mikhailenko, S. R. Ivanova, The thermal outgassing rate of materials used in vacuum systems, Proc. 12th International Particle Accelerator Conference IPAC2021, Campinas SP Brazil, JACoW Publishing, paper TUPAB396, pp. 2447-2449, ISBN 978-3-95450-214-1, ISSN 2673-5490, doi:10.18429/JACoW-IPAC2021-TUPAB396. Published under the CC BY 3.0 licence.", "S-SEFA-2017": "M. Sefa, J. A. Fedchak, J. Scherschligt, Investigations of medium-temperature heat treatments to achieve low outgassing rates in stainless steel ultrahigh vacuum chambers, Journal of Vacuum Science and Technology A 35, 041601 (2017), doi:10.1116/1.4983211, National Institute of Standards and Technology.", "S-NASA-CR-2101": "D. K. Benson and G. A. Beitel, Development and evaluation of vacuum pressure gauge components from carbon and graphite, NASA CR-2101, Midwest Research Institute report C-2922, contract NAS 1-10738, prepared for Langley Research Center, National Aeronautics and Space Administration, September 1972.", "S-BACHER-2003": "J.-P. Bacher, C. Benvenuti, P. Chiggiato, M.-P. Reinert, S. Sgobba, A.-M. Brass, Thermal desorption study of selected austenitic stainless steels, Journal of Vacuum Science and Technology A 21(1), 167-174 (2003), doi:10.1116/1.1527953. Presented at the IUVSTA 15th International Vacuum Congress, San Francisco, 28 October to 2 November 2001.", "S-CERN-THESIS-2019-061": "A. K. Riihimaki, Outgassing studies of some accelerator materials, Master thesis, University of Helsinki, Department of Physics, 18 June 2019, CERN-THESIS-2019-061, supervisor C. Yin Vallgren, examiners J. Raisanen and P. Tikkanen.", "S-FEDCHAK-FURNACE-2018": "J. A. Fedchak, J. Scherschligt, D. Barker, S. Eckel, A. P. Farrell, M. Sefa, Vacuum furnace for degassing stainless-steel vacuum components, National Institute of Standards and Technology, Gaithersburg MD 20899. The document held in the library carries no journal, volume or DOI line, and the citation records what the document itself prints." }, "entries": [ { "id": "og-ss-h2o-unbaked-cas", "slug": "stainless-316ln", "grade": null, "material_verbatim": "unbaked austenitic stainless steel", "class": "rate", "species": "H2O", "state": "unbaked", "treatment": "state-of-art cleaning", "bake": null, "measurement": { "method": "throughput", "temp_C": 23, "pumping_time_h": "curve-abscissa" }, "curve": { "points": [ { "t_h": 10, "as_printed": { "value": "3e-10", "unit_printed": "mbar·ℓ/s·cm²", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 3e-10 }, { "t_h": 100, "as_printed": { "value": "3e-11", "unit_printed": "mbar·ℓ/s·cm²", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 3e-11 } ], "troncons": [ { "t_h_min": 10, "t_h_max": 100, "_source": "S-CHIGGIATO-CAS-2017" } ] }, "conditions": "Table 3, measured at room temperature. The 10 h row is credited in Table 3 to Benvenuti, Extreme Vacua, Physica Scripta T22 (1988). CERN design rule for all metal alloys, Eq. 13 of the source: qH2O of about 3e-9 divided by t in hours, mbar l per s per cm2. The source states that without the pumping time any value of qH2O is meaningless.", "contradictions": [] }, { "id": "og-ss-h2-baked-150-cas", "slug": "stainless-316ln", "grade": null, "material_verbatim": "austenitic stainless steel", "class": "rate", "species": "H2", "state": "baked", "treatment": "state-of-art cleaning", "bake": { "temp_C": 150, "hours": 24, "_source": "S-CHIGGIATO-CAS-2017" }, "measurement": { "method": "throughput", "temp_C": 23, "pumping_time_h": "not-applicable" }, "value": { "_source": "S-CHIGGIATO-CAS-2017", "as_printed": { "value": "3e-12", "unit_printed": "mbar ℓ s-1 cm-2", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 3e-12 }, "conditions": "Tables 3 and 4. Pumping time marked N.A. by the source: hydrogen outgassing rate does not depend on the duration of pumping. Measured at CERN by Ivo Wevers, Geraldine Chuste and the author.", "contradictions": [] }, { "id": "og-ss-h2-baked-200-cas", "slug": "stainless-316ln", "grade": null, "material_verbatim": "austenitic stainless steel", "class": "rate", "species": "H2", "state": "baked", "treatment": "state-of-art cleaning", "bake": { "temp_C": 200, "hours": 24, "_source": "S-CHIGGIATO-CAS-2017" }, "measurement": { "method": "throughput", "temp_C": 23, "pumping_time_h": "not-applicable" }, "value": { "_source": "S-CHIGGIATO-CAS-2017", "as_printed": { "value": "2e-12", "unit_printed": "mbar ℓ s-1 cm-2", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 2e-12 }, "conditions": "Table 4, bakeout for 24 h. Measured at CERN by Ivo Wevers, Geraldine Chuste and the author.", "contradictions": [] }, { "id": "og-ss-h2-baked-300-cas", "slug": "stainless-316ln", "grade": null, "material_verbatim": "austenitic stainless steel", "class": "rate", "species": "H2", "state": "baked", "treatment": "state-of-art cleaning", "bake": { "temp_C": 300, "hours": 24, "_source": "S-CHIGGIATO-CAS-2017" }, "measurement": { "method": "throughput", "temp_C": 23, "pumping_time_h": "not-applicable" }, "value": { "_source": "S-CHIGGIATO-CAS-2017", "as_printed": { "value": "5e-13", "unit_printed": "mbar ℓ s-1 cm-2", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 5e-13 }, "conditions": "Table 4, bakeout for 24 h. Measured at CERN by Ivo Wevers, Geraldine Chuste and the author.", "contradictions": [], "diffusion": { "D0_cm2_s": 0.0047, "Ea_eV": 0.56, "_source": "S-CHIGGIATO-CAS-2017", "note": "Typical diffusion coefficient of H in austenitic stainless steel, Eq. 56 of the source, credited by it to Louthan and Derrick, Corrosion Science 15 (1975) 565-577. Fig. 21 of the source gives about 0.5 eV from a 316LN chamber, 2 m long, 3.4 cm diameter, 2 mm thick, after bakeout at 200 C for 20 h." } }, { "id": "og-ss-h2-vacfired-cern-cas", "slug": "stainless-316ln", "grade": null, "material_verbatim": "austenitic stainless steels, vacuum fired", "class": "rate", "species": "H2", "state": "vacuum_fired", "treatment": "vacuum firing 950 C for 2 h in a vacuum better than 1e-5 mbar (CERN standard)", "bake": null, "measurement": { "method": "throughput", "temp_C": 23, "pumping_time_h": "not-applicable" }, "value": { "_source": "S-CHIGGIATO-CAS-2017", "as_printed": { "value": "1e-15", "unit_printed": "mbar ℓ s-1 cm-2", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 1e-15 }, "conditions": "Order of magnitude stated by the source for vacuum chambers with up to a few mm thick walls. Fig. 24 of the source reports measured values lower than 1e-14 for a vacuum fired 316LN chamber, 2 m long, 2 mm thick, after bakeout at 200 C for 20 h.", "contradictions": [] }, { "id": "og-ss-h2-airbake-virgo-cas", "slug": "stainless-316ln", "grade": null, "material_verbatim": "304L stainless steel, 2 mm thick, corrugated walls (VIRGO arm modules)", "class": "rate", "species": "H2", "state": "baked", "treatment": "air bakeout at 400 C for 38 hours in a furnace, ex situ", "bake": { "temp_C": 150, "hours": null, "_source": "S-CHIGGIATO-CAS-2017" }, "measurement": { "method": "throughput", "temp_C": 23, "pumping_time_h": "not-applicable" }, "value": { "_source": "S-CHIGGIATO-CAS-2017", "as_printed": { "value": "1e-15", "unit_printed": "mbar ℓ s-1 cm-2", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 1e-15 }, "conditions": "Section 5.3 of the source: after in situ bakeout at 150 C for several days, outgassing rates in the low 1e-15 range were reproducibly measured. Underlying references named by the source: Bernardini et al., JVST A 16, 188-193 (1998) and Brisson et al., Vacuum 60, 9-14 (2001). In situ bake duration given as several days, no number published.", "contradictions": [] }, { "id": "og-ss-h2-304l-fedchak", "slug": "stainless-316ln", "grade": null, "material_verbatim": "304L stainless steel, no heat treatment", "class": "rate", "species": "H2", "state": "baked", "treatment": "UHV cleaning, aqueous ultrasonic rinse then acetone wipe (Anderson-Dahlen)", "bake": { "temp_C": 137, "hours": 72, "_source": "S-FEDCHAK-2021" }, "measurement": { "method": "accumulation", "temp_C": 25, "pumping_time_h": "not-applicable" }, "value": { "_source": "S-FEDCHAK-2021", "as_printed": { "value": "9.4e-10", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 9.4e-12 }, "conditions": "Table IV, published as 9.4e-10 Pa L/s/cm2 at 298.15 K, converted at build by the exact definition of the units. Rate-of-rise with spinning rotor gauge, SI traceable. Bake stated as 125 to 150 C for a minimum of 72 h, midpoint written here, range verbatim. Activation energy ED 0.59 eV. Uncertainty 24 percent, k equals 2. Chamber 3 mm walls, composition from supplier certificates in Table I.", "contradictions": [] }, { "id": "og-ss-h2-316l-fedchak", "slug": "stainless-316ln", "grade": null, "material_verbatim": "316L stainless steel, no heat treatment", "class": "rate", "species": "H2", "state": "baked", "treatment": "UHV cleaning, aqueous ultrasonic rinse then acetone wipe (Anderson-Dahlen)", "bake": { "temp_C": 137, "hours": 72, "_source": "S-FEDCHAK-2021" }, "measurement": { "method": "accumulation", "temp_C": 25, "pumping_time_h": "not-applicable" }, "value": { "_source": "S-FEDCHAK-2021", "as_printed": { "value": "6.5e-10", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 6.5e-12 }, "conditions": "Table IV, published as 6.5e-10 Pa L/s/cm2 at 298.15 K, converted at build by the exact definition of the units. Bake range 125 to 150 C for at least 72 h. ED 0.66 eV. Uncertainty 24 percent.", "contradictions": [] }, { "id": "og-ss-h2-316ln-fedchak", "slug": "stainless-316ln", "grade": null, "material_verbatim": "316LN electroslag re-melt stainless steel, no heat treatment", "class": "rate", "species": "H2", "state": "baked", "treatment": "UHV cleaning, aqueous ultrasonic rinse then acetone wipe (Anderson-Dahlen)", "bake": { "temp_C": 137, "hours": 72, "_source": "S-FEDCHAK-2021" }, "measurement": { "method": "accumulation", "temp_C": 25, "pumping_time_h": "not-applicable" }, "value": { "_source": "S-FEDCHAK-2021", "as_printed": { "value": "7.0e-10", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 7e-12 }, "conditions": "Table IV, published as 7.0e-10 Pa L/s/cm2 at 298.15 K, converted at build by the exact definition of the units. ED 0.64 eV. Uncertainty 24 percent. The source concludes no improvement of 316LN ESR over 316L without heat treatment.", "contradictions": [] }, { "id": "og-ss-h2-316l-xhv-fedchak", "slug": "stainless-316ln", "grade": null, "material_verbatim": "316L stainless steel, vacuum fired 950 C for at least 24 hours", "class": "rate", "species": "H2", "state": "vacuum_fired", "treatment": "vacuum fired at about 950 C for a minimum of 24 h below 1e-2 Pa, on raw material before fabrication", "bake": { "temp_C": 137, "hours": 72, "_source": "S-FEDCHAK-2021" }, "measurement": { "method": "accumulation", "temp_C": 25, "pumping_time_h": "not-applicable" }, "value": { "_source": "S-FEDCHAK-2021", "as_printed": { "value": "5.1e-12", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 5.1e-14 }, "conditions": "Table IV, published as 5.1e-12 Pa L/s/cm2 at 298.15 K, converted at build by the exact definition of the units. ED 0.68 eV. Uncertainty 72 percent for rates below 1e-11 Pa L/s/cm2, reproducibility dominated.", "contradictions": [] }, { "id": "og-ss-h2-316ln-xhv-fedchak", "slug": "stainless-316ln", "grade": null, "material_verbatim": "316LN electroslag re-melt stainless steel, vacuum fired 950 C for at least 24 hours", "class": "rate", "species": "H2", "state": "vacuum_fired", "treatment": "vacuum fired at about 950 C for a minimum of 24 h below 1e-2 Pa, on raw material before fabrication", "bake": { "temp_C": 137, "hours": 72, "_source": "S-FEDCHAK-2021" }, "measurement": { "method": "accumulation", "temp_C": 25, "pumping_time_h": "not-applicable" }, "value": { "_source": "S-FEDCHAK-2021", "as_printed": { "value": "9.9e-12", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 9.9e-14 }, "conditions": "Table IV, published as 9.9e-12 Pa L/s/cm2 at 298.15 K, converted at build by the exact definition of the units. ED 0.53 eV. Uncertainty 72 percent.", "contradictions": [] }, { "id": "og-ss-h2o-304l-fedchak", "slug": "stainless-316ln", "grade": null, "material_verbatim": "304L stainless steel, no heat treatment", "class": "rate", "species": "H2O", "state": "unbaked", "treatment": "UHV cleaning, aqueous ultrasonic rinse then acetone wipe (Anderson-Dahlen)", "bake": null, "measurement": { "method": "throughput", "temp_C": 25, "pumping_time_h": "curve-abscissa" }, "curve": { "points": [ { "t_h": 0.556, "as_printed": { "value": "2.4e-6", "unit_printed": "Pa L/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 2.4e-8 }, { "t_h": 2.778, "as_printed": { "value": "2.7e-7", "unit_printed": "Pa L/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 2.7e-9 }, { "t_h": 27.778, "as_printed": { "value": "1.2e-8", "unit_printed": "Pa L/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 1.2e-10 } ], "troncons": [ { "t_h_min": 0.556, "t_h_max": 27.778, "_source": "S-FEDCHAK-2021" } ] }, "conditions": "Table III, published in Pa L/s/cm2 at 2e3, 1e4 and 1e5 s, converted at build by the exact definition of the units, times converted to hours. Power law fit alpha 1.3. Uncertainty 33 percent. Assumes all outgassing products are H2O. Chamber exposed to atmosphere at least several days before pumpdown.", "contradictions": [] }, { "id": "og-ss-h2o-316l-fedchak", "slug": "stainless-316ln", "grade": null, "material_verbatim": "316L stainless steel, no heat treatment", "class": "rate", "species": "H2O", "state": "unbaked", "treatment": "UHV cleaning, aqueous ultrasonic rinse then acetone wipe (Anderson-Dahlen)", "bake": null, "measurement": { "method": "throughput", "temp_C": 25, "pumping_time_h": "curve-abscissa" }, "curve": { "points": [ { "t_h": 0.556, "as_printed": { "value": "2.8e-7", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 2.8e-9 }, { "t_h": 2.778, "as_printed": { "value": "6.6e-8", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 6.6e-10 }, { "t_h": 27.778, "as_printed": { "value": "8.5e-9", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 8.5e-11 } ], "troncons": [ { "t_h_min": 0.556, "t_h_max": 27.778, "_source": "S-FEDCHAK-2021" } ] }, "conditions": "Table III run 316L no. 1, converted at build by the exact definition of the units. Alpha 0.89. A repeat run more than one year later gave 4.1e-9, 7.7e-10 and 6.9e-11 at the same three times. Uncertainty 33 percent.", "contradictions": [] }, { "id": "og-ss-h2o-316ln-fedchak", "slug": "stainless-316ln", "grade": null, "material_verbatim": "316LN electroslag re-melt stainless steel, no heat treatment", "class": "rate", "species": "H2O", "state": "unbaked", "treatment": "UHV cleaning, aqueous ultrasonic rinse then acetone wipe (Anderson-Dahlen)", "bake": null, "measurement": { "method": "throughput", "temp_C": 25, "pumping_time_h": "curve-abscissa" }, "curve": { "points": [ { "t_h": 0.556, "as_printed": { "value": "5.2e-7", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 5.2e-9 }, { "t_h": 2.778, "as_printed": { "value": "7.8e-8", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 7.8e-10 }, { "t_h": 27.778, "as_printed": { "value": "5.2e-9", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 5.2e-11 } ], "troncons": [ { "t_h_min": 0.556, "t_h_max": 27.778, "_source": "S-FEDCHAK-2021" } ] }, "conditions": "Table III, converted at build by the exact definition of the units. Alpha 1.2. Uncertainty 33 percent. The source notes 316LN and 316LN-XHV hold their improvement over 304L across the whole pumpdown.", "contradictions": [] }, { "id": "og-ss-h2o-316l-xhv-fedchak", "slug": "stainless-316ln", "grade": null, "material_verbatim": "316L stainless steel, vacuum fired", "class": "rate", "species": "H2O", "state": "unbaked", "treatment": "vacuum fired 950 C at least 24 h, then UHV cleaned, no in situ bake before this pumpdown", "bake": null, "measurement": { "method": "throughput", "temp_C": 25, "pumping_time_h": "curve-abscissa" }, "curve": { "points": [ { "t_h": 0.556, "as_printed": { "value": "2e-7", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 2e-9 }, { "t_h": 2.778, "as_printed": { "value": "5.2e-8", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 5.2e-10 }, { "t_h": 27.778, "as_printed": { "value": "7.7e-9", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 7.7e-11 } ], "troncons": [ { "t_h_min": 0.556, "t_h_max": 27.778, "_source": "S-FEDCHAK-2021" } ] }, "conditions": "Table III run 316L-XHV no. 1, converted at build by the exact definition of the units. Alpha 0.83. The source states vacuum firing does not significantly affect water outgassing. Repeat run about nine months later: 2.6e-9, 5.3e-10 and 5.4e-11.", "contradictions": [] }, { "id": "og-ss-h2o-316ln-xhv-fedchak", "slug": "stainless-316ln", "grade": null, "material_verbatim": "316LN electroslag re-melt stainless steel, vacuum fired", "class": "rate", "species": "H2O", "state": "unbaked", "treatment": "vacuum fired 950 C at least 24 h, then UHV cleaned, no in situ bake before this pumpdown", "bake": null, "measurement": { "method": "throughput", "temp_C": 25, "pumping_time_h": "curve-abscissa" }, "curve": { "points": [ { "t_h": 0.556, "as_printed": { "value": "4.2e-7", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 4.2e-9 }, { "t_h": 2.778, "as_printed": { "value": "5.4e-8", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 5.4e-10 }, { "t_h": 27.778, "as_printed": { "value": "2.8e-9", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 2.8e-11 } ], "troncons": [ { "t_h_min": 0.556, "t_h_max": 27.778, "_source": "S-FEDCHAK-2021" } ] }, "conditions": "Table III, converted at build by the exact definition of the units. Alpha 1.3. Uncertainty 33 percent.", "contradictions": [] }, { "id": "og-cu-h2-baked-200-t3-cas", "slug": "copper-ofe", "grade": null, "material_verbatim": "OFS copper (oxygen-free silver-bearing)", "class": "rate", "species": "H2", "state": "baked", "treatment": "state-of-art cleaning", "bake": { "temp_C": 200, "hours": 24, "_source": "S-CHIGGIATO-CAS-2017" }, "measurement": { "method": "throughput", "temp_C": 23, "pumping_time_h": "not-applicable" }, "value": { "_source": "S-CHIGGIATO-CAS-2017", "as_printed": { "value": "3e-14", "unit_printed": "mbar·ℓ/s·cm²", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 3e-14 }, "conditions": "Table 3, measured at room temperature, pumping time marked N.A. by the source. Measured at CERN by Ivo Wevers, Geraldine Chuste and the author. The material is silver-bearing oxygen-free copper, not plain OFE.", "contradictions": [ { "against": "og-cu-h2-baked-200-t4-cas", "values": [ { "q_mbar_l_s_cm2": 3e-14, "_source": "S-CHIGGIATO-CAS-2017", "where": "Table 3" }, { "q_mbar_l_s_cm2": 1e-14, "bound": "approx", "_source": "S-CHIGGIATO-CAS-2017", "where": "Table 4" } ], "retenue": null, "note": "The same document publishes two values for OFS copper after a 200 C bakeout of 24 h, a factor of three apart, in two tables sourced to the same CERN measurements. Neither is retracted by the source. Both are served, no arbitration." } ] }, { "id": "og-cu-h2-baked-200-t4-cas", "slug": "copper-ofe", "grade": null, "material_verbatim": "Copper Silver added (OFS)", "class": "rate", "species": "H2", "state": "baked", "treatment": "state-of-art cleaning", "bake": { "temp_C": 200, "hours": 24, "_source": "S-CHIGGIATO-CAS-2017" }, "measurement": { "method": "throughput", "temp_C": 23, "pumping_time_h": "not-applicable" }, "value": { "bound": "approx", "_source": "S-CHIGGIATO-CAS-2017", "as_printed": { "value": "1e-14", "unit_printed": "mbar ℓ s-1 cm-2", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 1e-14 }, "conditions": "Table 4, typical H2 outgassing rates after bakeout of metals used in particle accelerators, bakeout T for 24 h. Published as approximately 1e-14. Measured at CERN by Ivo Wevers, Geraldine Chuste and the author.", "contradictions": [ { "against": "og-cu-h2-baked-200-t3-cas", "values": [ { "q_mbar_l_s_cm2": 1e-14, "bound": "approx", "_source": "S-CHIGGIATO-CAS-2017", "where": "Table 4" }, { "q_mbar_l_s_cm2": 3e-14, "_source": "S-CHIGGIATO-CAS-2017", "where": "Table 3" } ], "retenue": null, "note": "See og-cu-h2-baked-200-t3-cas. Same document, same material, same bakeout, two values." } ] }, { "id": "og-cu-h2-baked-150-cas", "slug": "copper-ofe", "grade": null, "material_verbatim": "Copper Silver added (OFS)", "class": "rate", "species": "H2", "state": "baked", "treatment": "state-of-art cleaning", "bake": { "temp_C": 150, "hours": 24, "_source": "S-CHIGGIATO-CAS-2017" }, "measurement": { "method": "throughput", "temp_C": 23, "pumping_time_h": "not-applicable" }, "value": { "_source": "S-CHIGGIATO-CAS-2017", "as_printed": { "value": "3e-12", "unit_printed": "mbar ℓ s-1 cm-2", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 3e-12 }, "conditions": "Table 4, bakeout for 24 h. Same value as austenitic stainless steel at the same bakeout temperature in the same table: the advantage of copper appears only at 200 C. Measured at CERN by Ivo Wevers, Geraldine Chuste and the author.", "diffusion": { "D0_cm2_s": 0.00834, "Ea_eV": 0.39, "_source": "S-CHIGGIATO-CAS-2017", "note": "Eq. 61 of the source, diffusion coefficient of H in copper. Fig. 22 gives about 0.4 eV measured on an OFS copper chamber, 7 m long, 8 cm diameter, 2 mm thick, after bakeout at 200 C for 20 h, at CERN by Geraldine Chuste and the author." }, "contradictions": [] }, { "id": "og-cu-h2-baked-range-cas", "slug": "copper-ofe", "grade": null, "material_verbatim": "copper and aluminium alloys", "class": "rate", "species": "H2", "state": "baked", "treatment": "state-of-art cleaning", "bake": { "temp_C": 175, "hours": 24, "_source": "S-CHIGGIATO-CAS-2017" }, "measurement": { "method": "stated", "temp_C": 23, "pumping_time_h": "not-applicable" }, "value": { "bound": "less_than", "_source": "S-CHIGGIATO-CAS-2017", "as_printed": { "value": "1e-13", "unit_printed": "mbar ℓ s-1 cm-2", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 1e-13 }, "conditions": "Section 5 of the source, verbatim: for copper and aluminium alloys, a few bakeout at 150-200 C for 24 hours are sufficient to reduce the hydrogen-outgassing rate to less than 1e-13 mbar l per s per cm2. The bake temperature is a range of 150 to 200 C, midpoint written in the field, range verbatim here. The statement covers several bakeout cycles, not one.", "contradictions": [] }, { "id": "og-al-h2-6061-fedchak", "slug": "aluminum-6061", "grade": null, "material_verbatim": "6061-T651 aluminum, no heat treatment", "class": "rate", "species": "H2", "state": "baked", "treatment": "UHV cleaning, aqueous ultrasonic rinse then acetone wipe (Anderson-Dahlen)", "bake": { "temp_C": 137, "hours": 72, "_source": "S-FEDCHAK-2021" }, "measurement": { "method": "accumulation", "temp_C": 25, "pumping_time_h": "not-applicable" }, "value": { "_source": "S-FEDCHAK-2021", "as_printed": { "value": "5.5e-12", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 5.5e-14 }, "conditions": "Table IV, published as 5.5e-12 Pa L/s/cm2 at 298.15 K, converted at build by the exact definition of the units. Rate-of-rise with spinning rotor gauge, SI traceable. Bake stated as 125 to 150 C for a minimum of 72 h, midpoint written in the field. Uncertainty 72 percent, k equals 2, for rates below 1e-11 Pa L/s/cm2. Chamber 3 mm walls, aluminium gasket and aluminium orifice. Composition from supplier certificates in Table I.", "diffusion": { "D0_cm2_s": null, "Ea_eV": 0.37, "_source": "S-FEDCHAK-2021", "note": "Activation energy for hydrogen diffusion from the Arrhenius fit of Eq. 4, 4250 K. The source publishes no D0 for this fit, only A0 related to the initial hydrogen concentration." }, "contradictions": [] }, { "id": "og-al-h2-baked-cas", "slug": "aluminum-6061", "grade": null, "material_verbatim": "Al alloys", "class": "rate", "species": "H2", "state": "baked", "treatment": "state-of-art cleaning", "bake": { "temp_C": 150, "hours": 20, "_source": "S-CHIGGIATO-CAS-2017" }, "measurement": { "method": "stated", "temp_C": 23, "pumping_time_h": "not-applicable" }, "value": { "bound": "approx", "_source": "S-CHIGGIATO-CAS-2017", "as_printed": { "value": "1e-13", "unit_printed": "mbar·ℓ/s·cm²", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 1e-13 }, "conditions": "Table 3, bakeout at 100 C to 200 C for about 20 h, midpoint written in the field, range verbatim here. The source credits this row to Benvenuti Physica Scripta T22 (1988), Moraw and Dobrozemsky Jpn. J. Appl. Phys. 13 (1974) 264, Halama JVST 16 (1979) 717, and Suemitsu et al. JVST A 5 (1987) 37. Alloy not named at this row.", "contradictions": [] }, { "id": "og-al-h2-6060-cas", "slug": "aluminum-6061", "grade": null, "material_verbatim": "AA 6060 Al alloys", "class": "rate", "species": "H2", "state": "baked", "treatment": "state-of-art cleaning", "bake": { "temp_C": 150, "hours": 24, "_source": "S-CHIGGIATO-CAS-2017" }, "measurement": { "method": "stated", "temp_C": 23, "pumping_time_h": "not-applicable" }, "value": { "bound": "less_or_equal", "_source": "S-CHIGGIATO-CAS-2017", "as_printed": { "value": "1e-13", "unit_printed": "mbar ℓ s-1 cm-2", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 1e-13 }, "conditions": "Table 4, bakeout for 24 h, published as at most 1e-13. The source credits this row to Benvenuti, Bojon, Chiggiato and Losch, Ultimate pressures of the LEP vacuum system, Vacuum 44 (1993) 507-509. AA 6060 is a different alloy from the 6061-T651 measured by S-FEDCHAK-2021 on this card.", "contradictions": [] }, { "id": "og-al-h2o-6061-fedchak", "slug": "aluminum-6061", "grade": null, "material_verbatim": "6061-T651 aluminum, no heat treatment", "class": "rate", "species": "H2O", "state": "unbaked", "treatment": "UHV cleaning, aqueous ultrasonic rinse then acetone wipe (Anderson-Dahlen)", "bake": null, "measurement": { "method": "throughput", "temp_C": 25, "pumping_time_h": "curve-abscissa" }, "curve": { "points": [ { "t_h": 0.556, "as_printed": { "value": "1.6e-6", "unit_printed": "Pa L/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 1.6e-8 }, { "t_h": 2.778, "as_printed": { "value": "3.2e-7", "unit_printed": "Pa L/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 3.2e-9 }, { "t_h": 27.778, "as_printed": { "value": "3e-8", "unit_printed": "Pa L/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 3e-10 } ], "troncons": [ { "t_h_min": 0.556, "t_h_max": 27.778, "_source": "S-FEDCHAK-2021" } ] }, "conditions": "Table III, published in Pa L/s/cm2 at 2e3, 1e4 and 1e5 s, converted at build by the exact definition of the units, times converted to hours. Power law fit alpha 1.0. Uncertainty 33 percent. The source finds the aluminium chamber a factor 2.5 higher than 304L at 1e5 s, the worst of the seven for water.", "contradictions": [] }, { "id": "og-ti-h2-grade2-fedchak", "slug": "titanium", "grade": null, "material_verbatim": "titanium, ASTM grade 2 (unalloyed), no heat treatment", "class": "rate", "species": "H2", "state": "baked", "treatment": "UHV cleaning, aqueous ultrasonic rinse then acetone wipe (Anderson-Dahlen)", "bake": { "temp_C": 137, "hours": 72, "_source": "S-FEDCHAK-2021" }, "measurement": { "method": "accumulation", "temp_C": 25, "pumping_time_h": "not-applicable" }, "value": { "_source": "S-FEDCHAK-2021", "as_printed": { "value": "2.5e-12", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 2.5e-14 }, "conditions": "Table IV, published as 2.5e-12 Pa L/s/cm2, converted at build by the exact definition of the units. This value is the average of all titanium measurements, not a fit: the source states the temperature dependence of the titanium chamber did not follow the Arrhenius relationship, so no activation energy is given. The measured rate decreased over time after the bake, which the source attributes to hydrogen depleting from the surface layer down to the noise floor. The source also states that re-adsorption of outgassed hydrogen on the titanium surface is possible and that the true rate may therefore be larger. Uncertainty 72 percent. Lowest H2 rate of the seven chambers, a factor of about 300 better than 304L.", "contradictions": [] }, { "id": "og-ti-h2o-grade2-fedchak", "slug": "titanium", "grade": null, "material_verbatim": "titanium, ASTM grade 2 (unalloyed), no heat treatment", "class": "rate", "species": "H2O", "state": "unbaked", "treatment": "UHV cleaning, aqueous ultrasonic rinse then acetone wipe (Anderson-Dahlen)", "bake": null, "measurement": { "method": "throughput", "temp_C": 25, "pumping_time_h": "curve-abscissa" }, "curve": { "points": [ { "t_h": 0.556, "as_printed": { "value": "6.4e-7", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 6.4e-9 }, { "t_h": 2.778, "as_printed": { "value": "1.3e-7", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 1.3e-9 }, { "t_h": 27.778, "as_printed": { "value": "1.3e-8", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 1.3e-10 } ], "troncons": [ { "t_h_min": 0.556, "t_h_max": 27.778, "_source": "S-FEDCHAK-2021" } ] }, "conditions": "Table III, converted at build by the exact definition of the units, times converted to hours. Alpha 1.0. Uncertainty 33 percent. At 1e5 s the titanium chamber is about 10 percent above 304L, which the source states is within the measurement uncertainty: the best hydrogen material of the study has no water advantage.", "contradictions": [] }, { "id": "og-be-h2-baked-cas", "slug": "beryllium", "grade": null, "material_verbatim": "Beryllium", "class": "rate", "species": "H2", "state": "baked", "treatment": "state-of-art cleaning", "bake": { "temp_C": 150, "hours": 24, "_source": "S-CHIGGIATO-CAS-2017" }, "measurement": { "method": "throughput", "temp_C": 23, "pumping_time_h": "not-applicable" }, "value": { "bound": "less_than", "_source": "S-CHIGGIATO-CAS-2017", "as_printed": { "value": "1e-14", "unit_printed": "mbar ℓ s-1 cm-2", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 1e-14 }, "conditions": "Table 4, bakeout for 24 h, published as below 1e-14. Measured at CERN by Ivo Wevers, Geraldine Chuste and the author. A bound, not a measured value: the rate is below the sensitivity reported at this row.", "contradictions": [] }, { "id": "og-neoprene-h2o-10h-cas", "slug": "std-elastomers", "grade": null, "material_verbatim": "Neoprene", "class": "rate", "species": "H2O", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": 23, "pumping_time_h": 10 }, "value": { "bound": "approx", "_source": "S-CHIGGIATO-CAS-2017", "as_printed": { "value": "1e-5", "unit_printed": "mbar·ℓ/s·cm²", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00001 }, "conditions": "Table 3, measured at room temperature. The source credits this row to R.N. Peacock, Practical selection of elastomer materials for vacuum seals, J. Vac. Sci. Technol. 17 (1980) 330. Five orders of magnitude above unbaked austenitic stainless steel at the same pumping time. The source works out the consequence: a 1 cm2 piece of a few mm thick Neoprene inside a 1 m2 stainless vessel, 0.01 percent of the area, raises the pressure after 10 h of pumping by one order of magnitude.", "contradictions": [] }, { "id": "og-peek-h2o-baked-125-cas", "slug": "peek-kapton", "grade": null, "material_verbatim": "PEEK disks, 2 mm thick", "class": "rate", "species": "H2O", "state": "baked", "treatment": "as received, TML 0.21 percent and CVCM 0.01 percent by weight loss method, the CVCM being at the microbalance sensitivity and not significant", "bake": { "temp_C": 125, "hours": 20, "_source": "S-CHIGGIATO-CAS-2017" }, "measurement": { "method": "accumulation", "temp_C": 23, "pumping_time_h": "not-applicable" }, "value": { "bound": "approx", "_source": "S-CHIGGIATO-CAS-2017", "as_printed": { "value": "1e-8", "unit_printed": "mbar ℓ s-1 cm-2", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 1e-8 }, "conditions": "Section 6.3, combined accumulation-throughput method. Two reservations published by the source and carried here: accumulation methods cannot give valid results for water outgassing, especially on polymers, and the figure is described as a rough estimation in the low 1e-8. Water was still the leading gas after the bake, the 18 amu peak more than ten times the peaks at 2, 28 and 44 amu.", "diffusion": { "D_cm2_s": 3.9e-9, "temp_C": 23, "_source": "S-CHIGGIATO-CAS-2017", "note": "Water diffusion coefficient in PEEK, obtained by best fit of the semi-infinite model on the unbaked throughput curve, where the slope of log q against log t is minus one half after about 3 h of pumping. The source compares it to a literature value of 5e-9 cm2/s from Mensitieri et al., J. Applied Polymer Science 37 (1989) 381." }, "contradictions": [] }, { "id": "og-peek-n2-baked-125-cas", "slug": "peek-kapton", "grade": null, "material_verbatim": "PEEK disks, 2 mm thick", "class": "rate", "species": "N2", "state": "baked", "treatment": "as received", "bake": { "temp_C": 125, "hours": 20, "_source": "S-CHIGGIATO-CAS-2017" }, "measurement": { "method": "accumulation", "temp_C": 23, "pumping_time_h": "not-applicable" }, "value": { "_source": "S-CHIGGIATO-CAS-2017", "as_printed": { "value": "2.5e-10", "unit_printed": "mbar ℓ s-1 cm-2", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 2.5e-10 }, "conditions": "Section 6.3, combined accumulation-throughput method with a calibrated RGA. Activation energy 0.33 eV per molecule from the Arrhenius plot of accumulations lasting about 6 h at each measurement temperature. The 28 amu signal is attributed to N2 by the ratio of the 28 to 14 amu peaks.", "contradictions": [] }, { "id": "og-peek-co2-baked-125-cas", "slug": "peek-kapton", "grade": null, "material_verbatim": "PEEK disks, 2 mm thick", "class": "rate", "species": "CO2", "state": "baked", "treatment": "as received", "bake": { "temp_C": 125, "hours": 20, "_source": "S-CHIGGIATO-CAS-2017" }, "measurement": { "method": "accumulation", "temp_C": 23, "pumping_time_h": "not-applicable" }, "value": { "_source": "S-CHIGGIATO-CAS-2017", "as_printed": { "value": "1.3e-10", "unit_printed": "mbar ℓ s-1 cm-2", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 1.3e-10 }, "conditions": "Section 6.3, same run as the N2 value. Activation energy 0.34 eV per molecule.", "contradictions": [] }, { "id": "og-peek-h2-nodata-cas", "slug": "peek-kapton", "grade": null, "material_verbatim": "PEEK disks, 2 mm thick", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "Hydrogen outgassing could not be measured on this sample after the bake.", "motif": "The source states that the very high partial pressure of water made the 2 amu peak mainly due to the fragmentation pattern of the water molecule, so the hydrogen rate could not be extracted. This is a measurement limit reported by the source, not a missing entry.", "_source": "S-CHIGGIATO-CAS-2017", "contradictions": [] }, { "id": "og-peek-ar-nodata-extraction", "slug": "peek-kapton", "grade": null, "material_verbatim": "PEEK disks, 2 mm thick", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "The argon rate published for this sample is not written into the base.", "motif": "Section 6.3 publishes an argon outgassing rate alongside the N2 and CO2 values, but the exponent did not survive text extraction of the source and reads as 8e-1, which is physically impossible for this quantity. The activation energy for argon, 0.27 eV per molecule, is legible and stated here. The value itself waits for a reading of the figure or of the typeset article. Nothing approximate is written.", "_source": "S-CHIGGIATO-CAS-2017", "contradictions": [] }, { "id": "og-kapton-hn-h2o-nodata-cas", "slug": "peek-kapton", "grade": null, "material_verbatim": "Kapton HN foils, 0.0125 mm to 0.125 mm thick", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "Water outgassing rates of Kapton HN foils are published as curves, no tabulated value is available.", "motif": "Section 6.4 gives q(t) for several thicknesses in Fig. 34 only. The behaviour is stated: the rate follows the inverse square root of pumping time at short times, then falls much faster, with tails most likely going as t to the power minus three rather than the exponential predicted by the slab diffusion model, which the source attributes to water dissolved in the micro-voids of the amorphous phase. The time at which the regime changes increases with sample thickness. Underlying study: S.G. Sammartano, Outgassing rates of PEEK, Kapton and Vespel polymers, Master Thesis, Arcada, Helsinki, 2020. Measurements at CERN by Sergio Giacomo Sammartano, Ivo Wevers and Giuseppe Bregliozzi.", "_source": "S-CHIGGIATO-CAS-2017", "diffusion": { "D_cm2_s": 1.7e-9, "temp_C": 23, "_source": "S-CHIGGIATO-CAS-2017", "note": "Water diffusion coefficient from a global fit of the curves, with an initial water content of about 1 percent by weight." }, "contradictions": [] }, { "id": "og-tizrv-kr-activated-cas", "slug": "neg-tizrv", "grade": null, "material_verbatim": "Magnetron sputtered TiZrV thin films after activation", "class": "rate", "species": "Kr", "state": "activated", "treatment": "magnetron sputtered TiZrV thin film, activated", "bake": null, "measurement": { "method": "accumulation", "temp_C": 23, "pumping_time_h": "not-applicable" }, "value": { "bound": "approx", "_source": "S-CHIGGIATO-CAS-2017", "as_printed": { "value": "1e-18", "unit_printed": "mbar·ℓ/s·cm²", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 1e-18 }, "conditions": "Table 3 and section 3.3. Measured by the combined accumulation-throughput method on a TiZrV coated chamber of standard LHC long straight section geometry, 7 m long, 8 cm diameter. The source states this method works only for gases that are not readsorbed on the walls of the system. About 20 molecules per second per square centimetre. Lowest value published in the source, thirteen orders of magnitude below unbaked stainless steel water at 10 h.", "contradictions": [] }, { "id": "og-neg-pumps-declaration-benv", "slug": "neg-tizrv", "grade": null, "material_verbatim": "non-evaporable getter coatings and strips", "class": "declaration", "kind": "pumps", "sign": "negative", "text": "An activated getter surface is a pump, not a gas source, for the gases it chemisorbs. It does not pump methane or the noble gases.", "motif": "The source states that a vacuum chamber sputter-coated with a getter film may be transformed from a gas source to a pump by activating the coating during standard in situ bakeout. It also states that methane is not pumped by getters, and that the ultimate pressure of the LEP NEG pump is set by the outgassing of CH4 and Ar, gases not pumped by NEGs, divided by the pumping speed of a sputter-ion pump. A base that carries only a magnitude for these surfaces loses the sign and the species boundary, which are the two facts that matter in design.", "_source": "S-BENVENUTI-EPAC1998", "contradictions": [] }, { "id": "og-tizrv-activation-benv", "slug": "neg-tizrv", "grade": null, "material_verbatim": "TiZrV coating, magnetron sputtered from intertwisted Ti, Zr and V wires", "class": "declaration", "kind": "insufficient_data", "sign": "negative", "text": "No static outgassing rate is published for the activated TiZrV coating in this source, only its activation condition and its pumping behaviour.", "motif": "The source states that TiZrV is practically fully activated after 24 h baking at 200 C, and that adding vanadium to TiZr shifts activation about 50 C lower for all degassing products, H2, CO, CO2 and CH4. Ultimate pressures after 24 h baking and H2 sticking coefficients are published as curves, on chambers 2 m long, 10 cm diameter, with 25 L/s applied for H2. Later literature from the same group is reported to give 180 C for 24 h, that value is not written here because the document publishing it has not been read on the page. Reading it is on the library list.", "_source": "S-BENVENUTI-EPAC1998", "contradictions": [] }, { "id": "og-tizr-activation-benv", "slug": "neg-tizrv", "grade": null, "material_verbatim": "equiatomic TiZr coating on stainless steel", "class": "declaration", "kind": "insufficient_data", "sign": "negative", "text": "Activation of the equiatomic TiZr coating starts at 150 C and is complete at 300 C for 2 h heating.", "motif": "Section 3 of the source, from electron stimulated desorption measurements at 20 C after 2 h heating, electron energy 500 eV, current 1 mA, without intermediate air venting. For elemental Ti, Zr and Hf coatings no degassing variation is noticeable up to 200 C. The source gives the conversion between heating times: extending from 2 h to 24 h roughly corresponds to increasing the 2 h temperature by 50 C. Desorption yields are published as curves, no static outgassing rate is tabulated.", "_source": "S-BENVENUTI-EPAC1998", "contradictions": [] }, { "id": "og-st101-declaration-benv", "slug": "st707-zao", "grade": null, "material_verbatim": "St 101 NEG strip, Zr84-Al16 powder on constantan, 30 mm wide, 100 micron coating both sides (SAES Getters)", "class": "declaration", "kind": "pumps", "sign": "negative", "text": "Getter strip used as a linear pump, activated by resistive heating to 750 C for about half an hour.", "motif": "Section 1 of the source, LEP vacuum system, about 23 of the 27 km. Pumping speed for H2 about 2000 L/s per linear metre. Ultimate pressure about 2e-12 Torr in a LEP dipole chamber after 24 h baking at 150 C, set by the outgassing of CH4 and Ar divided by the pumping speed of a sputter-ion pump of about 50 L/s nominal for a 12 m chamber, with six such pumps on the same chamber, about 5e-13 Torr. Porosity raised from 7 to 13 percent for the LEP delivery. These are pumping speeds and system pressures, not specific outgassing rates. Card assignment to be checked at integration: this strip may belong to a card other than st707-zao.", "_source": "S-BENVENUTI-EPAC1998", "contradictions": [] }, { "id": "og-st707-declaration-benv", "slug": "st707-zao", "grade": null, "material_verbatim": "St 707 NEG strip (SAES Getters)", "class": "declaration", "kind": "pumps", "sign": "negative", "text": "Getter strip activated passively during a stainless steel bakeout, around 400 C, no electrical feedthrough required.", "motif": "Section 1 of the source: pumping curves very similar to those of St 101 are obtained after heating at 350 to 400 C. Covering the inner surface of a chamber entirely with St 707 strip, a total NEG pump, gives pumping speeds above 1e4 L/s per linear metre after a 350 C bakeout and pressures below 1e-13 Torr, measured in a 3 m stainless steel tube and stated by the source to be extrapolable to any length because the pump is modular.", "_source": "S-BENVENUTI-EPAC1998", "contradictions": [] }, { "id": "og-ligo-ss-304-unbaked", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Stainless Steels, the row covering 18-8, 17-4PH, 301, 302, 304, 304L, 304LN, 316, 316L, 316LN, 317, 317L, ferritic and martensitic grades, A286 and Nitronic 60", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "1.8e-08", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.3998e-8 }, "additional_species": [ { "species": "H2O", "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "1.8e-08", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.3998e-8 } ], "conditions": "Table 1, row H21, condition column reads unbaked. Published in torr-liter/s/cm2 and converted to the canonical unit at build by the exact definition of the units: Jtotal 1.8e-08 torr-liter/s/cm2, JH2O 1.8e-08 torr-liter/s/cm2. No pumping time and no measurement temperature are given anywhere in the table. Footnote 8 of the source states the entries are representative of material sample measurements and provided as a design guideline for working up a gas budget. Table references: 1, Dayton, Trans. 6th Nat. Vacuum Congress (1960) p 101. The values are annotated in the table as applying to 304 and 304L only, although the row lists twelve grades.", "contradictions": [] }, { "id": "og-ligo-cu-unbaked", "slug": "copper-ofe", "grade": null, "material_verbatim": "Copper (elemental and OFHC)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "4.2e-09", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 5.59954e-9 }, "additional_species": [ { "species": "H2O", "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "4.2e-09", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 5.59954e-9 } ], "conditions": "Table 1, row H6, condition column reads unbaked. Published in torr-liter/s/cm2 and converted to the canonical unit at build by the exact definition of the units: Jtotal 4.2e-09 torr-liter/s/cm2, JH2O 4.2e-09 torr-liter/s/cm2. No pumping time and no measurement temperature are given anywhere in the table. Footnote 8 of the source states the entries are representative of material sample measurements and provided as a design guideline for working up a gas budget. Table references: 2, Schram, Le Vide No 103 (1963) p 55, 6, Coyne, Allowable Bake Temperature for UHV Processing of Copper Alloys, LIGO-T0900368-v2.", "contradictions": [] }, { "id": "og-ligo-al-unbaked", "slug": "aluminum-6061", "grade": null, "material_verbatim": "Aluminium and aluminium alloys, 2000, 4000, 5000 and 6000 series, wrought form", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "7.6e-09", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.01325e-8 }, "additional_species": [ { "species": "H2O", "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "7.6e-09", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.01325e-8 } ], "conditions": "Table 1, row H1, condition column reads unbaked. Published in torr-liter/s/cm2 and converted to the canonical unit at build by the exact definition of the units: Jtotal 7.6e-09 torr-liter/s/cm2, JH2O 7.6e-09 torr-liter/s/cm2. No pumping time and no measurement temperature are given anywhere in the table. Footnote 8 of the source states the entries are representative of material sample measurements and provided as a design guideline for working up a gas budget. Table references: 1, Dayton (1960), 8, Coyne, LIGO-L070132-00. The 7000 series is excluded by the source because of its zinc content.", "contradictions": [] }, { "id": "og-ligo-mo-unbaked", "slug": "moly-tzm", "grade": null, "material_verbatim": "Molybdenum", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "6.8e-07", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 9.06592e-7 }, "additional_species": [ { "species": "H2O", "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "6.8e-07", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 9.06592e-7 } ], "conditions": "Table 1, row H11, condition column reads unbaked. Published in torr-liter/s/cm2 and converted to the canonical unit at build by the exact definition of the units: Jtotal 6.8e-07 torr-liter/s/cm2, JH2O 6.8e-07 torr-liter/s/cm2. No pumping time and no measurement temperature are given anywhere in the table. Footnote 8 of the source states the entries are representative of material sample measurements and provided as a design guideline for working up a gas budget. Table references: 3, Holland, Steckelmacher, Yarwood, Vacuum Manual (1974).", "contradictions": [] }, { "id": "og-ligo-w-unbaked", "slug": "tungsten", "grade": null, "material_verbatim": "Tungsten", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "1.95e-07", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.59979e-7 }, "additional_species": [ { "species": "H2O", "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "1.95e-07", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.59979e-7 } ], "conditions": "Table 1, row H25, condition column reads unbaked. Published in torr-liter/s/cm2 and converted to the canonical unit at build by the exact definition of the units: Jtotal 1.95e-07 torr-liter/s/cm2, JH2O 1.95e-07 torr-liter/s/cm2. No pumping time and no measurement temperature are given anywhere in the table. Footnote 8 of the source states the entries are representative of material sample measurements and provided as a design guideline for working up a gas budget. Table references: 3, Holland, Steckelmacher, Yarwood, Vacuum Manual (1974).", "contradictions": [] }, { "id": "og-ligo-ag-unbaked", "slug": null, "grade": null, "material_verbatim": "Silver", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "6e-07", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 7.99934e-7 }, "additional_species": [ { "species": "H2O", "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "6e-07", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 7.99934e-7 } ], "conditions": "Table 1, row H19, condition column reads unbaked. Published in torr-liter/s/cm2 and converted to the canonical unit at build by the exact definition of the units: Jtotal 6e-07 torr-liter/s/cm2, JH2O 6e-07 torr-liter/s/cm2. No pumping time and no measurement temperature are given anywhere in the table. Footnote 8 of the source states the entries are representative of material sample measurements and provided as a design guideline for working up a gas budget. Table references: 3, Holland, Steckelmacher, Yarwood, Vacuum Manual (1974).", "contradictions": [] }, { "id": "og-ligo-pyrex-unbaked", "slug": "silica-borosilicate", "grade": null, "material_verbatim": "Pyrex glass", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "1.6e-10", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.13316e-10 }, "additional_species": [ { "species": "H2O", "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "1.6e-10", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.13316e-10 } ], "conditions": "Table 1, row F4, condition column reads unbaked. Published in torr-liter/s/cm2 and converted to the canonical unit at build by the exact definition of the units: Jtotal 1.6e-10 torr-liter/s/cm2, JH2O 1.6e-10 torr-liter/s/cm2. No pumping time and no measurement temperature are given anywhere in the table. Footnote 8 of the source states the entries are representative of material sample measurements and provided as a design guideline for working up a gas budget. Table references: 2, Schram, Le Vide No 103 (1963).", "contradictions": [] }, { "id": "og-ligo-glass-unbaked", "slug": null, "grade": null, "material_verbatim": "Glass, non-leaded", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "1e-08", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.33322e-8 }, "additional_species": [ { "species": "H2O", "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "1e-08", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.33322e-8 } ], "conditions": "Table 1, row F5, condition column reads unbaked. Published in torr-liter/s/cm2 and converted to the canonical unit at build by the exact definition of the units: Jtotal 1e-08 torr-liter/s/cm2, JH2O 1e-08 torr-liter/s/cm2. No pumping time and no measurement temperature are given anywhere in the table. Footnote 8 of the source states the entries are representative of material sample measurements and provided as a design guideline for working up a gas budget. Table references: 4, Lewin, Fundamentals of Vacuum Science and Technology (1965) p 72.", "contradictions": [] }, { "id": "og-ligo-porcelain-unbaked", "slug": null, "grade": null, "material_verbatim": "Glazed ceramics, for example porcelain", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "1e-08", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.33322e-8 }, "additional_species": [ { "species": "H2O", "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "1e-08", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.33322e-8 } ], "conditions": "Table 1, row B5, condition column reads unbaked. Published in torr-liter/s/cm2 and converted to the canonical unit at build by the exact definition of the units: Jtotal 1e-08 torr-liter/s/cm2, JH2O 1e-08 torr-liter/s/cm2. No pumping time and no measurement temperature are given anywhere in the table. Footnote 8 of the source states the entries are representative of material sample measurements and provided as a design guideline for working up a gas budget. Table references: 1, Dayton (1960), 4, Lewin (1965).", "contradictions": [] }, { "id": "og-ligo-frit-baked", "slug": null, "grade": null, "material_verbatim": "Clayless Black Enamel, Ferro Corp. L.O. 34792, fired onto prototype stainless steel baffles for the beam tube", "class": "rate", "species": "total", "state": "baked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "7.3e-13", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 9.73253e-13 }, "additional_species": [ { "species": "H2O", "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "5e-15", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 6.66612e-15 }, { "species": "H2", "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "6.9e-13", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 9.19924e-13 }, { "species": "HC", "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "1.2e-16", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.59987e-16 } ], "conditions": "Table 1, row B4, condition column reads stressed and baked. Published in torr-liter/s/cm2 and converted to the canonical unit at build by the exact definition of the units: Jtotal 7.3e-13 torr-liter/s/cm2, JH2O 5e-15 torr-liter/s/cm2, JH2 6.9e-13 torr-liter/s/cm2, JHC 1.2e-16 torr-liter/s/cm2. No pumping time and no measurement temperature are given anywhere in the table. Footnote 8 of the source states the entries are representative of material sample measurements and provided as a design guideline for working up a gas budget. Table references: 21, B. Taylor and D. Coyne, Material Qualification RGA Test Results: Ferro Corporation RM108 Frit, LIGO-E1000221-v1.", "contradictions": [] }, { "id": "og-ligo-ep302-baked", "slug": "vacuum-epoxies", "grade": null, "material_verbatim": "MasterBond EP30-2 epoxy", "class": "rate", "species": "total", "state": "not-stated", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "5.6e-11", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 7.46605e-11 }, "additional_species": [ { "species": "H2O", "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "2.2e-12", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.93309e-12 }, { "species": "H2", "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "1.2e-12", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.59987e-12 }, { "species": "HC", "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "5e-13", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 6.66612e-13 } ], "conditions": "Table 1, row A12, condition column reads not stated. Published in torr-liter/s/cm2 and converted to the canonical unit at build by the exact definition of the units: Jtotal 5.6e-11 torr-liter/s/cm2, JH2O 2.2e-12 torr-liter/s/cm2, JH2 1.2e-12 torr-liter/s/cm2, JHC 5e-13 torr-liter/s/cm2. No pumping time and no measurement temperature are given anywhere in the table. Footnote 8 of the source states the entries are representative of material sample measurements and provided as a design guideline for working up a gas budget. Table references: 23, B. Taylor and D. Coyne, LIGO-E1000386-v1, 24, Optical Contamination Test Results, LIGO-E1000479-v1.", "contradictions": [] }, { "id": "og-ligo-peek-esd480-baked", "slug": "peek-kapton", "grade": null, "material_verbatim": "PEEK, Semitron ESd 480 from Boedeker Plastics, a static dissipative reinforced PEEK", "class": "rate", "species": "total", "state": "baked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "7.2e-12", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 9.59921e-12 }, "additional_species": [ { "species": "H2O", "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "3.5e-13", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 4.66628e-13 }, { "species": "H2", "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "8.9e-14", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.18657e-13 }, { "species": "HC", "_source": "S-LIGO-E960050-V13", "as_printed": { "value": "1.8e-13", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.3998e-13 } ], "conditions": "Table 1, row I6, condition column reads cleaned and baked. Published in torr-liter/s/cm2 and converted to the canonical unit at build by the exact definition of the units: Jtotal 7.2e-12 torr-liter/s/cm2, JH2O 3.5e-13 torr-liter/s/cm2, JH2 8.9e-14 torr-liter/s/cm2, JHC 1.8e-13 torr-liter/s/cm2. No pumping time and no measurement temperature are given anywhere in the table. Footnote 8 of the source states the entries are representative of material sample measurements and provided as a design guideline for working up a gas budget. Table references: 25, B. Taylor and D. Coyne, Material Qualification RGA Test Results: Semitron ESD 480 PEEK, LIGO-E1000298-v1.", "contradictions": [] }, { "id": "og-ligo-epotek-353nd-nodata", "slug": "vacuum-epoxies", "grade": null, "material_verbatim": "Epo-Tek 353ND epoxy", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "A single outgassing figure of 1e-15 torr-liter/s/cm2 is published for this epoxy, but the species column it belongs to could not be resolved.", "motif": "Row A14 of Table 1 carries one number across four species columns, JTotal, Jwater, JH2 and JHC, and the column alignment did not survive text extraction of the source. Nothing is written rather than guessing the species. Underlying qualification documents named by the table: LIGO-E1300653-v1 and LIGO-E1300654-v1.", "_source": "S-LIGO-E960050-V13", "contradictions": [] }, { "id": "og-ligo-fluorel-nodata", "slug": "viton", "grade": null, "material_verbatim": "3M/Dyneon Fluorel FC2180, processed per LIGO-E970130-A", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "Two figures are published for this fluoroelastomer, 8.8e-13 unbaked and 1.9e-13 baked, in torr-liter/s/cm2, but the species column could not be resolved.", "motif": "Row I9 of Table 1. Same column alignment problem as row A14. The pair is worth reading for the ratio it shows, a factor of about 4.6 gained by baking, but the species is not written without certainty.", "_source": "S-LIGO-E960050-V13", "contradictions": [] }, { "id": "pr-ligo-ss-bake", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Stainless steel, including Invar", "class": "procedure", "procedure_kind": "bakeout", "bake": { "temp_C": 200, "hours": 48, "atmosphere": "vacuum", "_source": "S-LIGO-E960022-V24" }, "conditions": "Section 13.10. Prescribed clean and bake condition, not a measurement. The document states the procedures are consistent with baking a material at the maximum temperature possible and with meeting the summed mass pressure limit, and that vacuum baking is preferred over air baking because it allows an RGA scan of the load.", "_source": "S-LIGO-E960022-V24", "contradictions": [] }, { "id": "pr-ligo-al6061-bake", "slug": "aluminum-6061", "grade": null, "material_verbatim": "Aluminium 6061-T6", "class": "procedure", "procedure_kind": "bakeout", "bake": { "temp_C": 150, "hours": 48, "atmosphere": "vacuum", "_source": "S-LIGO-E960022-V24" }, "conditions": "Section 13.6. Prescribed clean and bake condition, not a measurement. The document states the procedures are consistent with baking a material at the maximum temperature possible and with meeting the summed mass pressure limit, and that vacuum baking is preferred over air baking because it allows an RGA scan of the load. The document states tempered aluminium is very sensitive to reheat and can lose significant yield strength with excessive bake temperature or time, and that this cycle keeps strength losses below 5 percent. All other aluminium alloys are baked at 120 C for 48 hours.", "_source": "S-LIGO-E960022-V24", "contradictions": [] }, { "id": "pr-ligo-cu-bake", "slug": "copper-ofe", "grade": null, "material_verbatim": "Copper and copper alloys, including OFHC, beryllium copper and aluminium bronze, excluding phosphor bronze", "class": "procedure", "procedure_kind": "bakeout", "bake": { "temp_C": 200, "hours": 48, "atmosphere": "vacuum", "_source": "S-LIGO-E960022-V24" }, "conditions": "Section 13.13. Prescribed clean and bake condition, not a measurement. The document states the procedures are consistent with baking a material at the maximum temperature possible and with meeting the summed mass pressure limit, and that vacuum baking is preferred over air baking because it allows an RGA scan of the load. Phosphor bronze is baked in air at 200 C for 24 hours. If any other copper alloy must be air baked rather than vacuum baked, the document limits it to 175 C for 48 hours. All parts must be wrought, not cast.", "_source": "S-LIGO-E960022-V24", "contradictions": [] }, { "id": "pr-ligo-ceramics-bake", "slug": null, "grade": null, "material_verbatim": "Ceramics, including Macor and Zerodur", "class": "procedure", "procedure_kind": "bakeout", "bake": { "temp_C": 200, "hours": 48, "atmosphere": "vacuum", "_source": "S-LIGO-E960022-V24" }, "conditions": "Section 13.16. Prescribed clean and bake condition, not a measurement. The document states the procedures are consistent with baking a material at the maximum temperature possible and with meeting the summed mass pressure limit, and that vacuum baking is preferred over air baking because it allows an RGA scan of the load. Default condition in the absence of better information, with ultrasonic cleaning in Liquinox beforehand. The document notes many ceramics can be baked higher and asks the cognizant engineer to specify.", "_source": "S-LIGO-E960022-V24", "contradictions": [] }, { "id": "pr-ligo-peek-bake", "slug": "peek-kapton", "grade": null, "material_verbatim": "PEEK connectors, Kapton cabling and wire harnesses", "class": "procedure", "procedure_kind": "bakeout", "bake": { "temp_C": 200, "hours": 48, "atmosphere": "vacuum", "_source": "S-LIGO-E960022-V24" }, "conditions": "Section 13.26.1. Prescribed clean and bake condition, not a measurement. The document states the procedures are consistent with baking a material at the maximum temperature possible and with meeting the summed mass pressure limit, and that vacuum baking is preferred over air baking because it allows an RGA scan of the load. Preceded by ultrasonic cleaning in methanol for 10 minutes.", "_source": "S-LIGO-E960022-V24", "contradictions": [] }, { "id": "pr-ligo-pfa-bake", "slug": null, "grade": null, "material_verbatim": "PFA 440 HP grade Teflon", "class": "procedure", "procedure_kind": "bakeout", "bake": { "temp_C": 120, "hours": 48, "atmosphere": "vacuum", "_source": "S-LIGO-E960022-V24" }, "conditions": "Section 13.20. Prescribed clean and bake condition, not a measurement. The document states the procedures are consistent with baking a material at the maximum temperature possible and with meeting the summed mass pressure limit, and that vacuum baking is preferred over air baking because it allows an RGA scan of the load. Only the 440 HP grade is approved. Parts requiring high dimensional tolerances are not to be made of it.", "_source": "S-LIGO-E960022-V24", "contradictions": [] }, { "id": "pr-ligo-fluoro-bake", "slug": "viton", "grade": null, "material_verbatim": "Fluoroelastomer molded castings, Fluorel and Viton, manufactured per E970130", "class": "procedure", "procedure_kind": "bakeout", "bake": { "temp_C": 182, "hours": 48, "atmosphere": "vacuum", "_source": "S-LIGO-E960022-V24" }, "conditions": "Section 13.17.2.1. Prescribed clean and bake condition, not a measurement. The document states the procedures are consistent with baking a material at the maximum temperature possible and with meeting the summed mass pressure limit, and that vacuum baking is preferred over air baking because it allows an RGA scan of the load. Ramp from room temperature at no more than 2.5 C per minute, hold 182 C plus or minus 1 C at a pressure not exceeding 1e-6 torr for 48 hours, cool in vacuum at no more than 3 C per minute. Free fluorine extraction, five pressure-cook cycles in DI water at 15 psi for 2 hours, precedes the bake. The document warns these parts can emit a large amount of hydrocarbon material and asks that surface exposure be maximised and surface contact minimised during the bake.", "_source": "S-LIGO-E960022-V24", "contradictions": [] }, { "id": "pr-ligo-oring-large-bake", "slug": null, "grade": null, "material_verbatim": "Large diameter vacuum equipment O-rings, for chamber doors", "class": "procedure", "procedure_kind": "bakeout", "bake": { "temp_C": 150, "hours": 48, "atmosphere": "vacuum", "_source": "S-LIGO-E960022-V24" }, "conditions": "Section 13.17.2.4. Prescribed clean and bake condition, not a measurement. The document states the procedures are consistent with baking a material at the maximum temperature possible and with meeting the summed mass pressure limit, and that vacuum baking is preferred over air baking because it allows an RGA scan of the load. Processed per LIGO-E960159-01-V. Small O-rings under 8 inches diameter with a cross section at or below 0.275 inch are baked at 120 C for 48 hours instead. OWNER RULING, lot 03. The slug is set to null. The material_verbatim of this entry names no polymer, and std-elastomers is the card of the Buna-N and EPDM elastomers, which is banned. Its sibling entry pr-ligo-fluoro-bake names Fluorel and Viton and carries the viton card. An affirmative attachment that is wrong is worse than a declared absence.", "_source": "S-LIGO-E960022-V24", "contradictions": [] }, { "id": "pr-ligo-indium-bake", "slug": "indium", "grade": null, "material_verbatim": "Indium, pure", "class": "procedure", "procedure_kind": "bakeout", "bake": { "temp_C": 120, "hours": 48, "atmosphere": "vacuum", "_source": "S-LIGO-E960022-V24" }, "conditions": "Section 13.14. Prescribed clean and bake condition, not a measurement. The document states the procedures are consistent with baking a material at the maximum temperature possible and with meeting the summed mass pressure limit, and that vacuum baking is preferred over air baking because it allows an RGA scan of the load. The document restricts this temperature to pure indium, melting point 156 C, and not to low temperature indium solders. Ultrasonic cleaning in acetone precedes the bake.", "_source": "S-LIGO-E960022-V24", "contradictions": [] }, { "id": "pr-ligo-ndfeb-bake", "slug": null, "grade": null, "material_verbatim": "NdFeB magnets, NEO 35", "class": "procedure", "procedure_kind": "bakeout", "bake": { "temp_C": 80, "hours": 48, "atmosphere": "vacuum", "_source": "S-LIGO-E960022-V24" }, "conditions": "Section 13.21.1. Prescribed clean and bake condition, not a measurement. The document states the procedures are consistent with baking a material at the maximum temperature possible and with meeting the summed mass pressure limit, and that vacuum baking is preferred over air baking because it allows an RGA scan of the load.", "_source": "S-LIGO-E960022-V24", "contradictions": [] }, { "id": "pr-ligo-smco-bake", "slug": null, "grade": null, "material_verbatim": "Samarium-cobalt permanent magnets", "class": "procedure", "procedure_kind": "bakeout", "bake": { "temp_C": 177, "hours": 96, "atmosphere": "vacuum", "_source": "S-LIGO-E960022-V24" }, "conditions": "Section 13.21.3. Prescribed clean and bake condition, not a measurement. The document states the procedures are consistent with baking a material at the maximum temperature possible and with meeting the summed mass pressure limit, and that vacuum baking is preferred over air baking because it allows an RGA scan of the load.", "_source": "S-LIGO-E960022-V24", "contradictions": [] }, { "id": "pr-ligo-feedthrough-bake", "slug": null, "grade": null, "material_verbatim": "Electrical vacuum feedthroughs", "class": "procedure", "procedure_kind": "bakeout", "bake": { "temp_C": 150, "hours": 48, "atmosphere": "vacuum", "_source": "S-LIGO-E960022-V24" }, "conditions": "Section 13.27.3. Prescribed clean and bake condition, not a measurement. The document states the procedures are consistent with baking a material at the maximum temperature possible and with meeting the summed mass pressure limit, and that vacuum baking is preferred over air baking because it allows an RGA scan of the load. The oven must be programmed to ramp up and down through 120 C over 6 hours, that is 20 degrees per hour, and forced cooling is forbidden with feedthroughs in the load. Leak check before and after.", "_source": "S-LIGO-E960022-V24", "contradictions": [] }, { "id": "rq-ligo-hc-rga-threshold", "slug": null, "grade": null, "material_verbatim": "any part qualified by vacuum bake and RGA scan for LIGO UHV service", "class": "requirement", "species": "HC", "value": { "_source": "S-LIGO-E960022-V24", "as_printed": { "value": "2e-12", "unit_printed": "torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.66645e-12 }, "conditions": "Section 13.17.2.1. Acceptance criterion for the RGA measurement taken after the vacuum bake, published as 2e-12 torr-liters/cm2/s for the sum of AMU components 41, 43, 53, 55 and 57, converted to the canonical unit at build by the exact definition of the units. A threshold to be met, not a measured rate. If the criterion is not met the document requires re-baking for another 24 hours and repeating the analysis until it is. The species is defined by the five named masses, which are hydrocarbon fragments, the document states LIGO screens on hydrocarbon outgassing rather than total outgassing because the risk is optical contamination and forward-scattering phase noise, and that the amount outgassed matters less than the species.", "_source": "S-LIGO-E960022-V24", "contradictions": [] }, { "id": "rq-ligo-hc-suspension-total", "slug": null, "grade": null, "material_verbatim": "a single suspension structure qualified by RGA for the LIGO UHV", "class": "requirement", "species": "HC", "value": { "q_total_mbar_l_s": 5.33289e-10, "_source": "S-LIGO-E080177-V2" }, "conditions": "Section 6c, published as at most 4e-10 torr-liter/sec for the calibrated outgassing rate of the cracked hydrocarbon signature, the sum of AMU 41, 43, 53, 55 and 57, for a single suspension structure. Converted by the exact definition of the torr, 101325/76000 mbar to the torr. This is a total throughput and not a specific rate: the source writes torr-liter/sec with no area. Footnote 1 of the source states that high molecular weight hydrocarbons crack into lower AMU components in a mass spectrometer and that these five masses were found to be indicative of all high molecular weight hydrocarbons.", "_source": "S-LIGO-E080177-V2", "contradictions": [] }, { "id": "rq-ligo-hc-background-floor", "slug": null, "grade": null, "material_verbatim": "a small quantity of material occupying the vacuum bake oven", "class": "requirement", "species": "HC", "value": { "q_total_mbar_l_s": 2.66645e-12, "bound": "approx", "_source": "S-LIGO-E080177-V2" }, "conditions": "Section 6d, published as background limited at about 2e-12 torr-liter/sec for the hydrocarbon signature when a small quantity of material occupies the oven. Converted by the exact definition of the torr, 101325/76000 mbar to the torr. A measurement floor, not a material property: below it the scan is reading the apparatus.", "_source": "S-LIGO-E080177-V2", "contradictions": [] }, { "id": "rq-ligo-rga-peak-ratios", "slug": null, "grade": null, "material_verbatim": "any RGA scan submitted for approval of a LIGO UHV part", "class": "requirement", "species": "HC", "criterion": "The 43 AMU peak is at most one tenth of the 44 AMU peak, and every peak above 44 AMU is at most one hundredth of the 44 AMU peak.", "conditions": "Section 6a and 6b. The source adds that no significant high AMU component may sit above the background or instrument noise floor up to AMU 100, even if it is below one hundredth of AMU 44. These are shape criteria on the spectrum, read without any calibration, and they sit alongside the calibrated rate criterion rather than replacing it.", "_source": "S-LIGO-E080177-V2", "contradictions": [] }, { "id": "pr-ligo-rga-measurement", "slug": null, "grade": null, "material_verbatim": "RGA outgassing measurement of a cleaned and vacuum baked component", "class": "procedure", "procedure_kind": "measurement", "conditions": "Section 5 and 6 of the source. The parts are cleaned, baked in vacuum, and allowed to cool to room temperature before the scan. A large turbo pump removes the outgassed contaminants during the bake, once chamber and parts have cooled, a smaller turbo pump is used deliberately to raise the background pressure due to the parts so that the rate can be measured. The base pressure during the measurement is at most 1e-6 torr. The chamber must not be significantly larger in area or volume than needed to fit the parts, otherwise deposition on the chamber walls dominates the effective pumping rate and masks the outgassing of the parts. Subtraction of an empty chamber spectrum is not permitted. Every scan must have a recent empty chamber scan, which must show no peaks above the noise floor at AMU 41, 43 and above 44, and a calibration by a multi-component calibrated leak including argon at AMU 40 and krypton at AMU 85, 86 and 87.", "_source": "S-LIGO-E080177-V2", "contradictions": [] }, { "id": "rq-ligo-nvr-particulate", "slug": null, "grade": null, "material_verbatim": "piece parts before clean assembly for LIGO UHV service", "class": "requirement", "species": null, "criterion": "Non-volatile residue level A/50 or better and particulate cleanliness level 50 or better, per MIL-STD-1246C or IEST-STD-CC1246D.", "conditions": "Section 10.1, repeated by the source from section 6.1 of LIGO-E010613. The source states RGA testing is the preferred way of verifying non-volatile residue cleanliness because it measures the outgassing directly, that every part fitting a vacuum bake oven below 1e-6 torr undergoes it, and that parts too large are FTIR tested and then air baked. It cites E080177-v1 as the method, one version behind the E080177-v2 read for this base.", "_source": "S-LIGO-E1000088-V1", "contradictions": [] }, { "id": "rq-iter-vqc1-impurities", "slug": null, "grade": null, "material_verbatim": "any material used on an ITER vacuum system of class VQC 1", "class": "requirement", "species": "impurities", "measurement": { "method": "stated", "temp_C": 100, "pumping_time_h": "steady-state" }, "value": { "_source": "S-ITER-ITR-19-004", "as_printed": { "value": "1e-09", "unit_printed": "Pa.m3.s-1.m-2", "unit": "pa_m3_s_m2" }, "q_mbar_l_s_cm2": 1e-12 }, "conditions": "Table 5-1, maximum steady state outgassing rate, published as 1e-09 Pa.m3.s-1.m-2 at an outgas test temperature of 100 C. Converted at build by the exact definition of the units. The source states these limits were produced by taking into account the total surface area expected, the available pumping speed, the desired pressure and the post assembly conditioning time, with due consideration of what is reasonably achievable, and that adding novel high surface area components requires specific acceptance. An outgassing rate acceptance test is required for all VQC 1 components. This is the torus primary vacuum limit on impurities. The test temperature may be reduced to 20 C for components that normally operate at cryogenic temperatures.", "_source": "S-ITER-ITR-19-004", "contradictions": [] }, { "id": "rq-iter-vqc1-hydrogen", "slug": null, "grade": null, "material_verbatim": "any material used on an ITER vacuum system of class VQC 1", "class": "requirement", "species": "hydrogen isotopes", "measurement": { "method": "stated", "temp_C": 100, "pumping_time_h": "steady-state" }, "value": { "_source": "S-ITER-ITR-19-004", "as_printed": { "value": "1e-07", "unit_printed": "Pa.m3.s-1.m-2", "unit": "pa_m3_s_m2" }, "q_mbar_l_s_cm2": 1e-10 }, "conditions": "Table 5-1, maximum steady state outgassing rate, published as 1e-07 Pa.m3.s-1.m-2 at an outgas test temperature of 100 C. Converted at build by the exact definition of the units. The source states these limits were produced by taking into account the total surface area expected, the available pumping speed, the desired pressure and the post assembly conditioning time, with due consideration of what is reasonably achievable, and that adding novel high surface area components requires specific acceptance. An outgassing rate acceptance test is required for all VQC 1 components. Hydrogen isotopes are given their own column, two orders of magnitude above the impurity limit, because they are the working gas and not a contaminant.", "_source": "S-ITER-ITR-19-004", "contradictions": [] }, { "id": "rq-iter-vqc2", "slug": null, "grade": null, "material_verbatim": "any material used on an ITER vacuum system of class VQC 2", "class": "requirement", "species": "impurities", "measurement": { "method": "stated", "temp_C": 20, "pumping_time_h": "steady-state" }, "value": { "_source": "S-ITER-ITR-19-004", "as_printed": { "value": "1e-07", "unit_printed": "Pa.m3.s-1.m-2", "unit": "pa_m3_s_m2" }, "q_mbar_l_s_cm2": 1e-10 }, "conditions": "Table 5-1, maximum steady state outgassing rate, published as 1e-07 Pa.m3.s-1.m-2 at an outgas test temperature of 20 C. Converted at build by the exact definition of the units. The source states these limits were produced by taking into account the total surface area expected, the available pumping speed, the desired pressure and the post assembly conditioning time, with due consideration of what is reasonably achievable, and that adding novel high surface area components requires specific acceptance. An outgassing rate acceptance test is required for all VQC 1 components. Cryostat primary vacuum. For VQC 2, 3 and 4 the rate excludes the partial rates for water and hydrogen. For magnet resins the source states this target is considered achievable but that a factor of 10 increase will be permitted as an acceptance criterion.", "_source": "S-ITER-ITR-19-004", "contradictions": [] }, { "id": "rq-iter-vqc3", "slug": null, "grade": null, "material_verbatim": "any material used on an ITER vacuum system of class VQC 3", "class": "requirement", "species": "impurities", "measurement": { "method": "stated", "temp_C": 20, "pumping_time_h": "steady-state" }, "value": { "_source": "S-ITER-ITR-19-004", "as_printed": { "value": "1e-08", "unit_printed": "Pa.m3.s-1.m-2", "unit": "pa_m3_s_m2" }, "q_mbar_l_s_cm2": 1e-11 }, "conditions": "Table 5-1, maximum steady state outgassing rate, published as 1e-08 Pa.m3.s-1.m-2 at an outgas test temperature of 20 C. Converted at build by the exact definition of the units. The source states these limits were produced by taking into account the total surface area expected, the available pumping speed, the desired pressure and the post assembly conditioning time, with due consideration of what is reasonably achievable, and that adding novel high surface area components requires specific acceptance. An outgassing rate acceptance test is required for all VQC 1 components. Interspaces and auxiliary vacuum systems connected to the service vacuum system or roughing lines. The tightest of the room temperature classes.", "_source": "S-ITER-ITR-19-004", "contradictions": [] }, { "id": "rq-iter-vqc4", "slug": null, "grade": null, "material_verbatim": "any material used on an ITER vacuum system of class VQC 4", "class": "requirement", "species": "impurities", "measurement": { "method": "stated", "temp_C": 20, "pumping_time_h": "steady-state" }, "value": { "_source": "S-ITER-ITR-19-004", "as_printed": { "value": "1e-07", "unit_printed": "Pa.m3.s-1.m-2", "unit": "pa_m3_s_m2" }, "q_mbar_l_s_cm2": 1e-10 }, "conditions": "Table 5-1, maximum steady state outgassing rate, published as 1e-07 Pa.m3.s-1.m-2 at an outgas test temperature of 20 C. Converted at build by the exact definition of the units. The source states these limits were produced by taking into account the total surface area expected, the available pumping speed, the desired pressure and the post assembly conditioning time, with due consideration of what is reasonably achievable, and that adding novel high surface area components requires specific acceptance. An outgassing rate acceptance test is required for all VQC 1 components. Cryogenic guard vacuum. The only class for which the source accepts published data and conformity to a clean work plan in place of a test.", "_source": "S-ITER-ITR-19-004", "contradictions": [] }, { "id": "rq-iter-cables-vqc1", "slug": null, "grade": null, "material_verbatim": "cables for use in the ITER vacuum, VQC 1, up to 5 mm outer sleeve diameter", "class": "requirement", "species": "impurities", "measurement": { "method": "stated", "temp_C": 100, "pumping_time_h": "steady-state" }, "value": { "q_per_length_mbar_l_s_m": 1e-11, "_source": "S-ITER-ITR-19-004" }, "conditions": "Table 20-1, maximum steady state outgassing rate per unit length, published as 1e-11 Pa.m3.s-1.m-1. This is a rate per metre of cable, not per square centimetre of surface: the unit has a length in the denominator, not an area, and it is stored in its own field. The hydrogen isotope limit on the same row is 1e-9. Pro-rata values apply above 5 mm diameter. The source anticipates up to 80 km of cable in the vacuum vessel and several kilometres more in the cryostat, which is why cables get their own table.", "_source": "S-ITER-ITR-19-004", "contradictions": [] }, { "id": "rq-iter-cfc-conditioning", "slug": null, "grade": null, "material_verbatim": "carbon fibre composites after vacuum conditioning", "class": "requirement", "species": "impurities", "measurement": { "method": "stated", "temp_C": 200, "pumping_time_h": "steady-state" }, "value": { "q_per_volume_mbar_l_s_cm3": null, "published": "1e-6 Pa.m3.s-1.m-3", "_source": "S-ITER-ITR-19-004" }, "conditions": "Section 26.7. The total outgassing rate of carbon fibre composites after baking shall be below 1e-6 Pa.m3.s-1.m-3 at 200 C, excluding the partial rates for H2, CO and CO2. The denominator is a volume, not an area: this is a rate per cubic metre of material, and it cannot be compared with any surface rate in this base. No conversion is written for that reason. The source requires CFC subcomponents to be baked before assembly because of their high temperature requirement.", "_source": "S-ITER-ITR-19-004", "contradictions": [] }, { "id": "pr-iter-bake-vqc1-plasma-facing", "slug": null, "grade": null, "material_verbatim": "VQC 1 component materials in proximity to the plasma, within 0.25 m", "class": "procedure", "procedure_kind": "bakeout", "bake": { "temp_C": null, "hours": 24, "atmosphere": "vacuum", "_source": "S-ITER-ITR-19-004" }, "conditions": "Table 26-1, normal vacuum baking temperature by material for VQC 1 components facing or within 0.25 m of the plasma: beryllium 350 C, stainless steel all grades 250 C, carbon composites 450 or 2000 C, precipitation-hardened copper alloys 250 C, tungsten 350 C. A 250 C cycle of substantially increased duration may be permitted for beryllium on approval. The maximum temperature for a complete system may be limited by its components. Where a temperature is too high for a composite assembly, the part needing the higher bake is baked at that temperature before assembly and the complete assembly is then baked at the lowest listed temperature of its parts. The ramp from ambient to the bake temperature shall normally take less than 100 hours and the hold shall normally be at least 24 hours. Vacuum ovens with heating filaments inside the vacuum are not permitted for VQC 1 without full qualification of the process.", "_source": "S-ITER-ITR-19-004", "contradictions": [] }, { "id": "rq-iter-surface-and-cleanliness", "slug": null, "grade": null, "material_verbatim": "VQC 1 metallic components and the areas where they are handled", "class": "requirement", "species": null, "criterion": "Maximum average surface roughness Ra 6.3 micrometres for VQC 1 and 12.5 for VQC 2, 3 and 4, measured by electric stylus per ISO 4287:2000. Airborne particulate count in VQC 1 handling areas not to exceed 5e6 particles larger than 0.5 micrometre per cubic metre. Cutting fluids for VQC 1 and 3 to be water soluble, non-halogenated, with at most 200 ppm each of halogens, phosphorus and sulphur.", "conditions": "Sections 8.1, 24.5 and 6.1.2. Halogenated solvents are forbidden at any stage for VQC 1 and 3. Seal faces shall not be electropolished. Abrasive cleaning, files, sand, shot and dry bead blasting and polishing pastes are prohibited under normal circumstances for all classes, with shot and dry bead blasting permitted for VQC 2 only. The source notes that thermal outgassing from pickled or passivated surfaces may well be greater than from a native metal surface and that baking may then be required.", "_source": "S-ITER-ITR-19-004", "contradictions": [] }, { "id": "og-elsey-t4-1-aluminium-fresh", "slug": "aluminum-6061", "grade": null, "material_verbatim": "Aluminium (fresh)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "fresh", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 63 x 1e-10 and K10 6.0 x 1e-10. Slopes of the log log plot as printed, alpha1 1.0 and alpha10 1.0. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "63", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 8.39931e-9 }, { "t_h": 10, "as_printed": { "value": "6.0", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 7.99934e-10 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-2-aluminium-degassed-24-h", "slug": "aluminum-6061", "grade": null, "material_verbatim": "Aluminium (degassed 24 h)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "degassed 24 h", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 41.4 x 1e-10 and K10 3.06 x 1e-10. Slopes of the log log plot as printed, alpha1 3.2 and alpha10 0.9. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "41.4", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 5.51955e-9 }, { "t_h": 10, "as_printed": { "value": "3.06", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 4.07966e-10 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-3-aluminium-3-h-in-air", "slug": "aluminum-6061", "grade": null, "material_verbatim": "Aluminium (3 h in air)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "3 h in air", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 66.5 x 1e-10 and K10 4.75 x 1e-10. Slopes of the log log plot as printed, alpha1 1.9 and alpha10 0.9. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "66.5", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 8.86594e-9 }, { "t_h": 10, "as_printed": { "value": "4.75", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 6.33281e-10 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-4-aluminium-fresh", "slug": "aluminum-6061", "grade": null, "material_verbatim": "Aluminium (fresh)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "fresh", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 62 x 1e-10 and K10 3.25 x 1e-10. Slopes of the log log plot as printed, alpha1 1.0 and alpha10 0.9. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "62", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 8.26599e-9 }, { "t_h": 10, "as_printed": { "value": "3.25", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 4.33298e-10 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-5-aluminium-anodised-2-um-pores", "slug": "anodized-al-uhv", "grade": null, "material_verbatim": "Aluminium (anodised-2 um pores)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "anodised-2 um pores", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 2760 x 1e-10 and K10 322 x 1e-10. Slopes of the log log plot as printed, alpha1 0.9 and alpha10 0.9. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "2760", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 3.6797e-7 }, { "t_h": 10, "as_printed": { "value": "322", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 4.29298e-8 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-6-aluminium-bright-rolled", "slug": "aluminum-6061", "grade": null, "material_verbatim": "Aluminium (bright rolled)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "bright rolled", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": 10 }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K10 75 x 1e-10. Slopes of the log log plot as printed, alpha1 not printed and alpha10 1. The table credits this row to reference 13 of the source, B B Dayton, Trans 6th AVS Symp, p 101, 1959. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. The source prints no value at the other pumping time of this table.", "contradictions": [], "value": { "_source": "S-ELSEY-1975-II", "as_printed": { "value": "7.5e-9", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 9.99918e-9 } }, { "id": "og-elsey-t4-7-duralumin", "slug": null, "grade": null, "material_verbatim": "Duralumin", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 1700 x 1e-10 and K10 350 x 1e-10. Slopes of the log log plot as printed, alpha1 0.75 and alpha10 0.75. The table credits this row to reference 13 of the source, B B Dayton, Trans 6th AVS Symp, p 101, 1959. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. Duralumin is a 2000 series aluminium copper alloy. The Matter card aluminum-6061 covers 6061, 6063 and 5083 only.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "1700", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.26648e-7 }, { "t_h": 10, "as_printed": { "value": "350", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 4.66628e-8 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-8-brass-wave-guide", "slug": "zinc-brass", "grade": null, "material_verbatim": "Brass (wave-guide)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "wave-guide", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 4000 x 1e-10 and K10 100 x 1e-10. Slopes of the log log plot as printed, alpha1 2.0 and alpha10 1.2. The table credits this row to reference 13 of the source, B B Dayton, Trans 6th AVS Symp, p 101, 1959. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "4000", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 5.33289e-7 }, { "t_h": 10, "as_printed": { "value": "100", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.33322e-8 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-9-copper-fresh", "slug": "copper-ofe", "grade": null, "material_verbatim": "Copper (fresh)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "fresh", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 400 x 1e-10 and K10 41.5 x 1e-10. Slopes of the log log plot as printed, alpha1 1.0 and alpha10 1.0. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "400", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 5.33289e-8 }, { "t_h": 10, "as_printed": { "value": "41.5", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 5.53288e-9 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-10-copper-mech-polished", "slug": "copper-ofe", "grade": null, "material_verbatim": "Copper (mech. polished)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "mech. polished", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 35 x 1e-10 and K10 3.56 x 1e-10. Slopes of the log log plot as printed, alpha1 1.0 and alpha10 1.0. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "35", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 4.66628e-9 }, { "t_h": 10, "as_printed": { "value": "3.56", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 4.74628e-10 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-11-ofhc-copper-fresh", "slug": "copper-ofe", "grade": null, "material_verbatim": "OFHC copper (fresh)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "fresh", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 188 x 1e-10 and K10 12.6 x 1e-10. Slopes of the log log plot as printed, alpha1 1.3 and alpha10 1.3. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "188", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.50646e-8 }, { "t_h": 10, "as_printed": { "value": "12.6", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.67986e-9 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-12-ofhc-copper-mech-polished", "slug": "copper-ofe", "grade": null, "material_verbatim": "OFHC copper (mech. polished)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "mech. polished", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 19 x 1e-10 and K10 1.63 x 1e-10. Slopes of the log log plot as printed, alpha1 1.1 and alpha10 1.1. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "19", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.53312e-9 }, { "t_h": 10, "as_printed": { "value": "1.63", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.17315e-10 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-13-gold-wire-fresh", "slug": null, "grade": null, "material_verbatim": "Gold (wire fresh)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "wire fresh", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 1580 x 1e-10 and K10 5.1 x 1e-10. Slopes of the log log plot as printed, alpha1 2.1 and alpha10 1. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. No gold card exists among the 85 Matter cards.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "1580", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.10649e-7 }, { "t_h": 10, "as_printed": { "value": "5.1", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 6.79944e-10 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-14-mild-steel", "slug": "mild-steel", "grade": null, "material_verbatim": "Mild steel", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 5400 x 1e-10 and K10 500 x 1e-10. Slopes of the log log plot as printed, alpha1 1 and alpha10 1. The table credits this row to reference 13 of the source, B B Dayton, Trans 6th AVS Symp, p 101, 1959. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "5400", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 7.19941e-7 }, { "t_h": 10, "as_printed": { "value": "500", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 6.66612e-8 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-15-mild-steel-slightly-rusty", "slug": "mild-steel", "grade": null, "material_verbatim": "Mild steel (slightly rusty)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "slightly rusty", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 6000 x 1e-10 and K10 130 x 1e-10. Slopes of the log log plot as printed, alpha1 3.1 and alpha10 1. The table credits this row to reference 13 of the source, B B Dayton, Trans 6th AVS Symp, p 101, 1959. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Internal inconsistency of the source, signalled and not corrected. The two published rates give a log log slope of 1.66 over the interval, while the printed slopes are 3.1 and 1. Both rates were read twice, from the text layer and from a 400 dpi raster, and agree. A slope is a local quantity and need not equal the average, but here it differs from both printed values.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "6000", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 7.99934e-7 }, { "t_h": 10, "as_printed": { "value": "130", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.73319e-8 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-16-mild-steel-chromium-plated-polished", "slug": null, "grade": null, "material_verbatim": "Mild steel (chromium plated polished)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "chromium plated polished", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 100 x 1e-10 and K10 9.0 x 1e-10. Slopes of the log log plot as printed, alpha1 1 and alpha10 not printed. The table credits this row to reference 13 of the source, B B Dayton, Trans 6th AVS Symp, p 101, 1959. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. A chromium plated steel. The Matter card mild-steel describes bare mild steel and cast iron, and no chromium plating card exists.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "100", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.33322e-8 }, { "t_h": 10, "as_printed": { "value": "9.0", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.1999e-9 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-17-mild-steel-aluminium-spray-coated", "slug": null, "grade": null, "material_verbatim": "Mild steel (aluminium spray coated)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "aluminium spray coated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 600 x 1e-10 and K10 100 x 1e-10. Slopes of the log log plot as printed, alpha1 0.75 and alpha10 0.75. The table credits this row to reference 13 of the source, B B Dayton, Trans 6th AVS Symp, p 101, 1959. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. An aluminium sprayed steel. The Matter card mild-steel describes bare mild steel, and the outgassing surface here is the sprayed aluminium.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "600", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 7.99934e-8 }, { "t_h": 10, "as_printed": { "value": "100", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.33322e-8 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-18-steel-chromium-plated-fresh", "slug": null, "grade": null, "material_verbatim": "Steel (chromium plated fresh)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "chromium plated fresh", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 70.5 x 1e-10 and K10 5.8 x 1e-10. Slopes of the log log plot as printed, alpha1 1 and alpha10 1. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. No chromium plating card exists among the 85 Matter cards.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "70.5", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 9.39923e-9 }, { "t_h": 10, "as_printed": { "value": "5.8", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 7.7327e-10 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-19-steel-chromium-plated-polished", "slug": null, "grade": null, "material_verbatim": "Steel (chromium plated polished)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "chromium plated polished", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 91 x 1e-10 and K10 8.0 x 1e-10. Slopes of the log log plot as printed, alpha1 1 and alpha10 1. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. No chromium plating card exists among the 85 Matter cards.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "91", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.21323e-8 }, { "t_h": 10, "as_printed": { "value": "8.0", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.06658e-9 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-20-steel-nickel-plated-fresh", "slug": "nickel-systems", "grade": null, "material_verbatim": "Steel (nickel plated fresh)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "nickel plated fresh", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 42.4 x 1e-10 and K10 4.94 x 1e-10. Slopes of the log log plot as printed, alpha1 0.9 and alpha10 0.9. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "42.4", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 5.65287e-9 }, { "t_h": 10, "as_printed": { "value": "4.94", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 6.58612e-10 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-21-steel-nickel-plated", "slug": "nickel-systems", "grade": null, "material_verbatim": "Steel (nickel plated)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "nickel plated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 27.6 x 1e-10 and K10 2.33 x 1e-10. Slopes of the log log plot as printed, alpha1 1.1 and alpha10 1.1. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "27.6", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 3.6797e-9 }, { "t_h": 10, "as_printed": { "value": "2.33", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 3.10641e-10 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-22-steel-chemically-nickel-plated-fresh", "slug": "nickel-systems", "grade": null, "material_verbatim": "Steel (chemically nickel plated fresh)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "chemically nickel plated fresh", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 83 x 1e-10 and K10 7.05 x 1e-10. Slopes of the log log plot as printed, alpha1 1 and alpha10 1. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "83", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.10658e-8 }, { "t_h": 10, "as_printed": { "value": "7.05", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 9.39923e-10 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-23-steel-chemically-nickel-plated-polished", "slug": "nickel-systems", "grade": null, "material_verbatim": "Steel (chemically nickel plated polished)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "chemically nickel plated polished", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 52.2 x 1e-10 and K10 4.6 x 1e-10. Slopes of the log log plot as printed, alpha1 1 and alpha10 1. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "52.2", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 6.95943e-9 }, { "t_h": 10, "as_printed": { "value": "4.6", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 6.13283e-10 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-24-steel-descaled", "slug": null, "grade": null, "material_verbatim": "Steel (descaled)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "descaled", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 3070 x 1e-10 and K10 2950 x 1e-10. Slopes of the log log plot as printed, alpha1 0.6 and alpha10 0.7. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. An unqualified descaled steel. Neither the grade nor the surface state places it on a Matter card. Internal inconsistency of the source, signalled and not corrected. The two published rates give a log log slope of 0.02 over the interval, while the printed slopes are 0.6 and 0.7. Both rates were read twice, from the text layer and from a 400 dpi raster, and agree. A slope is a local quantity and need not equal the average, but here it differs from both printed values.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "3070", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 4.093e-7 }, { "t_h": 10, "as_printed": { "value": "2950", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 3.93301e-7 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-25-molybdenum", "slug": "moly-tzm", "grade": null, "material_verbatim": "Molybdenum", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 52 x 1e-10 and K10 3.67 x 1e-10. Slopes of the log log plot as printed, alpha1 1.0 and alpha10 1. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "52", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 6.93276e-9 }, { "t_h": 10, "as_printed": { "value": "3.67", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 4.89293e-10 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-26-stainless-steel-en58b", "slug": null, "grade": null, "material_verbatim": "Stainless Steel EN58B", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": 10 }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K10 14 x 1e-10. Slopes of the log log plot as printed, alpha1 not printed and alpha10 1.6. The table credits this row to reference 13 of the source, B B Dayton, Trans 6th AVS Symp, p 101, 1959. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. The source prints no value at the other pumping time of this table. Slug left null. EN58B is a British Standard designation the source does not expand. The composition is not printed, so the card cannot be resolved from the string.", "contradictions": [], "value": { "_source": "S-ELSEY-1975-II", "as_printed": { "value": "1.4e-9", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.86651e-9 } }, { "id": "og-elsey-t4-27-stainless-steel-18-9-1-electro-polished", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Stainless Steel 18/9/1 (electro polished)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "electro polished", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": 10 }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K10 2 x 1e-10. Slopes of the log log plot as printed, alpha1 not printed and alpha10 not printed. The table credits this row to reference 15 of the source, R S Barton and R P Govier, Proc 4th Int Vac Cong, p 775, 1968, and Vacuum, 20, 1970, 1. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. The source prints no value at the other pumping time of this table.", "contradictions": [], "value": { "_source": "S-ELSEY-1975-II", "as_printed": { "value": "2e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.66645e-10 } }, { "id": "og-elsey-t4-28-stainless-steel-18-9-1-vapour-degreased", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Stainless Steel 18/9/1 (vapour degreased)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "vapour degreased", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": 10 }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K10 1 x 1e-10. Slopes of the log log plot as printed, alpha1 not printed and alpha10 not printed. The table credits this row to reference 15 of the source, R S Barton and R P Govier, Proc 4th Int Vac Cong, p 775, 1968, and Vacuum, 20, 1970, 1. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. The source prints no value at the other pumping time of this table.", "contradictions": [], "value": { "_source": "S-ELSEY-1975-II", "as_printed": { "value": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.33322e-10 } }, { "id": "og-elsey-t4-29-stainless-steel-18-9-1-diversey-cleaned", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Stainless Steel 18/9/1 (diversey cleaned)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "diversey cleaned", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": 10 }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K10 3 x 1e-10. Slopes of the log log plot as printed, alpha1 not printed and alpha10 not printed. The table credits this row to reference 15 of the source, R S Barton and R P Govier, Proc 4th Int Vac Cong, p 775, 1968, and Vacuum, 20, 1970, 1. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. The source prints no value at the other pumping time of this table.", "contradictions": [], "value": { "_source": "S-ELSEY-1975-II", "as_printed": { "value": "3e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 3.99967e-10 } }, { "id": "og-elsey-t4-30-stainless-steel", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Stainless steel", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 1750 x 1e-10 and K10 210 x 1e-10. Slopes of the log log plot as printed, alpha1 1.1 and alpha10 0.75. The table credits this row to reference 13 of the source, B B Dayton, Trans 6th AVS Symp, p 101, 1959. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "1750", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.33314e-7 }, { "t_h": 10, "as_printed": { "value": "210", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.79977e-8 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-31-stainless-steel", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Stainless steel", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 900 x 1e-10 and K10 200 x 1e-10. Slopes of the log log plot as printed, alpha1 0.7 and alpha10 0.75. The table credits this row to reference 13 of the source, B B Dayton, Trans 6th AVS Symp, p 101, 1959. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "900", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.1999e-7 }, { "t_h": 10, "as_printed": { "value": "200", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.66645e-8 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-32-stainless-steel-icn-472-fresh", "slug": null, "grade": null, "material_verbatim": "Stainless steel ICN 472 (fresh)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "fresh", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 135 x 1e-10 and K10 14.7 x 1e-10. Slopes of the log log plot as printed, alpha1 0.9 and alpha10 0.9. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. ICN 472 is a proprietary designation the source does not expand. The composition is not printed.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "135", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.79985e-8 }, { "t_h": 10, "as_printed": { "value": "14.7", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.95984e-9 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-33-stainless-steel-icn-472-sanded", "slug": null, "grade": null, "material_verbatim": "Stainless steel ICN 472 (sanded)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "sanded", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 82.8 x 1e-10 and K10 10.4 x 1e-10. Slopes of the log log plot as printed, alpha1 1.2 and alpha10 0.8. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. ICN 472 is a proprietary designation the source does not expand. The composition is not printed.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "82.8", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.10391e-8 }, { "t_h": 10, "as_printed": { "value": "10.4", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.38655e-9 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-34-stainless-steel-ns22s-mech-polished", "slug": null, "grade": null, "material_verbatim": "Stainless Steel NS22S (mech. polished)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "mech. polished", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 17.1 x 1e-10 and K10 4.6 x 1e-10. Slopes of the log log plot as printed, alpha1 0.5 and alpha10 0.7. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. NS22S is a proprietary designation the source does not expand. The composition is not printed.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "17.1", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.27981e-9 }, { "t_h": 10, "as_printed": { "value": "4.6", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 6.13283e-10 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-35-stainless-steel-ns22s-electro-polished", "slug": null, "grade": null, "material_verbatim": "Stainless Steel NS22S (electro polished)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "electro polished", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 42.8 x 1e-10 and K10 4.28 x 1e-10. Slopes of the log log plot as printed, alpha1 1.0 and alpha10 1.0. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. NS22S is a proprietary designation the source does not expand. The composition is not printed.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "42.8", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 5.7062e-9 }, { "t_h": 10, "as_printed": { "value": "4.28", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 5.7062e-10 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-36-stainless-steel-ns22s", "slug": null, "grade": null, "material_verbatim": "Stainless Steel NS22S", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 144 x 1e-10 and K10 13.5 x 1e-10. Slopes of the log log plot as printed, alpha1 1.3 and alpha10 1.9. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. NS22S is a proprietary designation the source does not expand. The composition is not printed.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "144", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.91984e-8 }, { "t_h": 10, "as_printed": { "value": "13.5", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.79985e-9 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-37-zinc", "slug": "zinc-brass", "grade": null, "material_verbatim": "Zinc", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 2210 x 1e-10 and K10 322 x 1e-10. Slopes of the log log plot as printed, alpha1 1.4 and alpha10 0.8. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "2210", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.94642e-7 }, { "t_h": 10, "as_printed": { "value": "322", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 4.29298e-8 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-38-titanium", "slug": "titanium", "grade": null, "material_verbatim": "Titanium", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 113 x 1e-10 and K10 18.4 x 1e-10. Slopes of the log log plot as printed, alpha1 0.6 and alpha10 1.1. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "113", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.50654e-8 }, { "t_h": 10, "as_printed": { "value": "18.4", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.45313e-9 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t4-39-titanium", "slug": "titanium", "grade": null, "material_verbatim": "Titanium", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 4 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 40 x 1e-10 and K10 3.68 x 1e-10. Slopes of the log log plot as printed, alpha1 1.0 and alpha10 1. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "40", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 5.33289e-9 }, { "t_h": 10, "as_printed": { "value": "3.68", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 4.90626e-10 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-40-araldite-moulded", "slug": null, "grade": null, "material_verbatim": "Araldite (moulded)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "moulded", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 116 x 1e-8 and K10 35.2 x 1e-8. Slopes of the log log plot as printed, alpha1 0.8 and alpha10 0.8. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. Araldite is a structural epoxy resin. The Matter card vacuum-epoxies describes vacuum rated epoxies of the Torr Seal class, which is a different qualification.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "116", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000154654 }, { "t_h": 10, "as_printed": { "value": "35.2", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 4.69295e-7 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-41-araldite-d", "slug": null, "grade": null, "material_verbatim": "Araldite D", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 800 x 1e-8 and K10 220 x 1e-8. Slopes of the log log plot as printed, alpha1 0.8 and alpha10 0.78. The table credits this row to reference 31 of the source, J Blears et al, Trans 1st IOVST Symp, 1960. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. Araldite is a structural epoxy resin, not a vacuum rated epoxy.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "800", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.0000106658 }, { "t_h": 10, "as_printed": { "value": "220", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000293309 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-42-araldite-d", "slug": null, "grade": null, "material_verbatim": "Araldite D", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 190 x 1e-8 and K10 125 x 1e-8. Slopes of the log log plot as printed, alpha1 0.3 and alpha10 0.5. The table credits this row to reference 4 of the source, R Geller, Le Vide, 13, No 74, 1958, 71. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. Araldite is a structural epoxy resin, not a vacuum rated epoxy.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "190", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000253312 }, { "t_h": 10, "as_printed": { "value": "125", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000166653 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-43-araldite-f", "slug": null, "grade": null, "material_verbatim": "Araldite F", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 150 x 1e-8 and K10 73 x 1e-8. Slopes of the log log plot as printed, alpha1 0.5 and alpha10 0.5. The table credits this row to reference 4 of the source, R Geller, Le Vide, 13, No 74, 1958, 71. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. Araldite is a structural epoxy resin, not a vacuum rated epoxy.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "150", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000199984 }, { "t_h": 10, "as_printed": { "value": "73", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 9.73253e-7 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-44-celluloid", "slug": null, "grade": null, "material_verbatim": "Celluloid", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 860 x 1e-8 and K10 430 x 1e-8. Slopes of the log log plot as printed, alpha1 0.5 and alpha10 0.5. The table credits this row to reference 32 of the source, R Jaeckel and F J Schitto, Gas Evolution from Materials in Vacuum, West Germany Ministry Research Report. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. No celluloid card exists among the 85 Matter cards.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "860", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.0000114657 }, { "t_h": 10, "as_printed": { "value": "430", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000573286 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-45-gaflon-ptfe-fresh", "slug": "ptfe", "grade": null, "material_verbatim": "Gaflon (PTFE) (fresh)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "PTFE) (fresh", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 16.6 x 1e-8 and K10 3.31 x 1e-8. Slopes of the log log plot as printed, alpha1 0.8 and alpha10 0.9. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "16.6", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.21315e-7 }, { "t_h": 10, "as_printed": { "value": "3.31", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 4.41297e-8 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-46-kel-f", "slug": null, "grade": null, "material_verbatim": "Kel-F", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 4 x 1e-8 and K10 1.7 x 1e-8. Slopes of the log log plot as printed, alpha1 0.57 and alpha10 0.53. The table credits this row to reference 33 of the source, B B Dayton, CVC Technical Report. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. Kel-F is polychlorotrifluoroethylene, a distinct fluoropolymer. The Matter card ptfe covers PTFE.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "4", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 5.33289e-8 }, { "t_h": 10, "as_printed": { "value": "1.7", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.26648e-8 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-47-methyl-methacrylate", "slug": "pvc-nylon", "grade": null, "material_verbatim": "Methyl methacrylate", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 420 x 1e-8 and K10 140 x 1e-8. Slopes of the log log plot as printed, alpha1 0.9 and alpha10 0.57. The table credits this row to reference 31 of the source, J Blears et al, Trans 1st IOVST Symp, 1960. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "420", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000559954 }, { "t_h": 10, "as_printed": { "value": "140", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000186651 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-48-mylar-24-h-at-95-percent-rh", "slug": null, "grade": null, "material_verbatim": "Mylar (24 h at 95 percent RH)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "24 h at 95 percent RH", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 230 x 1e-8 and K10 40 x 1e-8. Slopes of the log log plot as printed, alpha1 0.75 and alpha10 not printed. The table credits this row to reference 34 of the source, D J Santeler, Trans 5th AVS Symp, 1958. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. Mylar is polyethylene terephthalate. The Matter card pvc-nylon covers PVC, nylon and acrylic.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "230", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000306641 }, { "t_h": 10, "as_printed": { "value": "40", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 5.33289e-7 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-49-nylon", "slug": "pvc-nylon", "grade": null, "material_verbatim": "Nylon", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 1200 x 1e-8 and K10 600 x 1e-8. Slopes of the log log plot as printed, alpha1 0.5 and alpha10 0.5. The table credits this row to reference 35 of the source, B D Power and D J Crawley, Advances in Vacuum Science and Technology, Vol 1, p 206, Pergamon Press, Oxford, 1960. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "1200", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.0000159987 }, { "t_h": 10, "as_printed": { "value": "600", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000799934 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-50-pertinax", "slug": null, "grade": null, "material_verbatim": "Pertinax", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 620 x 1e-8 and K10 290 x 1e-8. Slopes of the log log plot as printed, alpha1 0.18 and alpha10 0.5. The table credits this row to reference 36 of the source, G Thieme, Vacuum, 13, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. Pertinax is a phenolic paper laminate. No card covers it.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "620", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000826599 }, { "t_h": 10, "as_printed": { "value": "290", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000386635 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-51-plexiglas", "slug": "pvc-nylon", "grade": null, "material_verbatim": "Plexiglas", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 72 x 1e-8 and K10 27 x 1e-8. Slopes of the log log plot as printed, alpha1 0.44 and alpha10 0.44. The table credits this row to reference 36 of the source, G Thieme, Vacuum, 13, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "72", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 9.59921e-7 }, { "t_h": 10, "as_printed": { "value": "27", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 3.5997e-7 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-52-plexiglas", "slug": "pvc-nylon", "grade": null, "material_verbatim": "Plexiglas", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 310 x 1e-8 and K10 180 x 1e-8. Slopes of the log log plot as printed, alpha1 0.4 and alpha10 0.4. The table credits this row to reference 4 of the source, R Geller, Le Vide, 13, No 74, 1958, 71. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "310", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000413299 }, { "t_h": 10, "as_printed": { "value": "180", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.0000023998 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-53-polyamid", "slug": "pvc-nylon", "grade": null, "material_verbatim": "Polyamid", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 460 x 1e-8 and K10 230 x 1e-8. Slopes of the log log plot as printed, alpha1 0.5 and alpha10 0.5. The table credits this row to reference 32 of the source, R Jaeckel and F J Schitto, Gas Evolution from Materials in Vacuum, West Germany Ministry Research Report. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "460", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000613283 }, { "t_h": 10, "as_printed": { "value": "230", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000306641 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-54-polyester-glass-laminate", "slug": null, "grade": null, "material_verbatim": "Polyester-glass laminate", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 250 x 1e-8 and K10 80 x 1e-8. Slopes of the log log plot as printed, alpha1 0.84 and alpha10 0.81. The table credits this row to reference 33 of the source, B B Dayton, CVC Technical Report. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. No polyester glass laminate card exists. The card cfrp-cyanate covers carbon fibre with cyanate ester resin, a different system.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "250", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000333306 }, { "t_h": 10, "as_printed": { "value": "80", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000106658 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-55-polyethylene", "slug": null, "grade": null, "material_verbatim": "Polyethylene", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 23 x 1e-8 and K10 11.5 x 1e-8. Slopes of the log log plot as printed, alpha1 0.5 and alpha10 0.5. The table credits this row to reference 32 of the source, R Jaeckel and F J Schitto, Gas Evolution from Materials in Vacuum, West Germany Ministry Research Report. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. No polyethylene card exists among the 85 Matter cards.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "23", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 3.06641e-7 }, { "t_h": 10, "as_printed": { "value": "11.5", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.53321e-7 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-56-polystyrene", "slug": null, "grade": null, "material_verbatim": "Polystyrene", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 2000 x 1e-8 and K10 200 x 1e-8. Slopes of the log log plot as printed, alpha1 1.6 and alpha10 1.6. The table credits this row to reference 33 of the source, B B Dayton, CVC Technical Report. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. No polystyrene card exists among the 85 Matter cards. Internal inconsistency of the source, signalled and not corrected. The two published rates give a log log slope of 1.00 over the interval, while the printed slopes are 1.6 and 1.6. Both rates were read twice, from the text layer and from a 400 dpi raster, and agree. A slope is a local quantity and need not equal the average, but here it differs from both printed values.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "2000", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.0000266645 }, { "t_h": 10, "as_printed": { "value": "200", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000266645 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-57-polystyrol", "slug": null, "grade": null, "material_verbatim": "Polystyrol", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 56 x 1e-8 and K10 12 x 1e-8. Slopes of the log log plot as printed, alpha1 0.6 and alpha10 0.61. The table credits this row to reference 36 of the source, G Thieme, Vacuum, 13, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. Polystyrol is the German name for polystyrene. No polystyrene card exists.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "56", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 7.46605e-7 }, { "t_h": 10, "as_printed": { "value": "12", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.59987e-7 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-58-polyvinylcarbazol", "slug": null, "grade": null, "material_verbatim": "Polyvinylcarbazol", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 160 x 1e-8 and K10 80 x 1e-8. Slopes of the log log plot as printed, alpha1 0.5 and alpha10 0.5. The table credits this row to reference 32 of the source, R Jaeckel and F J Schitto, Gas Evolution from Materials in Vacuum, West Germany Ministry Research Report. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. No polyvinylcarbazole card exists among the 85 Matter cards.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "160", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000213316 }, { "t_h": 10, "as_printed": { "value": "80", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000106658 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-59-ptfe", "slug": "ptfe", "grade": null, "material_verbatim": "PTFE", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 30 x 1e-8 and K10 15 x 1e-8. Slopes of the log log plot as printed, alpha1 0.45 and alpha10 0.56. The table credits this row to reference 13 of the source, B B Dayton, Trans 6th AVS Symp, p 101, 1959. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "30", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 3.99967e-7 }, { "t_h": 10, "as_printed": { "value": "15", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.99984e-7 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-60-pvc-24-h-at-95-percent-rh", "slug": "pvc-nylon", "grade": null, "material_verbatim": "PVC (24 h at 95 percent RH)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "24 h at 95 percent RH", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 85 x 1e-8 and K10 2 x 1e-8. Slopes of the log log plot as printed, alpha1 1.0 and alpha10 not printed. The table credits this row to reference 34 of the source, D J Santeler, Trans 5th AVS Symp, 1958. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Internal inconsistency of the source, signalled and not corrected. The two published rates give a log log slope of 1.63 over the interval, while the printed slopes are 1.0. Both rates were read twice, from the text layer and from a 400 dpi raster, and agree. A slope is a local quantity and need not equal the average, but here it differs from both printed values.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "85", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000113324 }, { "t_h": 10, "as_printed": { "value": "2", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.66645e-8 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-61-teflon", "slug": "ptfe", "grade": null, "material_verbatim": "Teflon", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 6.5 x 1e-8 and K10 2.5 x 1e-8. Slopes of the log log plot as printed, alpha1 0.5 and alpha10 0.2. The table credits this row to reference 36 of the source, G Thieme, Vacuum, 13, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "6.5", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 8.66595e-8 }, { "t_h": 10, "as_printed": { "value": "2.5", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 3.33306e-8 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t6-62-terephenil-fresh", "slug": null, "grade": null, "material_verbatim": "Terephenil (fresh)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "fresh", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 6 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 62.2 x 1e-8 and K10 16.8 x 1e-8. Slopes of the log log plot as printed, alpha1 0.5 and alpha10 0.5. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. Terephenil is printed as such by the source and is not a designation the corpus can place.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "62.2", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 8.29265e-7 }, { "t_h": 10, "as_printed": { "value": "16.8", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.23982e-7 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t7-63-butyl-dr41", "slug": null, "grade": null, "material_verbatim": "Butyl DR41", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 7 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 150 x 1e-8 and K4 40 x 1e-8. Slopes of the log log plot as printed, alpha1 0.68 and alpha4 0.64. The table credits this row to reference 31 of the source, J Blears et al, Trans 1st IOVST Symp, 1960. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. Butyl rubber. The Matter card std-elastomers covers Buna-N and EPDM, which butyl is neither.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "150", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000199984 }, { "t_h": 4, "as_printed": { "value": "40", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 5.33289e-7 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 4, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t7-64-convaseal", "slug": null, "grade": null, "material_verbatim": "Convaseal", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 7 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 100 x 1e-8 and K4 49 x 1e-8. Slopes of the log log plot as printed, alpha1 0.5 and alpha4 0.6. The table credits this row to reference 33 of the source, B B Dayton, CVC Technical Report. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. Convaseal is a trade name the source does not expand.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "100", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000133322 }, { "t_h": 4, "as_printed": { "value": "49", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 6.5328e-7 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 4, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t7-65-natural-crepe", "slug": null, "grade": null, "material_verbatim": "Natural crepe", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 7 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 730 x 1e-8 and K4 310 x 1e-8. Slopes of the log log plot as printed, alpha1 0.7 and alpha4 0.65. The table credits this row to reference 31 of the source, J Blears et al, Trans 1st IOVST Symp, 1960. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. Natural rubber. No natural rubber card exists among the 85 Matter cards.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "730", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000973253 }, { "t_h": 4, "as_printed": { "value": "310", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000413299 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 4, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t7-66-natural-gum", "slug": null, "grade": null, "material_verbatim": "Natural gum", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 7 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 120 x 1e-8 and K4 60 x 1e-8. Slopes of the log log plot as printed, alpha1 0.5 and alpha4 0.5. The table credits this row to reference 33 of the source, B B Dayton, CVC Technical Report. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. Natural rubber. No natural rubber card exists among the 85 Matter cards.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "120", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000159987 }, { "t_h": 4, "as_printed": { "value": "60", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 7.99934e-7 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 4, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t7-67-neoprene", "slug": "std-elastomers", "grade": null, "material_verbatim": "Neoprene", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 7 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 3000 x 1e-8 and K4 1800 x 1e-8. Slopes of the log log plot as printed, alpha1 0.4 and alpha4 0.4. The table credits this row to reference 31 of the source, J Blears et al, Trans 1st IOVST Symp, 1960. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "3000", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.0000399967 }, { "t_h": 4, "as_printed": { "value": "1800", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.000023998 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 4, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t7-68-neoprene", "slug": "std-elastomers", "grade": null, "material_verbatim": "Neoprene", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 7 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 300 x 1e-8 and K4 145 x 1e-8. Slopes of the log log plot as printed, alpha1 0.5 and alpha4 0.5. The table credits this row to reference 33 of the source, B B Dayton, CVC Technical Report. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "300", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000399967 }, { "t_h": 4, "as_printed": { "value": "145", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000193317 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 4, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t7-69-nygon", "slug": null, "grade": null, "material_verbatim": "Nygon", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 7 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 1300 x 1e-8 and K4 650 x 1e-8. Slopes of the log log plot as printed, alpha1 0.5 and alpha4 0.6. The table credits this row to reference 31 of the source, J Blears et al, Trans 1st IOVST Symp, 1960. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. Nygon is a trade name the source does not expand.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "1300", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.0000173319 }, { "t_h": 4, "as_printed": { "value": "650", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000866595 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 4, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t7-70-perbuman", "slug": null, "grade": null, "material_verbatim": "Perbuman", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 7 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 350 x 1e-8 and K4 220 x 1e-8. Slopes of the log log plot as printed, alpha1 0.3 and alpha4 0.5. The table credits this row to reference 31 of the source, J Blears et al, Trans 1st IOVST Symp, 1960. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. The source prints Perbuman. Perbunan is the trade name of a nitrile rubber and would place this row on std-elastomers, but the printed string is not that word and the corpus does not correct a source.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "350", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000466628 }, { "t_h": 4, "as_printed": { "value": "220", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000293309 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 4, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t7-71-poliosocyanate", "slug": null, "grade": null, "material_verbatim": "Poliosocyanate", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 7 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 2800 x 1e-8 and K4 1270 x 1e-8. Slopes of the log log plot as printed, alpha1 0.45 and alpha4 0.57. The table credits this row to reference 31 of the source, J Blears et al, Trans 1st IOVST Symp, 1960. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. Poliosocyanate is printed as such by the source and is not a designation the corpus can place.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "2800", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.0000373303 }, { "t_h": 4, "as_printed": { "value": "1270", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.0000169319 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 4, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t7-72-polyurethane", "slug": null, "grade": null, "material_verbatim": "Polyurethane", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 7 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 50 x 1e-8 and K4 25 x 1e-8. Slopes of the log log plot as printed, alpha1 0.5 and alpha4 0.5. The table credits this row to reference 32 of the source, R Jaeckel and F J Schitto, Gas Evolution from Materials in Vacuum, West Germany Ministry Research Report. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. No polyurethane card exists among the 85 Matter cards.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "50", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 6.66612e-7 }, { "t_h": 4, "as_printed": { "value": "25", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 3.33306e-7 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 4, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t7-73-silicone", "slug": "silicones", "grade": null, "material_verbatim": "Silicone", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 7 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 1800 x 1e-8 and K4 440 x 1e-8. Slopes of the log log plot as printed, alpha1 1.0 and alpha4 1.2. The table credits this row to reference 32 of the source, R Jaeckel and F J Schitto, Gas Evolution from Materials in Vacuum, West Germany Ministry Research Report. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "1800", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.000023998 }, { "t_h": 4, "as_printed": { "value": "440", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000586618 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 4, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t7-74-viton-a-fresh", "slug": "viton", "grade": null, "material_verbatim": "Viton A (fresh)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "fresh", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": 1 }, "conditions": "Table 7 of the source. Published in torr l per s per cm2 with the column multiplier 1e-8, converted to the canonical unit at build by the exact definition of the units. Published values K1 114 x 1e-8. Slopes of the log log plot as printed, alpha1 0.8 and alpha4 not printed. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. The source prints no value at the other pumping time of this table.", "contradictions": [], "value": { "_source": "S-ELSEY-1975-II", "as_printed": { "value": "114", "multiplier": "1e-8", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000151987 } }, { "id": "og-elsey-t8-75-steatite", "slug": null, "grade": null, "material_verbatim": "Steatite", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 8 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 900 x 1e-10 and K10 95 x 1e-10. Slopes of the log log plot as printed, alpha1 1 and alpha10 1. The table credits this row to reference 4 of the source, R Geller, Le Vide, 13, No 74, 1958, 71. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. Steatite is a magnesium silicate ceramic. No steatite card exists among the 85 Matter cards.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "900", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.1999e-7 }, { "t_h": 10, "as_printed": { "value": "95", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.26656e-8 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t8-76-pyrophyllite", "slug": null, "grade": null, "material_verbatim": "Pyrophyllite", "class": "rate", "species": "total", "state": "unbaked", "treatment": "not stated", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 8 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 2000 x 1e-10 and K10 200 x 1e-10. Slopes of the log log plot as printed, alpha1 1 and alpha10 1. The table credits this row to reference 32 of the source, R Jaeckel and F J Schitto, Gas Evolution from Materials in Vacuum, West Germany Ministry Research Report. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen. Slug left null. Pyrophyllite is an aluminium silicate ceramic. No card covers it.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "2000", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.66645e-7 }, { "t_h": 10, "as_printed": { "value": "200", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.66645e-8 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t8-77-pyrex-fresh", "slug": "silica-borosilicate", "grade": null, "material_verbatim": "Pyrex (fresh)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "fresh", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 8 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 73.5 x 1e-10 and K10 5.5 x 1e-10. Slopes of the log log plot as printed, alpha1 1.1 and alpha10 1.7. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "73.5", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 9.79919e-9 }, { "t_h": 10, "as_printed": { "value": "5.5", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 7.33273e-10 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t8-78-pyrex-1-month-in-air", "slug": "silica-borosilicate", "grade": null, "material_verbatim": "Pyrex (1 month in air)", "class": "rate", "species": "total", "state": "unbaked", "treatment": "1 month in air", "bake": null, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "conditions": "Table 8 of the source. Published in torr l per s per cm2 with the column multiplier 1e-10, converted to the canonical unit at build by the exact definition of the units. Published values K1 11.6 x 1e-10 and K10 1.6 x 1e-10. Slopes of the log log plot as printed, alpha1 0.9 and alpha10 0.7. The table credits this row to reference 9 of the source, A Schram, Le Vide, No 103, 1963, 55. The tables of this source state neither a measurement temperature nor a gas species, and the source states in section 3.1 that the evolved gas is in general a mixture of water vapour, hydrogen, carbon monoxide and other gases treated as though it were air or nitrogen.", "contradictions": [], "curve": { "points": [ { "t_h": 1, "as_printed": { "value": "11.6", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.54654e-9 }, { "t_h": 10, "as_printed": { "value": "1.6", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.13316e-10 } ], "troncons": [ { "t_h_min": 1, "t_h_max": 10, "_source": "S-ELSEY-1975-II" } ] } }, { "id": "og-elsey-t5-1-aluminium", "slug": "aluminum-6061", "grade": null, "material_verbatim": "Aluminium", "class": "rate", "species": "total", "state": "baked", "treatment": "15 h at 250 C", "bake": { "temp_C": 250, "hours": 15, "atmosphere": "vacuum", "_source": "S-ELSEY-1975-II" }, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-ELSEY-1975-II", "as_printed": { "value": "4e-13", "unit_printed": "torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 5.33289e-13 }, "conditions": "Table 5 of the source, metals vacuum baked. Published K 40 x 1e-14 torr l per s per cm2, converted to the canonical unit at build by the exact definition of the units. The column head of this table carries NO pumping time subscript, unlike tables 4, 6, 7 and 8 where K1, K4 and K10 name theirs, so the pumping time at which this rate was read is not published. The table credits this row to reference 17 of the source, J R Young, J Vac Sci Technol, 6, 1969, 398. Treatment as printed, 15 h at 250 C.", "contradictions": [] }, { "id": "og-elsey-t5-2-aluminium", "slug": "aluminum-6061", "grade": null, "material_verbatim": "Aluminium", "class": "rate", "species": "total", "state": "baked", "treatment": "20 h at 100 C", "bake": { "temp_C": 100, "hours": 20, "atmosphere": "vacuum", "_source": "S-ELSEY-1975-II" }, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-ELSEY-1975-II", "as_printed": { "value": "4e-14", "unit_printed": "torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 5.33289e-14 }, "conditions": "Table 5 of the source, metals vacuum baked. Published K 4 x 1e-14 torr l per s per cm2, converted to the canonical unit at build by the exact definition of the units. The column head of this table carries NO pumping time subscript, unlike tables 4, 6, 7 and 8 where K1, K4 and K10 name theirs, so the pumping time at which this rate was read is not published. The table credits this row to reference 14 of the source, G Moraw, Vacuum, 24, 1974, 125. Treatment as printed, 20 h at 100 C.", "contradictions": [] }, { "id": "og-elsey-t5-3-copper", "slug": "copper-ofe", "grade": null, "material_verbatim": "Copper", "class": "rate", "species": "total", "state": "baked", "treatment": "20 h at 100 C", "bake": { "temp_C": 100, "hours": 20, "atmosphere": "vacuum", "_source": "S-ELSEY-1975-II" }, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-ELSEY-1975-II", "as_printed": { "value": "1.1e-12", "unit_printed": "torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.46655e-12 }, "conditions": "Table 5 of the source, metals vacuum baked. Published K 110 x 1e-14 torr l per s per cm2, converted to the canonical unit at build by the exact definition of the units. The column head of this table carries NO pumping time subscript, unlike tables 4, 6, 7 and 8 where K1, K4 and K10 name theirs, so the pumping time at which this rate was read is not published. The table credits this row to reference 14 of the source, G Moraw, Vacuum, 24, 1974, 125. Treatment as printed, 20 h at 100 C.", "contradictions": [] }, { "id": "og-elsey-t5-4-u15c-stainless-steel", "slug": null, "grade": null, "material_verbatim": "U15C Stainless Steel", "class": "rate", "species": "total", "state": "baked", "treatment": "45 h at 360 C", "bake": { "temp_C": 360, "hours": 45, "atmosphere": "vacuum", "_source": "S-ELSEY-1975-II" }, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-ELSEY-1975-II", "as_printed": { "value": "2.6e-12", "unit_printed": "torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 3.46638e-12 }, "conditions": "Table 5 of the source, metals vacuum baked. Published K 260 x 1e-14 torr l per s per cm2, converted to the canonical unit at build by the exact definition of the units. The column head of this table carries NO pumping time subscript, unlike tables 4, 6, 7 and 8 where K1, K4 and K10 name theirs, so the pumping time at which this rate was read is not published. The table credits this row to reference 11 of the source, R Calder and G Lewin, Br J appl Phys, 18, 1967, 1459. Treatment as printed, 45 h at 360 C. Slug left null. U15C is a proprietary designation the source does not expand. The composition is not printed.", "contradictions": [] }, { "id": "og-elsey-t5-5-u15c-stainless-steel", "slug": null, "grade": null, "material_verbatim": "U15C Stainless Steel", "class": "rate", "species": "total", "state": "baked", "treatment": "25 h at 300 C", "bake": { "temp_C": 300, "hours": 25, "atmosphere": "vacuum", "_source": "S-ELSEY-1975-II" }, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-ELSEY-1975-II", "as_printed": { "value": "4.5e-12", "unit_printed": "torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 5.99951e-12 }, "conditions": "Table 5 of the source, metals vacuum baked. Published K 450 x 1e-14 torr l per s per cm2, converted to the canonical unit at build by the exact definition of the units. The column head of this table carries NO pumping time subscript, unlike tables 4, 6, 7 and 8 where K1, K4 and K10 name theirs, so the pumping time at which this rate was read is not published. The table credits this row to reference 11 of the source, R Calder and G Lewin, Br J appl Phys, 18, 1967, 1459. Treatment as printed, 25 h at 300 C. Slug left null. U15C is a proprietary designation the source does not expand. The composition is not printed.", "contradictions": [] }, { "id": "og-elsey-t5-6-u15c-stainless-steel", "slug": null, "grade": null, "material_verbatim": "U15C Stainless Steel", "class": "rate", "species": "total", "state": "baked", "treatment": "3 h vacuum furnace degas at 1000 C plus 25 h in situ at 360 C", "bake": { "temp_C": 360, "hours": 25, "atmosphere": "vacuum", "_source": "S-ELSEY-1975-II" }, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-ELSEY-1975-II", "as_printed": { "value": "1.6e-14", "unit_printed": "torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.13316e-14 }, "conditions": "Table 5 of the source, metals vacuum baked. Published K 1.6 x 1e-14 torr l per s per cm2, converted to the canonical unit at build by the exact definition of the units. The column head of this table carries NO pumping time subscript, unlike tables 4, 6, 7 and 8 where K1, K4 and K10 name theirs, so the pumping time at which this rate was read is not published. The table credits this row to reference 11 of the source, R Calder and G Lewin, Br J appl Phys, 18, 1967, 1459. Treatment as printed, 3 h vacuum furnace degas at 1000 C plus 25 h in situ at 360 C. Slug left null. U15C is a proprietary designation the source does not expand. The composition is not printed.", "contradictions": [] }, { "id": "og-elsey-t5-7-304-stainless-steel-electro-polished", "slug": "stainless-316ln", "grade": null, "material_verbatim": "304 Stainless Steel (electro polished)", "class": "rate", "species": "total", "state": "baked", "treatment": "30 h at 250 C", "bake": { "temp_C": 250, "hours": 30, "atmosphere": "vacuum", "_source": "S-ELSEY-1975-II" }, "measurement": { "method": "stated", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-ELSEY-1975-II", "as_printed": { "value": "3e-12", "unit_printed": "torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 3.99967e-12 }, "conditions": "Table 5 of the source, metals vacuum baked. Published K 300 x 1e-14 torr l per s per cm2, converted to the canonical unit at build by the exact definition of the units. The column head of this table carries NO pumping time subscript, unlike tables 4, 6, 7 and 8 where K1, K4 and K10 name theirs, so the pumping time at which this rate was read is not published. The table credits this row to reference 17 of the source, J R Young, J Vac Sci Technol, 6, 1969, 398. Treatment as printed, 30 h at 250 C.", "contradictions": [] }, { "id": "og-tizrv-activation-180-benv2001", "slug": "neg-tizrv", "grade": null, "material_verbatim": "Sputter deposited TiZrV thin film, composition Ti 30 percent, Zr 20 percent, V 50 percent atomic, from intertwisted elemental wires", "class": "declaration", "kind": "insufficient_data", "sign": "negative", "text": "Full activation of the TiZrV coating is reached after 24 h in situ heating at 180 C. Activation begins between 120 and 150 C. This is the lowest activation temperature of some 18 different getter coatings studied by the group.", "motif": "The document publishes an activation temperature and not an outgassing rate, so no value field is filled. The abstract, section 2 and the caption of figure 1 all give 180 C for 24 h. Section 2 states that the same coating was found to display full activation after 24 h heating at 200 C in the earlier work of reference 3, and that the interval between 150 and 200 C was then explored to obtain a more precise value.", "_source": "S-BENVENUTI-TIZRV-2001", "conditions": "Measured on a 58 mm inner diameter chamber, not vented to air between baking cycles, by the variation of the ultimate pressure as a function of the baking temperature.", "contradictions": [] }, { "id": "og-tizrv-sticking-benv2001", "slug": "neg-tizrv", "grade": null, "material_verbatim": "TiZrV and other getter coatings after complete activation", "class": "declaration", "kind": "insufficient_data", "sign": "negative", "text": "After complete activation the measured sticking factors range between 6e-3 and 5e-2 for H2 and between 0.4 and 0.8 for CO, over the some 18 coatings produced and tested. Among the coatings tested the TiZrV films present the lowest sticking factors and also the smoothest surface.", "motif": "A sticking factor is a dimensionless capture probability, not an outgassing rate, so no value field is filled. The corpus carries it because it is the quantity that decides whether a getter surface is a pump or a source.", "_source": "S-BENVENUTI-TIZRV-2001", "conditions": "The spread closely corresponds to that reported in the literature for titanium films deposited in situ by sublimation, so the source states it cannot be imputed to the chemical composition or to variable surface cleanliness of the coatings. Composition of the coating, stated by the source, Ti 30 percent, Zr 20 percent and V 50 percent atomic, sputtered from a cathode of intertwisted elemental wires of the same diameter. It is this coating that activates at 180 C and that traps about 3500 ppm of argon.", "contradictions": [] }, { "id": "og-tizrv-ageing-benv2001", "slug": "neg-tizrv", "grade": null, "material_verbatim": "TiZrV film 5 micrometre thick, repeatedly activated and vented to air", "class": "declaration", "kind": "insufficient_data", "sign": "negative", "text": "Film deterioration may be counteracted over more than 25 activation and air venting cycles provided the heating temperature is increased up to 350 C. The figure shows 26 cycles carried out with a 30 percent decrease of the H2 sticking factor.", "motif": "The document publishes an ageing behaviour and not an outgassing rate. The activation is initially carried out at 200 C and the activation temperature is progressively increased as the H2 sticking factor decreases.", "_source": "S-BENVENUTI-TIZRV-2001", "conditions": "During activation the oxygen present in the surface passivation layer diffuses inside the getter film, which for a film of micrometre thickness raises the film oxygen concentration and may reduce pumping speed and capacity and raise the activation temperature. Preliminary measurements indicate that film ageing may be reduced by dry air venting. Composition of the coating, stated by the source, Ti 30 percent, Zr 20 percent and V 50 percent atomic, sputtered from a cathode of intertwisted elemental wires of the same diameter. It is this coating that activates at 180 C and that traps about 3500 ppm of argon.", "contradictions": [] }, { "id": "og-tizrv-ultimate-benv2001", "slug": "neg-tizrv", "grade": null, "material_verbatim": "TiZrV coated chambers 2 m long, diameters 34, 58 and 100 mm", "class": "declaration", "kind": "insufficient_data", "sign": "negative", "text": "The reported experimental data cover the pressure range from 1e-12 down to 1e-13 Torr. The source concludes that the measured pressures are an instrumental artefact consequent to the degassing of the measuring instrument, and that much lower pressures would be obtained but not measured in the absence of the gauge.", "motif": "An ultimate system pressure is not a surface outgassing rate and never converts to one without the pumping speed and the area, so no value field is filled. The source itself declares these pressures instrument limited.", "_source": "S-BENVENUTI-TIZRV-2001", "conditions": "Chambers connected to a vacuum system pumped by a sputter ion and a titanium sublimation pump through an orifice of 25 l per s for H2, with a CERN type Helmer gauge. Larger chambers of 160 mm were also measured but the source states the measuring uncertainty then becomes larger. Ultimate pressures in the 1e-14 Torr range reported a few years earlier are described as substantiated by these conclusions. Composition of the coating, stated by the source, Ti 30 percent, Zr 20 percent and V 50 percent atomic, sputtered from a cathode of intertwisted elemental wires of the same diameter. It is this coating that activates at 180 C and that traps about 3500 ppm of argon.", "contradictions": [] }, { "id": "og-tizrv-raregas-benv2001", "slug": "neg-tizrv", "grade": null, "material_verbatim": "TiZrV coating produced by sputtering from an intertwisted wire cathode", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "An argon content of about 3500 ppm has been measured in the coating, while for krypton the content is lower by two orders of magnitude. In both cases the source states that the room temperature degassing after activation provides a negligible contribution to the ultimate pressure.", "motif": "A trapped gas content in ppm is not an outgassing rate. It is carried because rare gases are not pumped by getters, so their release sets a floor the getter cannot lower.", "_source": "S-BENVENUTI-TIZRV-2001", "conditions": "Measured by laser ablating or melting a known amount of getter film and measuring the total amount of rare gas evolved. For comparison the source reports that sputter grown niobium films contain about 400 ppm of argon and that using krypton as the discharge gas the trapped amount decreases to a few ppm. Composition of the coating, stated by the source, Ti 30 percent, Zr 20 percent and V 50 percent atomic, sputtered from a cathode of intertwisted elemental wires of the same diameter. It is this coating that activates at 180 C and that traps about 3500 ppm of argon.", "contradictions": [] }, { "id": "og-ss304-lidylla-t010", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Type 304 stainless steel test chamber, inner surface electropolished, 1 m long and 15 cm in diameter, internal area 4747 cm2, oxide layer about 60 angstrom thick", "class": "rate", "_source": "S-LI-DYLLA-1993", "conditions": "Throughput method on a type 304 stainless steel chamber, inner surface electropolished, 1 m long and 15 cm in diameter, internal area 4747 cm2, oxide layer about 60 angstrom thick. Pumping speed throttled to 4.7 litre per s, chamber volume 16.7 litre, ambient temperature 25 C. Time zero is defined when the system pressure crosses 17 torr, the vapour pressure of water at 20 C. H2O absorbed 7.8 monolayers. Venting gas, ambient air. The rate is a water equivalent, and mass scans indicate that about 10 percent of the total outgassing comes from H2, CH4, CO and CO2 with less than 1 percent from any other species, which is why the species of this entry is total and not H2O. One monolayer is taken as about 5e19 molecules on the geometrical area of this chamber. The two fits are published in torr litre per cm2 per s with t in seconds and are NOT converted to the canonical unit of this corpus, because converting the coefficients of a fit would republish a fit nobody made.", "contradictions": [], "species": "total", "state": "unbaked", "treatment": "vented to 1 atm of ambient air, then pumped", "bake": null, "measurement": { "method": "throughput", "temp_C": 25, "pumping_time_h": "law-abscissa" }, "law": [ { "forme": "power", "Q10": 0.000267, "alpha": 1.22, "unite": "torr l/cm2 s, t in s", "t_min_s": 600, "t_max_s": 600000, "_source": "S-LI-DYLLA-1993", "note": "Table I of the source, first fit, Q = Q10 divided by t to the power alpha. The validity range is the observation period the source states, 6e2 to 6e5 s. Q10 is the rate the law would give at t = 1 s, which lies outside that range and is never served." }, { "forme": "double-power", "q1": 0.00196, "q0": 3.73e-8, "unite": "torr l/cm2 s, t in s", "t_min_s": 600, "t_max_s": 600000, "_source": "S-LI-DYLLA-1993", "note": "Table I of the source, second fit of the SAME data, Q = q1 divided by t to the power three halves, plus q0 divided by t to the power one half. The source publishes both fits side by side under two separate column heads, so the corpus carries two law blocks and never merges them into one four parameter law." } ] }, { "id": "og-ss304-lidylla-t020", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Type 304 stainless steel test chamber, inner surface electropolished, 1 m long and 15 cm in diameter, internal area 4747 cm2, oxide layer about 60 angstrom thick", "class": "rate", "_source": "S-LI-DYLLA-1993", "conditions": "Throughput method on a type 304 stainless steel chamber, inner surface electropolished, 1 m long and 15 cm in diameter, internal area 4747 cm2, oxide layer about 60 angstrom thick. Pumping speed throttled to 4.7 litre per s, chamber volume 16.7 litre, ambient temperature 25 C. Time zero is defined when the system pressure crosses 17 torr, the vapour pressure of water at 20 C. H2O absorbed 16.8 monolayers, H2O exposed 600 monolayers. Venting gas, controlled mixture of H2O and N2. The rate is a water equivalent, and mass scans indicate that about 10 percent of the total outgassing comes from H2, CH4, CO and CO2 with less than 1 percent from any other species, which is why the species of this entry is total and not H2O. One monolayer is taken as about 5e19 molecules on the geometrical area of this chamber. The two fits are published in torr litre per cm2 per s with t in seconds and are NOT converted to the canonical unit of this corpus, because converting the coefficients of a fit would republish a fit nobody made.", "contradictions": [], "species": "total", "state": "unbaked", "treatment": "vented to 1 atm of controlled mixture of H2O and N2, then pumped", "bake": null, "measurement": { "method": "throughput", "temp_C": 25, "pumping_time_h": "law-abscissa" }, "law": [ { "forme": "power", "Q10": 0.000821, "alpha": 1.3, "unite": "torr l/cm2 s, t in s", "t_min_s": 600, "t_max_s": 600000, "_source": "S-LI-DYLLA-1993", "note": "Table I of the source, first fit, Q = Q10 divided by t to the power alpha. The validity range is the observation period the source states, 6e2 to 6e5 s. Q10 is the rate the law would give at t = 1 s, which lies outside that range and is never served." }, { "forme": "double-power", "q1": 0.00423, "q0": 3.86e-8, "unite": "torr l/cm2 s, t in s", "t_min_s": 600, "t_max_s": 600000, "_source": "S-LI-DYLLA-1993", "note": "Table I of the source, second fit of the SAME data, Q = q1 divided by t to the power three halves, plus q0 divided by t to the power one half. The source publishes both fits side by side under two separate column heads, so the corpus carries two law blocks and never merges them into one four parameter law." } ] }, { "id": "og-ss304-lidylla-t021", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Type 304 stainless steel test chamber, inner surface electropolished, 1 m long and 15 cm in diameter, internal area 4747 cm2, oxide layer about 60 angstrom thick", "class": "rate", "_source": "S-LI-DYLLA-1993", "conditions": "Throughput method on a type 304 stainless steel chamber, inner surface electropolished, 1 m long and 15 cm in diameter, internal area 4747 cm2, oxide layer about 60 angstrom thick. Pumping speed throttled to 4.7 litre per s, chamber volume 16.7 litre, ambient temperature 25 C. Time zero is defined when the system pressure crosses 17 torr, the vapour pressure of water at 20 C. H2O absorbed 9.2 monolayers, H2O exposed 400 monolayers. Venting gas, controlled mixture of H2O and N2. The rate is a water equivalent, and mass scans indicate that about 10 percent of the total outgassing comes from H2, CH4, CO and CO2 with less than 1 percent from any other species, which is why the species of this entry is total and not H2O. One monolayer is taken as about 5e19 molecules on the geometrical area of this chamber. The two fits are published in torr litre per cm2 per s with t in seconds and are NOT converted to the canonical unit of this corpus, because converting the coefficients of a fit would republish a fit nobody made.", "contradictions": [], "species": "total", "state": "unbaked", "treatment": "vented to 1 atm of controlled mixture of H2O and N2, then pumped", "bake": null, "measurement": { "method": "throughput", "temp_C": 25, "pumping_time_h": "law-abscissa" }, "law": [ { "forme": "power", "Q10": 0.000312, "alpha": 1.18, "unite": "torr l/cm2 s, t in s", "t_min_s": 600, "t_max_s": 600000, "_source": "S-LI-DYLLA-1993", "note": "Table I of the source, first fit, Q = Q10 divided by t to the power alpha. The validity range is the observation period the source states, 6e2 to 6e5 s. Q10 is the rate the law would give at t = 1 s, which lies outside that range and is never served." }, { "forme": "double-power", "q1": 0.00315, "q0": 5.86e-8, "unite": "torr l/cm2 s, t in s", "t_min_s": 600, "t_max_s": 600000, "_source": "S-LI-DYLLA-1993", "note": "Table I of the source, second fit of the SAME data, Q = q1 divided by t to the power three halves, plus q0 divided by t to the power one half. The source publishes both fits side by side under two separate column heads, so the corpus carries two law blocks and never merges them into one four parameter law." } ] }, { "id": "og-ss304-lidylla-t022", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Type 304 stainless steel test chamber, inner surface electropolished, 1 m long and 15 cm in diameter, internal area 4747 cm2, oxide layer about 60 angstrom thick", "class": "rate", "_source": "S-LI-DYLLA-1993", "conditions": "Throughput method on a type 304 stainless steel chamber, inner surface electropolished, 1 m long and 15 cm in diameter, internal area 4747 cm2, oxide layer about 60 angstrom thick. Pumping speed throttled to 4.7 litre per s, chamber volume 16.7 litre, ambient temperature 25 C. Time zero is defined when the system pressure crosses 17 torr, the vapour pressure of water at 20 C. H2O absorbed 7.2 monolayers, H2O exposed 200 monolayers. Venting gas, controlled mixture of H2O and N2. The rate is a water equivalent, and mass scans indicate that about 10 percent of the total outgassing comes from H2, CH4, CO and CO2 with less than 1 percent from any other species, which is why the species of this entry is total and not H2O. One monolayer is taken as about 5e19 molecules on the geometrical area of this chamber. The two fits are published in torr litre per cm2 per s with t in seconds and are NOT converted to the canonical unit of this corpus, because converting the coefficients of a fit would republish a fit nobody made.", "contradictions": [], "species": "total", "state": "unbaked", "treatment": "vented to 1 atm of controlled mixture of H2O and N2, then pumped", "bake": null, "measurement": { "method": "throughput", "temp_C": 25, "pumping_time_h": "law-abscissa" }, "law": [ { "forme": "power", "Q10": 0.000236, "alpha": 1.19, "unite": "torr l/cm2 s, t in s", "t_min_s": 600, "t_max_s": 600000, "_source": "S-LI-DYLLA-1993", "note": "Table I of the source, first fit, Q = Q10 divided by t to the power alpha. The validity range is the observation period the source states, 6e2 to 6e5 s. Q10 is the rate the law would give at t = 1 s, which lies outside that range and is never served." }, { "forme": "double-power", "q1": 0.00211, "q0": 6.11e-8, "unite": "torr l/cm2 s, t in s", "t_min_s": 600, "t_max_s": 600000, "_source": "S-LI-DYLLA-1993", "note": "Table I of the source, second fit of the SAME data, Q = q1 divided by t to the power three halves, plus q0 divided by t to the power one half. The source publishes both fits side by side under two separate column heads, so the corpus carries two law blocks and never merges them into one four parameter law." } ] }, { "id": "og-ss304-lidylla-t023", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Type 304 stainless steel test chamber, inner surface electropolished, 1 m long and 15 cm in diameter, internal area 4747 cm2, oxide layer about 60 angstrom thick", "class": "rate", "_source": "S-LI-DYLLA-1993", "conditions": "Throughput method on a type 304 stainless steel chamber, inner surface electropolished, 1 m long and 15 cm in diameter, internal area 4747 cm2, oxide layer about 60 angstrom thick. Pumping speed throttled to 4.7 litre per s, chamber volume 16.7 litre, ambient temperature 25 C. Time zero is defined when the system pressure crosses 17 torr, the vapour pressure of water at 20 C. H2O absorbed 3.6 monolayers, H2O exposed 100 monolayers. Venting gas, controlled mixture of H2O and N2. The rate is a water equivalent, and mass scans indicate that about 10 percent of the total outgassing comes from H2, CH4, CO and CO2 with less than 1 percent from any other species, which is why the species of this entry is total and not H2O. One monolayer is taken as about 5e19 molecules on the geometrical area of this chamber. The two fits are published in torr litre per cm2 per s with t in seconds and are NOT converted to the canonical unit of this corpus, because converting the coefficients of a fit would republish a fit nobody made.", "contradictions": [], "species": "total", "state": "unbaked", "treatment": "vented to 1 atm of controlled mixture of H2O and N2, then pumped", "bake": null, "measurement": { "method": "throughput", "temp_C": 25, "pumping_time_h": "law-abscissa" }, "law": [ { "forme": "power", "Q10": 0.000087, "alpha": 1.09, "unite": "torr l/cm2 s, t in s", "t_min_s": 600, "t_max_s": 600000, "_source": "S-LI-DYLLA-1993", "note": "Table I of the source, first fit, Q = Q10 divided by t to the power alpha. The validity range is the observation period the source states, 6e2 to 6e5 s. Q10 is the rate the law would give at t = 1 s, which lies outside that range and is never served." }, { "forme": "double-power", "q1": 0.00155, "q0": 6.33e-8, "unite": "torr l/cm2 s, t in s", "t_min_s": 600, "t_max_s": 600000, "_source": "S-LI-DYLLA-1993", "note": "Table I of the source, second fit of the SAME data, Q = q1 divided by t to the power three halves, plus q0 divided by t to the power one half. The source publishes both fits side by side under two separate column heads, so the corpus carries two law blocks and never merges them into one four parameter law." } ] }, { "id": "og-ss304-lidylla-t024", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Type 304 stainless steel test chamber, inner surface electropolished, 1 m long and 15 cm in diameter, internal area 4747 cm2, oxide layer about 60 angstrom thick", "class": "rate", "_source": "S-LI-DYLLA-1993", "conditions": "Throughput method on a type 304 stainless steel chamber, inner surface electropolished, 1 m long and 15 cm in diameter, internal area 4747 cm2, oxide layer about 60 angstrom thick. Pumping speed throttled to 4.7 litre per s, chamber volume 16.7 litre, ambient temperature 25 C. Time zero is defined when the system pressure crosses 17 torr, the vapour pressure of water at 20 C. H2O absorbed 2.3 monolayers, H2O exposed 10 monolayers. Venting gas, controlled mixture of H2O and N2. The rate is a water equivalent, and mass scans indicate that about 10 percent of the total outgassing comes from H2, CH4, CO and CO2 with less than 1 percent from any other species, which is why the species of this entry is total and not H2O. One monolayer is taken as about 5e19 molecules on the geometrical area of this chamber. The two fits are published in torr litre per cm2 per s with t in seconds and are NOT converted to the canonical unit of this corpus, because converting the coefficients of a fit would republish a fit nobody made.", "contradictions": [], "species": "total", "state": "unbaked", "treatment": "vented to 1 atm of controlled mixture of H2O and N2, then pumped", "bake": null, "measurement": { "method": "throughput", "temp_C": 25, "pumping_time_h": "law-abscissa" }, "law": [ { "forme": "power", "Q10": 0.000052, "alpha": 1.07, "unite": "torr l/cm2 s, t in s", "t_min_s": 600, "t_max_s": 600000, "_source": "S-LI-DYLLA-1993", "note": "Table I of the source, first fit, Q = Q10 divided by t to the power alpha. The validity range is the observation period the source states, 6e2 to 6e5 s. Q10 is the rate the law would give at t = 1 s, which lies outside that range and is never served." }, { "forme": "double-power", "q1": 0.00086, "q0": 5.89e-8, "unite": "torr l/cm2 s, t in s", "t_min_s": 600, "t_max_s": 600000, "_source": "S-LI-DYLLA-1993", "note": "Table I of the source, second fit of the SAME data, Q = q1 divided by t to the power three halves, plus q0 divided by t to the power one half. The source publishes both fits side by side under two separate column heads, so the corpus carries two law blocks and never merges them into one four parameter law." } ] }, { "id": "og-ss304-lidylla-t030", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Type 304 stainless steel test chamber, inner surface electropolished, 1 m long and 15 cm in diameter, internal area 4747 cm2, oxide layer about 60 angstrom thick", "class": "rate", "_source": "S-LI-DYLLA-1993", "conditions": "Throughput method on a type 304 stainless steel chamber, inner surface electropolished, 1 m long and 15 cm in diameter, internal area 4747 cm2, oxide layer about 60 angstrom thick. Pumping speed throttled to 4.7 litre per s, chamber volume 16.7 litre, ambient temperature 25 C. Time zero is defined when the system pressure crosses 17 torr, the vapour pressure of water at 20 C. H2O absorbed 0.7 monolayers. Venting gas, N2 gas with more than 10 ppm H2O. The rate is a water equivalent, and mass scans indicate that about 10 percent of the total outgassing comes from H2, CH4, CO and CO2 with less than 1 percent from any other species, which is why the species of this entry is total and not H2O. One monolayer is taken as about 5e19 molecules on the geometrical area of this chamber. The two fits are published in torr litre per cm2 per s with t in seconds and are NOT converted to the canonical unit of this corpus, because converting the coefficients of a fit would republish a fit nobody made.", "contradictions": [], "species": "total", "state": "unbaked", "treatment": "vented to 1 atm of N2 gas carrying more than 10 ppm of water, from a base pressure of 6.1e-7 torr", "bake": null, "measurement": { "method": "throughput", "temp_C": 25, "pumping_time_h": "law-abscissa" }, "law": [ { "forme": "power", "Q10": 0.000012, "alpha": 0.96, "unite": "torr l/cm2 s, t in s", "t_min_s": 600, "t_max_s": 600000, "_source": "S-LI-DYLLA-1993", "note": "Table I of the source, first fit, Q = Q10 divided by t to the power alpha. The validity range is the observation period the source states, 6e2 to 6e5 s. Q10 is the rate the law would give at t = 1 s, which lies outside that range and is never served." }, { "forme": "double-power", "q1": 0.00029, "q0": 1.4e-7, "unite": "torr l/cm2 s, t in s", "t_min_s": 600, "t_max_s": 600000, "_source": "S-LI-DYLLA-1993", "note": "Table I of the source, second fit of the SAME data, Q = q1 divided by t to the power three halves, plus q0 divided by t to the power one half. The source publishes both fits side by side under two separate column heads, so the corpus carries two law blocks and never merges them into one four parameter law." } ] }, { "id": "og-ss304-lidylla-t040", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Type 304 stainless steel test chamber, inner surface electropolished, 1 m long and 15 cm in diameter, internal area 4747 cm2, oxide layer about 60 angstrom thick", "class": "rate", "_source": "S-LI-DYLLA-1993", "conditions": "Throughput method on a type 304 stainless steel chamber, inner surface electropolished, 1 m long and 15 cm in diameter, internal area 4747 cm2, oxide layer about 60 angstrom thick. Pumping speed throttled to 4.7 litre per s, chamber volume 16.7 litre, ambient temperature 25 C. Time zero is defined when the system pressure crosses 17 torr, the vapour pressure of water at 20 C. H2O absorbed 0.017 monolayers. Venting gas, highly dry N2 gas. The rate is a water equivalent, and mass scans indicate that about 10 percent of the total outgassing comes from H2, CH4, CO and CO2 with less than 1 percent from any other species, which is why the species of this entry is total and not H2O. One monolayer is taken as about 5e19 molecules on the geometrical area of this chamber. The two fits are published in torr litre per cm2 per s with t in seconds and are NOT converted to the canonical unit of this corpus, because converting the coefficients of a fit would republish a fit nobody made.", "contradictions": [], "species": "total", "state": "unbaked", "treatment": "vented after one day of vacuum baking of the test chamber at 100 C, then vented to 1 atm of highly dried N2", "bake": null, "measurement": { "method": "throughput", "temp_C": 25, "pumping_time_h": "law-abscissa" }, "law": [ { "forme": "power", "Q10": 5.07e-8, "alpha": 0.65, "unite": "torr l/cm2 s, t in s", "t_min_s": 600, "t_max_s": 600000, "_source": "S-LI-DYLLA-1993", "note": "Table I of the source, first fit, Q = Q10 divided by t to the power alpha. The validity range is the observation period the source states, 6e2 to 6e5 s. Q10 is the rate the law would give at t = 1 s, which lies outside that range and is never served." }, { "forme": "double-power", "q1": 0.0000891, "q0": 1.05e-8, "unite": "torr l/cm2 s, t in s", "t_min_s": 600, "t_max_s": 600000, "_source": "S-LI-DYLLA-1993", "note": "Table I of the source, second fit of the SAME data, Q = q1 divided by t to the power three halves, plus q0 divided by t to the power one half. The source publishes both fits side by side under two separate column heads, so the corpus carries two law blocks and never merges them into one four parameter law." } ] }, { "id": "og-ss304-lidylla-alpha-law", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Type 304 stainless steel, electropolished, as a function of water vapour exposure during venting", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "The power alpha is a function of the water exposure and decreases as the exposure decreases. The largest observed value is 1.3 for a 600 monolayer H2O exposure and the smallest is 0.6 for venting with highly purified N2. The model predicts alpha tending to 0.5 for the limit of dry gas exposures and to 1.5 for large water exposures above 600 monolayers.", "motif": "A power law exponent is not an outgassing rate. It is carried because it is the quantity that makes any single rate meaningless without its pumping time.", "_source": "S-LI-DYLLA-1993", "conditions": "Pump down to the base pressure of 5e-8 torr is reached in less than 2 h when the chamber is vented with dry nitrogen and takes more than 200 h after exposure to moist air. Integrating the desorbed water gives 16.8 monolayers for the 600 monolayer exposure and 0.017 monolayers for the highly dry nitrogen venting.", "contradictions": [] }, { "id": "og-ss304-lidylla-desorption-energy", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Water on a type 304 stainless steel surface", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "The activation energy for thermal desorption of water is 1 eV, or 20 kcal per mole, determined from the temperature dependence of the outgassing rate.", "motif": "A desorption activation energy is not a diffusion coefficient and does not belong in the diffusion block, whose Arrhenius form describes a diffusion law. It is carried as a declaration so that no field misnames it.", "_source": "S-LI-DYLLA-1993", "conditions": "Measured during the 800 monolayer water exposure trial. The chamber was pumped to 1.3e-5 torr, then the whole system was heated from room temperature 28 C to 60 C within 20 min. The pressure at 60 C was 1.2e-4 torr, almost ten times the pressure at 28 C. The source states the result is in good agreement with previous estimates and measurements.", "contradictions": [] }, { "id": "og-tizrv-figure1-ultimate-benv2001", "slug": "neg-tizrv", "grade": null, "material_verbatim": "TiZrV coating in a 58 mm inner diameter chamber, not vented to air between baking cycles", "class": "declaration", "kind": "insufficient_data", "sign": "negative", "text": "Figure 1 of the source plots the ultimate pressure against the temperature of a 24 h heating. Read from the logarithmic axis, the pressure is about 3e-11 Torr after 24 h at 120 C, about 5e-12 Torr at 150 C, and reaches a plateau at about 6e-13 Torr at 180, 200 and 250 C. The plateau is what proves the activation complete, and the caption states it in words, activation begins between 120 and 150 C and is complete after heating for 24 h at 180 C.", "motif": "THESE THREE NUMBERS ARE READ FROM A GRAPH, not from a table. The source tabulates none of them. They are carried as a declaration and never as a measurement, and their uncertainty is that of a reading on a logarithmic axis, of the order of the size of a plotted point, so about 20 percent on the mantissa. A system ultimate pressure is in any case not a surface outgassing rate and does not convert to one without the pumping speed and the area.", "_source": "S-BENVENUTI-TIZRV-2001", "conditions": "Chamber of 58 mm inner diameter, 2 m long, not vented to air between the baking cycles. The axes read Ultimate Pressure in Torr against 24 Hours Heating Temperature in degrees C. The source states elsewhere that the measured ultimate pressures are an instrumental artefact consequent to the degassing of the measuring gauge, so this plateau is a floor of the instrument and not of the coating. Composition of the coating, stated by the source, Ti 30 percent, Zr 20 percent and V 50 percent atomic, sputtered from a cathode of intertwisted elemental wires of the same diameter. It is this coating that activates at 180 C and that traps about 3500 ppm of argon.", "contradictions": [] }, { "id": "og-b4c-total-100c-semenov", "slug": "b4c", "grade": null, "material_verbatim": "Boron carbide ceramic", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "throughput", "temp_C": 100, "pumping_time_h": "curve-abscissa" }, "curve": { "points": [ { "t_h": 5, "as_printed": { "value": "7.52e-12", "unit_printed": "Torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.00258e-11 }, { "t_h": 24, "as_printed": { "value": "7.26e-12", "unit_printed": "Torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 9.6792e-12 }, { "t_h": 29, "as_printed": { "value": "7.5e-12", "unit_printed": "Torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 9.99918e-12 }, { "t_h": 5844, "as_printed": { "value": "3e-12", "unit_printed": "Torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 3.99967e-12 }, { "t_h": 8766, "as_printed": { "value": "2.22e-12", "unit_printed": "Torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.95976e-12 }, { "t_h": 14610, "as_printed": { "value": "2.09e-12", "unit_printed": "Torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.78644e-12 }, { "t_h": 16071, "as_printed": { "value": "1.89e-12", "unit_printed": "Torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.51979e-12 }, { "t_h": 16801.5, "as_printed": { "value": "1.87e-12", "unit_printed": "Torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.49313e-12 } ], "troncons": [ { "t_h_min": 5, "t_h_max": 16801.5, "_source": "S-SEMENOV-IPAC2021", "methode": "dynamic flow method" } ] }, "conditions": "Column at 100 C of table 1, eight readings of the same samples over 23 months in vacuum. Table 1 of the source, published in Torr l/s/cm2 and converted to the canonical unit at build by the exact definition of the units. The table publishes no gas species, so the value is recorded as a total rate. Elapsed times in months are converted with the mean Gregorian month of 730.5 h, and the verbatim column reads 5 hours, 24 hours, 29 hours, 8 months, 12 months, 20 months, 22 months and 23 months. Samples cleaned with isopropyl alcohol, ultrasonically treated in distilled water, and baked at 1000 C in vacuum. The baking cycle before the outgassing test was a ramp from room temperature to 320 C in 10 h, 24 h at 320 C, a ramp back to room temperature in 10 h, 36 h at room temperature, a ramp to 100 C in 3 h, then steady 100 C for testing. The area of the ceramic was more than ten times the area of the empty test volume. Dynamic flow method. The pressure drop across an element of known molecular conductivity is measured, and the gas release of the empty test volume is compared with the volume filled with samples. Pressure read by a hot cathode gauge, partial pressures by an SRS quadrupole. The measured background outgassing of the empty stainless steel volume was 3.3e-11 Torr l/s/cm2 at 100 C. The source states that the rate meets the ITER Vacuum Handbook requirement of not more than 1e-10 Torr l/s/cm2 for hydrogen and not more than 1e-12 Torr l/s/cm2 for all other impurities, with a large reserve.", "contradictions": [], "bake": { "temp_C": 320, "hours": 24, "atmosphere": "vacuum", "_source": "S-SEMENOV-IPAC2021" }, "treatment": "baked at 1000 C in vacuum before the test, then the 320 C cycle described in the conditions" }, { "id": "og-b4c-total-rt-semenov", "slug": "b4c", "grade": null, "material_verbatim": "Boron carbide ceramic", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "throughput", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "curve": { "points": [ { "t_h": 29, "as_printed": { "value": "2.3e-12", "unit_printed": "Torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 3.06641e-12 }, { "t_h": 5844, "as_printed": { "value": "1.1e-13", "unit_printed": "Torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.46655e-13 }, { "t_h": 8766, "as_printed": { "value": "5.56e-14", "unit_printed": "Torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 7.41272e-14 } ], "troncons": [ { "t_h_min": 29, "t_h_max": 8766, "_source": "S-SEMENOV-IPAC2021", "methode": "dynamic flow method" } ] }, "conditions": "Column at room temperature of table 1, three readings of the same samples. The source writes RT and states no number for it, so the measurement temperature is recorded as absent rather than guessed. Table 1 of the source, published in Torr l/s/cm2 and converted to the canonical unit at build by the exact definition of the units. The table publishes no gas species, so the value is recorded as a total rate. Elapsed times in months are converted with the mean Gregorian month of 730.5 h, and the verbatim column reads 5 hours, 24 hours, 29 hours, 8 months, 12 months, 20 months, 22 months and 23 months. Samples cleaned with isopropyl alcohol, ultrasonically treated in distilled water, and baked at 1000 C in vacuum. The baking cycle before the outgassing test was a ramp from room temperature to 320 C in 10 h, 24 h at 320 C, a ramp back to room temperature in 10 h, 36 h at room temperature, a ramp to 100 C in 3 h, then steady 100 C for testing. The area of the ceramic was more than ten times the area of the empty test volume.", "contradictions": [], "bake": { "temp_C": 320, "hours": 24, "atmosphere": "vacuum", "_source": "S-SEMENOV-IPAC2021" }, "treatment": "baked at 1000 C in vacuum before the test, then the 320 C cycle described in the conditions" }, { "id": "og-p43-total-pd1-24h-semenov", "slug": null, "grade": null, "material_verbatim": "Phosphor P43, Gd2O2S:Tb, deposited by sedimentation with extra adhesive material", "class": "rate", "species": "total", "state": "unbaked", "measurement": { "method": "throughput", "temp_C": null, "pumping_time_h": 24 }, "value": { "_source": "S-SEMENOV-IPAC2021", "as_printed": { "value": "8e-8", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.06658e-7 }, "conditions": "First pumping down, 24 h in vacuum, no bakeout yet. Table 2 of the source, published in l Torr/(s cm2) and converted to the canonical unit at build by the exact definition of the units. The table publishes no gas species and no measurement temperature, so the value is recorded as a total rate with an absent temperature. The experiments were carried out without special cleaning. The source reports a high peak at 32 a.m.u. in the residual spectra that it states is not yet explained. During these tests the whole volume was heated, and the source states that the setup has since been improved so that only the phosphor will be heated. No card of The Matter carries scintillating phosphors, so the slug is null.", "contradictions": [], "treatment": "no bakeout, pumped from atmosphere" }, { "id": "og-p43-total-pd1-14d-semenov", "slug": null, "grade": null, "material_verbatim": "Phosphor P43, Gd2O2S:Tb, deposited by sedimentation with extra adhesive material", "class": "rate", "species": "total", "state": "unbaked", "measurement": { "method": "throughput", "temp_C": null, "pumping_time_h": 336 }, "value": { "_source": "S-SEMENOV-IPAC2021", "as_printed": { "value": "1.3e-8", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.73319e-8 }, "conditions": "First pumping down, 14 days in vacuum, no bakeout yet. Table 2 of the source, published in l Torr/(s cm2) and converted to the canonical unit at build by the exact definition of the units. The table publishes no gas species and no measurement temperature, so the value is recorded as a total rate with an absent temperature. The experiments were carried out without special cleaning. The source reports a high peak at 32 a.m.u. in the residual spectra that it states is not yet explained. During these tests the whole volume was heated, and the source states that the setup has since been improved so that only the phosphor will be heated. No card of The Matter carries scintillating phosphors, so the slug is null.", "contradictions": [], "treatment": "no bakeout, pumped from atmosphere" }, { "id": "og-p43-total-pd1-bake1-24h-semenov", "slug": null, "grade": null, "material_verbatim": "Phosphor P43, Gd2O2S:Tb, deposited by sedimentation with extra adhesive material", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "throughput", "temp_C": null, "pumping_time_h": 24 }, "value": { "_source": "S-SEMENOV-IPAC2021", "as_printed": { "value": "1e-10", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.33322e-10 }, "conditions": "First pumping down, after in situ bakeout number 1 at 140 C for 24 h. Table 2 of the source, published in l Torr/(s cm2) and converted to the canonical unit at build by the exact definition of the units. The table publishes no gas species and no measurement temperature, so the value is recorded as a total rate with an absent temperature. The experiments were carried out without special cleaning. The source reports a high peak at 32 a.m.u. in the residual spectra that it states is not yet explained. During these tests the whole volume was heated, and the source states that the setup has since been improved so that only the phosphor will be heated. No card of The Matter carries scintillating phosphors, so the slug is null.", "contradictions": [], "bake": { "temp_C": 140, "hours": 24, "atmosphere": "vacuum", "_source": "S-SEMENOV-IPAC2021" }, "treatment": "in situ bakeout at 140 C for 24 hours" }, { "id": "og-p43-total-pd2-24h-semenov", "slug": null, "grade": null, "material_verbatim": "Phosphor P43, Gd2O2S:Tb, deposited by sedimentation with extra adhesive material", "class": "rate", "species": "total", "state": "unbaked", "measurement": { "method": "throughput", "temp_C": null, "pumping_time_h": 24 }, "value": { "_source": "S-SEMENOV-IPAC2021", "as_printed": { "value": "9.4e-9", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.25323e-8 }, "conditions": "After an air vent, second pumping down, 24 h in vacuum. Table 2 of the source, published in l Torr/(s cm2) and converted to the canonical unit at build by the exact definition of the units. The table publishes no gas species and no measurement temperature, so the value is recorded as a total rate with an absent temperature. The experiments were carried out without special cleaning. The source reports a high peak at 32 a.m.u. in the residual spectra that it states is not yet explained. During these tests the whole volume was heated, and the source states that the setup has since been improved so that only the phosphor will be heated. No card of The Matter carries scintillating phosphors, so the slug is null.", "contradictions": [], "treatment": "no bakeout, pumped from atmosphere" }, { "id": "og-p43-total-pd2-48h-semenov", "slug": null, "grade": null, "material_verbatim": "Phosphor P43, Gd2O2S:Tb, deposited by sedimentation with extra adhesive material", "class": "rate", "species": "total", "state": "unbaked", "measurement": { "method": "throughput", "temp_C": null, "pumping_time_h": 48 }, "value": { "_source": "S-SEMENOV-IPAC2021", "as_printed": { "value": "4.6e-9", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 6.13283e-9 }, "conditions": "After an air vent, second pumping down, 48 h in vacuum. Table 2 of the source, published in l Torr/(s cm2) and converted to the canonical unit at build by the exact definition of the units. The table publishes no gas species and no measurement temperature, so the value is recorded as a total rate with an absent temperature. The experiments were carried out without special cleaning. The source reports a high peak at 32 a.m.u. in the residual spectra that it states is not yet explained. During these tests the whole volume was heated, and the source states that the setup has since been improved so that only the phosphor will be heated. No card of The Matter carries scintillating phosphors, so the slug is null.", "contradictions": [], "treatment": "no bakeout, pumped from atmosphere" }, { "id": "og-p43-total-pd2-bake2-3d-semenov", "slug": null, "grade": null, "material_verbatim": "Phosphor P43, Gd2O2S:Tb, deposited by sedimentation with extra adhesive material", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "throughput", "temp_C": null, "pumping_time_h": 72 }, "value": { "_source": "S-SEMENOV-IPAC2021", "as_printed": { "value": "4e-11", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 5.33289e-11 }, "conditions": "Second pumping down, after in situ bakeout number 2 at 140 C for 24 h. Table 2 of the source, published in l Torr/(s cm2) and converted to the canonical unit at build by the exact definition of the units. The table publishes no gas species and no measurement temperature, so the value is recorded as a total rate with an absent temperature. The experiments were carried out without special cleaning. The source reports a high peak at 32 a.m.u. in the residual spectra that it states is not yet explained. During these tests the whole volume was heated, and the source states that the setup has since been improved so that only the phosphor will be heated. No card of The Matter carries scintillating phosphors, so the slug is null.", "contradictions": [], "bake": { "temp_C": 140, "hours": 24, "atmosphere": "vacuum", "_source": "S-SEMENOV-IPAC2021" }, "treatment": "in situ bakeout at 140 C for 24 hours" }, { "id": "og-p43-total-pd3-48h-semenov", "slug": null, "grade": null, "material_verbatim": "Phosphor P43, Gd2O2S:Tb, deposited by sedimentation with extra adhesive material", "class": "rate", "species": "total", "state": "unbaked", "measurement": { "method": "throughput", "temp_C": null, "pumping_time_h": 48 }, "value": { "_source": "S-SEMENOV-IPAC2021", "as_printed": { "value": "3.7e-9", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 4.93293e-9 }, "conditions": "After a second air vent, third pumping down, 48 h in vacuum. Table 2 of the source, published in l Torr/(s cm2) and converted to the canonical unit at build by the exact definition of the units. The table publishes no gas species and no measurement temperature, so the value is recorded as a total rate with an absent temperature. The experiments were carried out without special cleaning. The source reports a high peak at 32 a.m.u. in the residual spectra that it states is not yet explained. During these tests the whole volume was heated, and the source states that the setup has since been improved so that only the phosphor will be heated. No card of The Matter carries scintillating phosphors, so the slug is null.", "contradictions": [], "treatment": "no bakeout, pumped from atmosphere" }, { "id": "og-p43-total-pd3-bake3-24h-semenov", "slug": null, "grade": null, "material_verbatim": "Phosphor P43, Gd2O2S:Tb, deposited by sedimentation with extra adhesive material", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "throughput", "temp_C": null, "pumping_time_h": 24 }, "value": { "_source": "S-SEMENOV-IPAC2021", "as_printed": { "value": "3.7e-11", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 4.93293e-11 }, "conditions": "Third pumping down, after in situ bakeout number 3 at 140 C for 24 h. Table 2 of the source, published in l Torr/(s cm2) and converted to the canonical unit at build by the exact definition of the units. The table publishes no gas species and no measurement temperature, so the value is recorded as a total rate with an absent temperature. The experiments were carried out without special cleaning. The source reports a high peak at 32 a.m.u. in the residual spectra that it states is not yet explained. During these tests the whole volume was heated, and the source states that the setup has since been improved so that only the phosphor will be heated. No card of The Matter carries scintillating phosphors, so the slug is null.", "contradictions": [], "bake": { "temp_C": 140, "hours": 24, "atmosphere": "vacuum", "_source": "S-SEMENOV-IPAC2021" }, "treatment": "in situ bakeout at 140 C for 24 hours" }, { "id": "og-p43-total-pd3-bake3-7d-semenov", "slug": null, "grade": null, "material_verbatim": "Phosphor P43, Gd2O2S:Tb, deposited by sedimentation with extra adhesive material", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "throughput", "temp_C": null, "pumping_time_h": 168 }, "value": { "_source": "S-SEMENOV-IPAC2021", "as_printed": { "value": "1e-11", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.33322e-11 }, "conditions": "Third pumping down, after in situ bakeout number 3 at 140 C for 24 h. Table 2 of the source, published in l Torr/(s cm2) and converted to the canonical unit at build by the exact definition of the units. The table publishes no gas species and no measurement temperature, so the value is recorded as a total rate with an absent temperature. The experiments were carried out without special cleaning. The source reports a high peak at 32 a.m.u. in the residual spectra that it states is not yet explained. During these tests the whole volume was heated, and the source states that the setup has since been improved so that only the phosphor will be heated. No card of The Matter carries scintillating phosphors, so the slug is null.", "contradictions": [], "bake": { "temp_C": 140, "hours": 24, "atmosphere": "vacuum", "_source": "S-SEMENOV-IPAC2021" }, "treatment": "in situ bakeout at 140 C for 24 hours" }, { "id": "og-pmma-total-annealed-semenov", "slug": "pvc-nylon", "grade": null, "material_verbatim": "Ultrahigh molecular weight polymethylmethacrylate, sample number 2, obtained by frontal polymerization at 60 C for 5 days, molecular weight about 1e7 g per mole", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "throughput", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "curve": { "points": [ { "t_h": 24, "as_printed": { "value": "7.8e-7", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 0.00000103991 }, { "t_h": 48, "as_printed": { "value": "4.4e-7", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 5.86618e-7 }, { "t_h": 72, "as_printed": { "value": "3.3e-7", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 4.39964e-7 }, { "t_h": 96, "as_printed": { "value": "2.7e-7", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 3.5997e-7 }, { "t_h": 168, "as_printed": { "value": "2e-7", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.66645e-7 }, { "t_h": 192, "as_printed": { "value": "1.6e-7", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.13316e-7 }, { "t_h": 264, "as_printed": { "value": "1.2e-7", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.59987e-7 } ], "troncons": [ { "t_h_min": 24, "t_h_max": 264, "_source": "S-SEMENOV-IPAC2021" } ] }, "conditions": "First block of table 3, seven readings from 1 to 11 days in vacuum after the anneal and before any in situ bakeout. Table 3 of the source, published in l Torr/(s cm2) and converted to the canonical unit at build by the exact definition of the units. The table publishes no gas species and no measurement temperature. The samples were purified by film evaporation under reduced pressure with a rotary vaporizer, polymerized by electron flux from the ILU-6 linear accelerator, mechanically treated and polished, then annealed at 110 C for 1 day. The source states that usual PMMA has a molecular weight of about 1e6 g per mole and that usual PMMA and sample number 1 showed no difference in outgassing rate.", "contradictions": [], "bake": { "temp_C": 110, "hours": 24, "_source": "S-SEMENOV-IPAC2021" }, "treatment": "annealed at 110 C for 1 day after mechanical treatment and polishing, and baked out at 110 C" }, { "id": "og-pmma-total-bake120-semenov", "slug": "pvc-nylon", "grade": null, "material_verbatim": "Ultrahigh molecular weight polymethylmethacrylate, sample number 2, obtained by frontal polymerization at 60 C for 5 days, molecular weight about 1e7 g per mole", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "throughput", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "curve": { "points": [ { "t_h": 24, "as_printed": { "value": "1.6e-8", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.13316e-8 }, { "t_h": 48, "as_printed": { "value": "1.46e-8", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.94651e-8 }, { "t_h": 72, "as_printed": { "value": "1.34e-8", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.78652e-8 } ], "troncons": [ { "t_h_min": 24, "t_h_max": 72, "_source": "S-SEMENOV-IPAC2021" } ] }, "conditions": "Second block of table 3, after the in situ bakeout at 120 C for 24 h. Table 3 of the source, published in l Torr/(s cm2) and converted to the canonical unit at build by the exact definition of the units. The table publishes no gas species and no measurement temperature. The samples were purified by film evaporation under reduced pressure with a rotary vaporizer, polymerized by electron flux from the ILU-6 linear accelerator, mechanically treated and polished, then annealed at 110 C for 1 day. The source states that usual PMMA has a molecular weight of about 1e6 g per mole and that usual PMMA and sample number 1 showed no difference in outgassing rate.", "contradictions": [], "bake": { "temp_C": 120, "hours": 24, "atmosphere": "vacuum", "_source": "S-SEMENOV-IPAC2021" }, "treatment": "in situ bakeout at 120 C for 24 h after the anneal at 110 C" }, { "id": "og-pmma-total-airvent-semenov", "slug": "pvc-nylon", "grade": null, "material_verbatim": "Ultrahigh molecular weight polymethylmethacrylate, sample number 2, obtained by frontal polymerization at 60 C for 5 days, molecular weight about 1e7 g per mole", "class": "rate", "species": "total", "state": "unbaked", "measurement": { "method": "throughput", "temp_C": null, "pumping_time_h": "curve-abscissa" }, "curve": { "points": [ { "t_h": 24, "as_printed": { "value": "1.17e-7", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.55987e-7 }, { "t_h": 96, "as_printed": { "value": "2.75e-8", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 3.66637e-8 } ], "troncons": [ { "t_h_min": 24, "t_h_max": 96, "_source": "S-SEMENOV-IPAC2021" } ] }, "conditions": "Third block of table 3, after an air vent that follows the bakeout at 120 C. The state is recorded as unbaked because the surface saw atmosphere again after the bakeout, and the history is stated here rather than folded into a single word. Table 3 of the source, published in l Torr/(s cm2) and converted to the canonical unit at build by the exact definition of the units. The table publishes no gas species and no measurement temperature. The samples were purified by film evaporation under reduced pressure with a rotary vaporizer, polymerized by electron flux from the ILU-6 linear accelerator, mechanically treated and polished, then annealed at 110 C for 1 day. The source states that usual PMMA has a molecular weight of about 1e6 g per mole and that usual PMMA and sample number 1 showed no difference in outgassing rate.", "contradictions": [], "treatment": "air vent after the in situ bakeout at 120 C for 24 h" }, { "id": "og-ss-total-1day-semenov", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Stainless steel, reference sample of table 3", "class": "rate", "species": "total", "state": "not-stated", "measurement": { "method": "throughput", "temp_C": null, "pumping_time_h": 24 }, "value": { "_source": "S-SEMENOV-IPAC2021", "as_printed": { "value": "2.3e-10", "unit_printed": "l Torr/(s cm2)", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 3.06641e-10 }, "conditions": "Table 3 of the source publishes one stainless steel reading, at 1 day in vacuum, in the same table as the PMMA samples. The source states no grade, no surface treatment and no measurement temperature for this reference, so the state is recorded as not stated. Published in l Torr/(s cm2) and converted to the canonical unit at build by the exact definition of the units.", "contradictions": [] }, { "id": "og-ss-total-100c-background-semenov", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Stainless steel, empty test volume of the apparatus", "class": "rate", "species": "total", "state": "not-stated", "measurement": { "method": "throughput", "temp_C": 100, "pumping_time_h": "not-stated" }, "value": { "_source": "S-SEMENOV-IPAC2021", "as_printed": { "value": "3.3e-11", "unit_printed": "torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 4.39964e-11 }, "conditions": "Not a table value. The setup section states in prose that the measured background outgassing of the empty stainless steel volume was 3.3e-11 Torr l/s/cm2 at 100 C. The source states no pumping time for this number and no surface treatment. Converted to the canonical unit at build by the exact definition of the units.", "contradictions": [] }, { "id": "og-ss304l-h2-vac1-before-sefa", "slug": "stainless-316ln", "grade": null, "material_verbatim": "SAE 304L stainless steel chamber VAC1, before heat treatment", "class": "rate", "species": "H2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-SEFA-2017", "as_printed": { "value": "1.8e-9", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 1.8e-11 }, "conditions": "Chamber VAC1, row published as before heat treatment. The only thermal condition applied is the standard bake at 150 C for 72 h that precedes every measurement. Table II of the source. Four nominally identical chambers assembled from standard DN40CF components in SAE 304L, UNS S30403, inner surface area 348 cm2 and volume 0.291 l, cleaned with a commercial detergent in a warm ultrasonic bath, rinsed in deionized water, then in isopropyl alcohol, and blown dry with nitrogen. Copper gaskets of oxygen free high purity copper, about 5 percent of the chamber area. Before every outgassing measurement all chambers were exposed to laboratory air, evacuated and baked at 150 C for 72 h, and the outgassing fluxes were measured for chamber temperatures between 20 and 21 C, a range the source states without a single number, so the measurement temperature is recorded as absent. The method is a rate of rise on a spinning rotor gauge, SI traceable through a NIST calibration of the accommodation coefficient. The total combined uncertainty is about 20 percent at k equal to 2. Published in Pa l/s/cm2 and converted to the canonical unit at build by the exact definition of the units. The source states no pumping time for these readings, only that measurements began once the system had reached a pressure below 1e-7 Pa after the bake.", "contradictions": [ { "against": "og-ss-h2-baked-150-cas", "kind": "value", "values": [ { "q_mbar_l_s_cm2": 1.8e-11, "_source": "S-SEFA-2017", "where": "table II of this source, chamber VAC1 before heat treatment, H2, after a bake at 150 C for 72 h, measured between 20 and 21 C" }, { "q_mbar_l_s_cm2": 3e-12, "where": "the corpus entry og-ss-h2-baked-150-cas, austenitic stainless steel, H2, after 150 C for 24 h" } ], "retenue": null, "note": "Two hydrogen rates for austenitic stainless steel after a bake at 150 C, a factor of about six apart. The bake durations differ, 72 h against 24 h, and the surface histories differ. Neither is declared wrong. The disagreement is recorded so that a reader who takes one of them knows the other exists." } ], "bake": { "temp_C": 150, "hours": 72, "atmosphere": "vacuum", "_source": "S-SEFA-2017" }, "treatment": "chamber VAC1, no medium temperature heat treatment" }, { "id": "og-ss304l-n2eq-vac1-before-sefa", "slug": "stainless-316ln", "grade": null, "material_verbatim": "SAE 304L stainless steel chamber VAC1, before heat treatment", "class": "rate", "species": "N2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-SEFA-2017", "as_printed": { "value": "4.7e-10", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 4.7e-12 }, "conditions": "Chamber VAC1, row published as before heat treatment. The only thermal condition applied is the standard bake at 150 C for 72 h that precedes every measurement. The nitrogen equivalent flux is not a nitrogen measurement. The source states that more than 95 percent of the desorbed gas was observed to be H2, and that the nitrogen equivalent rate is obtained by assuming the outgassing species is N2 and using the N2 sensitivity factor for the gauge sensitivity in the analysis. It is published to allow comparison with authors who report in nitrogen equivalent, and it is kept here as a separate reading rather than merged with the hydrogen one. Table II of the source. Four nominally identical chambers assembled from standard DN40CF components in SAE 304L, UNS S30403, inner surface area 348 cm2 and volume 0.291 l, cleaned with a commercial detergent in a warm ultrasonic bath, rinsed in deionized water, then in isopropyl alcohol, and blown dry with nitrogen. Copper gaskets of oxygen free high purity copper, about 5 percent of the chamber area. Before every outgassing measurement all chambers were exposed to laboratory air, evacuated and baked at 150 C for 72 h, and the outgassing fluxes were measured for chamber temperatures between 20 and 21 C, a range the source states without a single number, so the measurement temperature is recorded as absent. The method is a rate of rise on a spinning rotor gauge, SI traceable through a NIST calibration of the accommodation coefficient. The total combined uncertainty is about 20 percent at k equal to 2. Published in Pa l/s/cm2 and converted to the canonical unit at build by the exact definition of the units. The source states no pumping time for these readings, only that measurements began once the system had reached a pressure below 1e-7 Pa after the bake.", "contradictions": [], "bake": { "temp_C": 150, "hours": 72, "atmosphere": "vacuum", "_source": "S-SEFA-2017" }, "treatment": "chamber VAC1, no medium temperature heat treatment" }, { "id": "og-ss304l-h2-lair2-before-sefa", "slug": "stainless-316ln", "grade": null, "material_verbatim": "SAE 304L stainless steel chamber LAIR2, before heat treatment", "class": "rate", "species": "H2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-SEFA-2017", "as_printed": { "value": "1.8e-9", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 1.8e-11 }, "conditions": "Chamber LAIR2, row published as before heat treatment. The only thermal condition applied is the standard bake at 150 C for 72 h that precedes every measurement. Table II of the source. Four nominally identical chambers assembled from standard DN40CF components in SAE 304L, UNS S30403, inner surface area 348 cm2 and volume 0.291 l, cleaned with a commercial detergent in a warm ultrasonic bath, rinsed in deionized water, then in isopropyl alcohol, and blown dry with nitrogen. Copper gaskets of oxygen free high purity copper, about 5 percent of the chamber area. Before every outgassing measurement all chambers were exposed to laboratory air, evacuated and baked at 150 C for 72 h, and the outgassing fluxes were measured for chamber temperatures between 20 and 21 C, a range the source states without a single number, so the measurement temperature is recorded as absent. The method is a rate of rise on a spinning rotor gauge, SI traceable through a NIST calibration of the accommodation coefficient. The total combined uncertainty is about 20 percent at k equal to 2. Published in Pa l/s/cm2 and converted to the canonical unit at build by the exact definition of the units. The source states no pumping time for these readings, only that measurements began once the system had reached a pressure below 1e-7 Pa after the bake.", "contradictions": [], "bake": { "temp_C": 150, "hours": 72, "atmosphere": "vacuum", "_source": "S-SEFA-2017" }, "treatment": "chamber LAIR2, no medium temperature heat treatment" }, { "id": "og-ss304l-n2eq-lair2-before-sefa", "slug": "stainless-316ln", "grade": null, "material_verbatim": "SAE 304L stainless steel chamber LAIR2, before heat treatment", "class": "rate", "species": "N2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-SEFA-2017", "as_printed": { "value": "4.8e-10", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 4.8e-12 }, "conditions": "Chamber LAIR2, row published as before heat treatment. The only thermal condition applied is the standard bake at 150 C for 72 h that precedes every measurement. The nitrogen equivalent flux is not a nitrogen measurement. The source states that more than 95 percent of the desorbed gas was observed to be H2, and that the nitrogen equivalent rate is obtained by assuming the outgassing species is N2 and using the N2 sensitivity factor for the gauge sensitivity in the analysis. It is published to allow comparison with authors who report in nitrogen equivalent, and it is kept here as a separate reading rather than merged with the hydrogen one. Table II of the source. Four nominally identical chambers assembled from standard DN40CF components in SAE 304L, UNS S30403, inner surface area 348 cm2 and volume 0.291 l, cleaned with a commercial detergent in a warm ultrasonic bath, rinsed in deionized water, then in isopropyl alcohol, and blown dry with nitrogen. Copper gaskets of oxygen free high purity copper, about 5 percent of the chamber area. Before every outgassing measurement all chambers were exposed to laboratory air, evacuated and baked at 150 C for 72 h, and the outgassing fluxes were measured for chamber temperatures between 20 and 21 C, a range the source states without a single number, so the measurement temperature is recorded as absent. The method is a rate of rise on a spinning rotor gauge, SI traceable through a NIST calibration of the accommodation coefficient. The total combined uncertainty is about 20 percent at k equal to 2. Published in Pa l/s/cm2 and converted to the canonical unit at build by the exact definition of the units. The source states no pumping time for these readings, only that measurements began once the system had reached a pressure below 1e-7 Pa after the bake.", "contradictions": [], "bake": { "temp_C": 150, "hours": 72, "atmosphere": "vacuum", "_source": "S-SEFA-2017" }, "treatment": "chamber LAIR2, no medium temperature heat treatment" }, { "id": "og-ss304l-h2-vac1-vac430-sefa", "slug": "stainless-316ln", "grade": null, "material_verbatim": "SAE 304L stainless steel chamber VAC1, vacuum bake", "class": "rate", "species": "H2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-SEFA-2017", "as_printed": { "value": "1.9e-11", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 1.9e-13 }, "conditions": "Chamber VAC1, vacuum bake at 430 C for 360 h, under vacuum on the inside and ambient air on the outside. The source distinguishes this medium temperature treatment from vacuum firing, which it defines as placing the whole chamber in a furnace above 950 C, so the state is baked and not vacuum fired. The Fourier number published for this row is 3.24. Table II of the source. Four nominally identical chambers assembled from standard DN40CF components in SAE 304L, UNS S30403, inner surface area 348 cm2 and volume 0.291 l, cleaned with a commercial detergent in a warm ultrasonic bath, rinsed in deionized water, then in isopropyl alcohol, and blown dry with nitrogen. Copper gaskets of oxygen free high purity copper, about 5 percent of the chamber area. Before every outgassing measurement all chambers were exposed to laboratory air, evacuated and baked at 150 C for 72 h, and the outgassing fluxes were measured for chamber temperatures between 20 and 21 C, a range the source states without a single number, so the measurement temperature is recorded as absent. The method is a rate of rise on a spinning rotor gauge, SI traceable through a NIST calibration of the accommodation coefficient. The total combined uncertainty is about 20 percent at k equal to 2. Published in Pa l/s/cm2 and converted to the canonical unit at build by the exact definition of the units. The source states no pumping time for these readings, only that measurements began once the system had reached a pressure below 1e-7 Pa after the bake.", "contradictions": [], "bake": { "temp_C": 150, "hours": 72, "atmosphere": "vacuum", "_source": "S-SEFA-2017" }, "treatment": "chamber VAC1, vacuum bake at 430 C for 360 h, under vacuum on the inside and ambient air on the outside" }, { "id": "og-ss304l-n2eq-vac1-vac430-sefa", "slug": "stainless-316ln", "grade": null, "material_verbatim": "SAE 304L stainless steel chamber VAC1, vacuum bake", "class": "rate", "species": "N2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-SEFA-2017", "as_printed": { "value": "5.1e-12", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 5.1e-14 }, "conditions": "Chamber VAC1, vacuum bake at 430 C for 360 h, under vacuum on the inside and ambient air on the outside. The source distinguishes this medium temperature treatment from vacuum firing, which it defines as placing the whole chamber in a furnace above 950 C, so the state is baked and not vacuum fired. The Fourier number published for this row is 3.24. The nitrogen equivalent flux is not a nitrogen measurement. The source states that more than 95 percent of the desorbed gas was observed to be H2, and that the nitrogen equivalent rate is obtained by assuming the outgassing species is N2 and using the N2 sensitivity factor for the gauge sensitivity in the analysis. It is published to allow comparison with authors who report in nitrogen equivalent, and it is kept here as a separate reading rather than merged with the hydrogen one. Table II of the source. Four nominally identical chambers assembled from standard DN40CF components in SAE 304L, UNS S30403, inner surface area 348 cm2 and volume 0.291 l, cleaned with a commercial detergent in a warm ultrasonic bath, rinsed in deionized water, then in isopropyl alcohol, and blown dry with nitrogen. Copper gaskets of oxygen free high purity copper, about 5 percent of the chamber area. Before every outgassing measurement all chambers were exposed to laboratory air, evacuated and baked at 150 C for 72 h, and the outgassing fluxes were measured for chamber temperatures between 20 and 21 C, a range the source states without a single number, so the measurement temperature is recorded as absent. The method is a rate of rise on a spinning rotor gauge, SI traceable through a NIST calibration of the accommodation coefficient. The total combined uncertainty is about 20 percent at k equal to 2. Published in Pa l/s/cm2 and converted to the canonical unit at build by the exact definition of the units. The source states no pumping time for these readings, only that measurements began once the system had reached a pressure below 1e-7 Pa after the bake.", "contradictions": [], "bake": { "temp_C": 150, "hours": 72, "atmosphere": "vacuum", "_source": "S-SEFA-2017" }, "treatment": "chamber VAC1, vacuum bake at 430 C for 360 h, under vacuum on the inside and ambient air on the outside" }, { "id": "og-ss304l-h2-lair2-lair430-sefa", "slug": "stainless-316ln", "grade": null, "material_verbatim": "SAE 304L stainless steel chamber LAIR2, lab air bake", "class": "rate", "species": "H2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-SEFA-2017", "as_printed": { "value": "1.3e-10", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 1.3e-12 }, "conditions": "Chamber LAIR2, lab air bake at 430 C for 360 h, in laboratory air on both sides. The source distinguishes this medium temperature treatment from vacuum firing, which it defines as placing the whole chamber in a furnace above 950 C, so the state is baked and not vacuum fired. The Fourier number published for this row is 3.24. Table II of the source. Four nominally identical chambers assembled from standard DN40CF components in SAE 304L, UNS S30403, inner surface area 348 cm2 and volume 0.291 l, cleaned with a commercial detergent in a warm ultrasonic bath, rinsed in deionized water, then in isopropyl alcohol, and blown dry with nitrogen. Copper gaskets of oxygen free high purity copper, about 5 percent of the chamber area. Before every outgassing measurement all chambers were exposed to laboratory air, evacuated and baked at 150 C for 72 h, and the outgassing fluxes were measured for chamber temperatures between 20 and 21 C, a range the source states without a single number, so the measurement temperature is recorded as absent. The method is a rate of rise on a spinning rotor gauge, SI traceable through a NIST calibration of the accommodation coefficient. The total combined uncertainty is about 20 percent at k equal to 2. Published in Pa l/s/cm2 and converted to the canonical unit at build by the exact definition of the units. The source states no pumping time for these readings, only that measurements began once the system had reached a pressure below 1e-7 Pa after the bake.", "contradictions": [], "bake": { "temp_C": 150, "hours": 72, "atmosphere": "vacuum", "_source": "S-SEFA-2017" }, "treatment": "chamber LAIR2, lab air bake at 430 C for 360 h, in laboratory air on both sides" }, { "id": "og-ss304l-n2eq-lair2-lair430-sefa", "slug": "stainless-316ln", "grade": null, "material_verbatim": "SAE 304L stainless steel chamber LAIR2, lab air bake", "class": "rate", "species": "N2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-SEFA-2017", "as_printed": { "value": "3.4e-11", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 3.4e-13 }, "conditions": "Chamber LAIR2, lab air bake at 430 C for 360 h, in laboratory air on both sides. The source distinguishes this medium temperature treatment from vacuum firing, which it defines as placing the whole chamber in a furnace above 950 C, so the state is baked and not vacuum fired. The Fourier number published for this row is 3.24. The nitrogen equivalent flux is not a nitrogen measurement. The source states that more than 95 percent of the desorbed gas was observed to be H2, and that the nitrogen equivalent rate is obtained by assuming the outgassing species is N2 and using the N2 sensitivity factor for the gauge sensitivity in the analysis. It is published to allow comparison with authors who report in nitrogen equivalent, and it is kept here as a separate reading rather than merged with the hydrogen one. Table II of the source. Four nominally identical chambers assembled from standard DN40CF components in SAE 304L, UNS S30403, inner surface area 348 cm2 and volume 0.291 l, cleaned with a commercial detergent in a warm ultrasonic bath, rinsed in deionized water, then in isopropyl alcohol, and blown dry with nitrogen. Copper gaskets of oxygen free high purity copper, about 5 percent of the chamber area. Before every outgassing measurement all chambers were exposed to laboratory air, evacuated and baked at 150 C for 72 h, and the outgassing fluxes were measured for chamber temperatures between 20 and 21 C, a range the source states without a single number, so the measurement temperature is recorded as absent. The method is a rate of rise on a spinning rotor gauge, SI traceable through a NIST calibration of the accommodation coefficient. The total combined uncertainty is about 20 percent at k equal to 2. Published in Pa l/s/cm2 and converted to the canonical unit at build by the exact definition of the units. The source states no pumping time for these readings, only that measurements began once the system had reached a pressure below 1e-7 Pa after the bake.", "contradictions": [], "bake": { "temp_C": 150, "hours": 72, "atmosphere": "vacuum", "_source": "S-SEFA-2017" }, "treatment": "chamber LAIR2, lab air bake at 430 C for 360 h, in laboratory air on both sides" }, { "id": "og-ss304l-h2-dair3-dry415-sefa", "slug": "stainless-316ln", "grade": null, "material_verbatim": "SAE 304L stainless steel chamber DAIR3, dry air bake", "class": "rate", "species": "H2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-SEFA-2017", "as_printed": { "value": "3.8e-10", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 3.8e-12 }, "conditions": "Chamber DAIR3, dry air bake at 415 C for 48 h, in clean dry volatile organic compound free air flowing on one side and ambient air on the other. The source distinguishes this medium temperature treatment from vacuum firing, which it defines as placing the whole chamber in a furnace above 950 C, so the state is baked and not vacuum fired. The Fourier number published for this row is 0.36. Table II of the source. Four nominally identical chambers assembled from standard DN40CF components in SAE 304L, UNS S30403, inner surface area 348 cm2 and volume 0.291 l, cleaned with a commercial detergent in a warm ultrasonic bath, rinsed in deionized water, then in isopropyl alcohol, and blown dry with nitrogen. Copper gaskets of oxygen free high purity copper, about 5 percent of the chamber area. Before every outgassing measurement all chambers were exposed to laboratory air, evacuated and baked at 150 C for 72 h, and the outgassing fluxes were measured for chamber temperatures between 20 and 21 C, a range the source states without a single number, so the measurement temperature is recorded as absent. The method is a rate of rise on a spinning rotor gauge, SI traceable through a NIST calibration of the accommodation coefficient. The total combined uncertainty is about 20 percent at k equal to 2. Published in Pa l/s/cm2 and converted to the canonical unit at build by the exact definition of the units. The source states no pumping time for these readings, only that measurements began once the system had reached a pressure below 1e-7 Pa after the bake.", "contradictions": [], "bake": { "temp_C": 150, "hours": 72, "atmosphere": "vacuum", "_source": "S-SEFA-2017" }, "treatment": "chamber DAIR3, dry air bake at 415 C for 48 h, in clean dry volatile organic compound free air flowing on one side and ambient air on the other" }, { "id": "og-ss304l-n2eq-dair3-dry415-sefa", "slug": "stainless-316ln", "grade": null, "material_verbatim": "SAE 304L stainless steel chamber DAIR3, dry air bake", "class": "rate", "species": "N2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-SEFA-2017", "as_printed": { "value": "1e-11", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 1e-13 }, "conditions": "Chamber DAIR3, dry air bake at 415 C for 48 h, in clean dry volatile organic compound free air flowing on one side and ambient air on the other. The source distinguishes this medium temperature treatment from vacuum firing, which it defines as placing the whole chamber in a furnace above 950 C, so the state is baked and not vacuum fired. The Fourier number published for this row is 0.36. The nitrogen equivalent flux is not a nitrogen measurement. The source states that more than 95 percent of the desorbed gas was observed to be H2, and that the nitrogen equivalent rate is obtained by assuming the outgassing species is N2 and using the N2 sensitivity factor for the gauge sensitivity in the analysis. It is published to allow comparison with authors who report in nitrogen equivalent, and it is kept here as a separate reading rather than merged with the hydrogen one. Table II of the source. Four nominally identical chambers assembled from standard DN40CF components in SAE 304L, UNS S30403, inner surface area 348 cm2 and volume 0.291 l, cleaned with a commercial detergent in a warm ultrasonic bath, rinsed in deionized water, then in isopropyl alcohol, and blown dry with nitrogen. Copper gaskets of oxygen free high purity copper, about 5 percent of the chamber area. Before every outgassing measurement all chambers were exposed to laboratory air, evacuated and baked at 150 C for 72 h, and the outgassing fluxes were measured for chamber temperatures between 20 and 21 C, a range the source states without a single number, so the measurement temperature is recorded as absent. The method is a rate of rise on a spinning rotor gauge, SI traceable through a NIST calibration of the accommodation coefficient. The total combined uncertainty is about 20 percent at k equal to 2. Published in Pa l/s/cm2 and converted to the canonical unit at build by the exact definition of the units. The source states no pumping time for these readings, only that measurements began once the system had reached a pressure below 1e-7 Pa after the bake.", "contradictions": [], "bake": { "temp_C": 150, "hours": 72, "atmosphere": "vacuum", "_source": "S-SEFA-2017" }, "treatment": "chamber DAIR3, dry air bake at 415 C for 48 h, in clean dry volatile organic compound free air flowing on one side and ambient air on the other" }, { "id": "og-ss304l-h2-dair4-dry250-sefa", "slug": "stainless-316ln", "grade": null, "material_verbatim": "SAE 304L stainless steel chamber DAIR4, dry air bake", "class": "rate", "species": "H2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-SEFA-2017", "as_printed": { "value": "7.8e-10", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 7.8e-12 }, "conditions": "Chamber DAIR4, dry air bake at 250 C for 48 h, in clean dry volatile organic compound free air flowing on one side and ambient air on the other. The source distinguishes this medium temperature treatment from vacuum firing, which it defines as placing the whole chamber in a furnace above 950 C, so the state is baked and not vacuum fired. The Fourier number published for this row is 0.02. Table II of the source. Four nominally identical chambers assembled from standard DN40CF components in SAE 304L, UNS S30403, inner surface area 348 cm2 and volume 0.291 l, cleaned with a commercial detergent in a warm ultrasonic bath, rinsed in deionized water, then in isopropyl alcohol, and blown dry with nitrogen. Copper gaskets of oxygen free high purity copper, about 5 percent of the chamber area. Before every outgassing measurement all chambers were exposed to laboratory air, evacuated and baked at 150 C for 72 h, and the outgassing fluxes were measured for chamber temperatures between 20 and 21 C, a range the source states without a single number, so the measurement temperature is recorded as absent. The method is a rate of rise on a spinning rotor gauge, SI traceable through a NIST calibration of the accommodation coefficient. The total combined uncertainty is about 20 percent at k equal to 2. Published in Pa l/s/cm2 and converted to the canonical unit at build by the exact definition of the units. The source states no pumping time for these readings, only that measurements began once the system had reached a pressure below 1e-7 Pa after the bake.", "contradictions": [], "bake": { "temp_C": 150, "hours": 72, "atmosphere": "vacuum", "_source": "S-SEFA-2017" }, "treatment": "chamber DAIR4, dry air bake at 250 C for 48 h, in clean dry volatile organic compound free air flowing on one side and ambient air on the other" }, { "id": "og-ss304l-n2eq-dair4-dry250-sefa", "slug": "stainless-316ln", "grade": null, "material_verbatim": "SAE 304L stainless steel chamber DAIR4, dry air bake", "class": "rate", "species": "N2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-SEFA-2017", "as_printed": { "value": "2.1e-10", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 2.1e-12 }, "conditions": "Chamber DAIR4, dry air bake at 250 C for 48 h, in clean dry volatile organic compound free air flowing on one side and ambient air on the other. The source distinguishes this medium temperature treatment from vacuum firing, which it defines as placing the whole chamber in a furnace above 950 C, so the state is baked and not vacuum fired. The Fourier number published for this row is 0.02. The nitrogen equivalent flux is not a nitrogen measurement. The source states that more than 95 percent of the desorbed gas was observed to be H2, and that the nitrogen equivalent rate is obtained by assuming the outgassing species is N2 and using the N2 sensitivity factor for the gauge sensitivity in the analysis. It is published to allow comparison with authors who report in nitrogen equivalent, and it is kept here as a separate reading rather than merged with the hydrogen one. Table II of the source. Four nominally identical chambers assembled from standard DN40CF components in SAE 304L, UNS S30403, inner surface area 348 cm2 and volume 0.291 l, cleaned with a commercial detergent in a warm ultrasonic bath, rinsed in deionized water, then in isopropyl alcohol, and blown dry with nitrogen. Copper gaskets of oxygen free high purity copper, about 5 percent of the chamber area. Before every outgassing measurement all chambers were exposed to laboratory air, evacuated and baked at 150 C for 72 h, and the outgassing fluxes were measured for chamber temperatures between 20 and 21 C, a range the source states without a single number, so the measurement temperature is recorded as absent. The method is a rate of rise on a spinning rotor gauge, SI traceable through a NIST calibration of the accommodation coefficient. The total combined uncertainty is about 20 percent at k equal to 2. Published in Pa l/s/cm2 and converted to the canonical unit at build by the exact definition of the units. The source states no pumping time for these readings, only that measurements began once the system had reached a pressure below 1e-7 Pa after the bake.", "contradictions": [], "bake": { "temp_C": 150, "hours": 72, "atmosphere": "vacuum", "_source": "S-SEFA-2017" }, "treatment": "chamber DAIR4, dry air bake at 250 C for 48 h, in clean dry volatile organic compound free air flowing on one side and ambient air on the other" }, { "id": "og-ss304l-h2-vac1-dry430-sefa", "slug": "stainless-316ln", "grade": null, "material_verbatim": "SAE 304L stainless steel chamber VAC1, dry air bake", "class": "rate", "species": "H2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-SEFA-2017", "as_printed": { "value": "1.1e-11", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 1.1e-13 }, "conditions": "Chamber VAC1, dry air bake at 430 C for 24 h, in clean dry volatile organic compound free air flowing on one side and ambient air on the other. The source distinguishes this medium temperature treatment from vacuum firing, which it defines as placing the whole chamber in a furnace above 950 C, so the state is baked and not vacuum fired. The Fourier number published for this row is 3.46, which the source states combines the first bake at 430 C for 360 h with the second in dry air at 430 C for 24 h. Table II of the source. Four nominally identical chambers assembled from standard DN40CF components in SAE 304L, UNS S30403, inner surface area 348 cm2 and volume 0.291 l, cleaned with a commercial detergent in a warm ultrasonic bath, rinsed in deionized water, then in isopropyl alcohol, and blown dry with nitrogen. Copper gaskets of oxygen free high purity copper, about 5 percent of the chamber area. Before every outgassing measurement all chambers were exposed to laboratory air, evacuated and baked at 150 C for 72 h, and the outgassing fluxes were measured for chamber temperatures between 20 and 21 C, a range the source states without a single number, so the measurement temperature is recorded as absent. The method is a rate of rise on a spinning rotor gauge, SI traceable through a NIST calibration of the accommodation coefficient. The total combined uncertainty is about 20 percent at k equal to 2. Published in Pa l/s/cm2 and converted to the canonical unit at build by the exact definition of the units. The source states no pumping time for these readings, only that measurements began once the system had reached a pressure below 1e-7 Pa after the bake.", "contradictions": [], "bake": { "temp_C": 150, "hours": 72, "atmosphere": "vacuum", "_source": "S-SEFA-2017" }, "treatment": "chamber VAC1, dry air bake at 430 C for 24 h, in clean dry volatile organic compound free air flowing on one side and ambient air on the other" }, { "id": "og-ss304l-n2eq-vac1-dry430-sefa", "slug": "stainless-316ln", "grade": null, "material_verbatim": "SAE 304L stainless steel chamber VAC1, dry air bake", "class": "rate", "species": "N2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "_source": "S-SEFA-2017", "as_printed": { "value": "3e-12", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 3e-14 }, "conditions": "Chamber VAC1, dry air bake at 430 C for 24 h, in clean dry volatile organic compound free air flowing on one side and ambient air on the other. The source distinguishes this medium temperature treatment from vacuum firing, which it defines as placing the whole chamber in a furnace above 950 C, so the state is baked and not vacuum fired. The Fourier number published for this row is 3.46, which the source states combines the first bake at 430 C for 360 h with the second in dry air at 430 C for 24 h. The nitrogen equivalent flux is not a nitrogen measurement. The source states that more than 95 percent of the desorbed gas was observed to be H2, and that the nitrogen equivalent rate is obtained by assuming the outgassing species is N2 and using the N2 sensitivity factor for the gauge sensitivity in the analysis. It is published to allow comparison with authors who report in nitrogen equivalent, and it is kept here as a separate reading rather than merged with the hydrogen one. Table II of the source. Four nominally identical chambers assembled from standard DN40CF components in SAE 304L, UNS S30403, inner surface area 348 cm2 and volume 0.291 l, cleaned with a commercial detergent in a warm ultrasonic bath, rinsed in deionized water, then in isopropyl alcohol, and blown dry with nitrogen. Copper gaskets of oxygen free high purity copper, about 5 percent of the chamber area. Before every outgassing measurement all chambers were exposed to laboratory air, evacuated and baked at 150 C for 72 h, and the outgassing fluxes were measured for chamber temperatures between 20 and 21 C, a range the source states without a single number, so the measurement temperature is recorded as absent. The method is a rate of rise on a spinning rotor gauge, SI traceable through a NIST calibration of the accommodation coefficient. The total combined uncertainty is about 20 percent at k equal to 2. Published in Pa l/s/cm2 and converted to the canonical unit at build by the exact definition of the units. The source states no pumping time for these readings, only that measurements began once the system had reached a pressure below 1e-7 Pa after the bake.", "contradictions": [], "bake": { "temp_C": 150, "hours": 72, "atmosphere": "vacuum", "_source": "S-SEFA-2017" }, "treatment": "chamber VAC1, dry air bake at 430 C for 24 h, in clean dry volatile organic compound free air flowing on one side and ambient air on the other" }, { "id": "og-ss304l-dair3-n2eq-ratio-sefa", "slug": "stainless-316ln", "grade": null, "material_verbatim": "SAE 304L stainless steel chamber DAIR3, dry air bake at 415 C for 48 h", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "The nitrogen equivalent flux published for chamber DAIR3 does not follow the ratio the six other rows of the same table follow.", "motif": "Not a reading problem. The cell was read twice, in the text layer and on a 400 dpi raster, and both give 1.0e-11 Pa l/s/cm2 against 3.8e-10 for hydrogen on the same row. The six other rows of table II give a hydrogen over nitrogen equivalent ratio between 3.67 and 3.83, and this row gives 38.0, ten times higher. The value is written into the base exactly as printed, and this declaration records the arithmetic so that a reader who compares the columns sees what the table does. Only the source can say whether the printed exponent is the one intended.", "_source": "S-SEFA-2017", "contradictions": [] }, { "id": "og-vitreous-carbon-monolayers-nasa", "slug": "carbon-family", "grade": null, "material_verbatim": "Vitreous Carbon, Beckwith Carbon Corp., Van Nuys, California", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "Monolayers evolved on outgassing to 2000 K, H2 0.2, CO 0.08, CH4 much less than 1, C2H6 much less than 1. Adsorption probabilities at 300 K, H2 5e-7, CO 5e-4, O2 about 3e-9, N2 less than 5e-7.", "motif": "A quantity of gas evolved in monolayers is not a rate per unit area. It has no time in it, and it cannot be converted into the canonical unit of this corpus by any factor. The corpus carries no field for a quantity of gas evolved on heating, so the numbers are recorded verbatim in the text of this declaration and no value field is filled. Converting them would invent a pumping time that the source never published.", "_source": "S-NASA-CR-2101", "contradictions": [], "conditions": "Table I of the source, vacuum characteristics of carbons. The first four columns give the gas evolved on outgassing to 2000 K in monolayers evolved, and the last four give adsorption probabilities at 300 K. Samples were initially outgassed above 2000 K, exposed to laboratory air for several hours at room temperature, then tested in ultrahigh vacuum near 1e-10 Torr following a normal 24 hour bake at 300 C. Heating was by electrical conduction in increments of about 100 K up to 2000 K, with flashes of 4 s. The source defines one monolayer as 5e14 molecules/cm2 in a footnote on page 11." }, { "id": "og-pyrolytic-graphite-monolayers-nasa", "slug": "carbon-family", "grade": null, "material_verbatim": "Pyrolytic Graphite, Super Temp, Santa Fe Springs, California", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "Monolayers evolved on outgassing to 2000 K, H2 1.7, CO 0.4, CH4 0.25, C2H6 0.12. Adsorption probabilities at 300 K, H2 5e-6, CO 1e-5, O2 not measured, N2 less than 1e-7.", "motif": "A quantity of gas evolved in monolayers is not a rate per unit area. It has no time in it, and it cannot be converted into the canonical unit of this corpus by any factor. The corpus carries no field for a quantity of gas evolved on heating, so the numbers are recorded verbatim in the text of this declaration and no value field is filled. Converting them would invent a pumping time that the source never published.", "_source": "S-NASA-CR-2101", "contradictions": [], "conditions": "Table I of the source, vacuum characteristics of carbons. The first four columns give the gas evolved on outgassing to 2000 K in monolayers evolved, and the last four give adsorption probabilities at 300 K. Samples were initially outgassed above 2000 K, exposed to laboratory air for several hours at room temperature, then tested in ultrahigh vacuum near 1e-10 Torr following a normal 24 hour bake at 300 C. Heating was by electrical conduction in increments of about 100 K up to 2000 K, with flashes of 4 s. The source defines one monolayer as 5e14 molecules/cm2 in a footnote on page 11." }, { "id": "og-grafoil-monolayers-nasa", "slug": "carbon-family", "grade": null, "material_verbatim": "Grafoil, Union Carbide, New York, New York", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "Monolayers evolved on outgassing to 2000 K, H2 20.0, CO 1.2, CH4 3.0, C2H6 2.0. Adsorption probabilities at 300 K, H2 1.5e-3, CO 1e-2, O2 not measured, N2 less than 1e-5.", "motif": "A quantity of gas evolved in monolayers is not a rate per unit area. It has no time in it, and it cannot be converted into the canonical unit of this corpus by any factor. The corpus carries no field for a quantity of gas evolved on heating, so the numbers are recorded verbatim in the text of this declaration and no value field is filled. Converting them would invent a pumping time that the source never published.", "_source": "S-NASA-CR-2101", "contradictions": [], "conditions": "Table I of the source, vacuum characteristics of carbons. The first four columns give the gas evolved on outgassing to 2000 K in monolayers evolved, and the last four give adsorption probabilities at 300 K. Samples were initially outgassed above 2000 K, exposed to laboratory air for several hours at room temperature, then tested in ultrahigh vacuum near 1e-10 Torr following a normal 24 hour bake at 300 C. Heating was by electrical conduction in increments of about 100 K up to 2000 K, with flashes of 4 s. The source defines one monolayer as 5e14 molecules/cm2 in a footnote on page 11." }, { "id": "og-pyrolyzed-kynol-monolayers-nasa", "slug": null, "grade": null, "material_verbatim": "Pyrolyzed Kynol, Carborundum Co., Sanborn, New York", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "Monolayers evolved on outgassing to 2000 K, H2 2.0, CO 10.0, CH4 much less than 1, C2H6 much less than 1. No adsorption probability is published for this material.", "motif": "A quantity of gas evolved in monolayers is not a rate per unit area. It has no time in it, and it cannot be converted into the canonical unit of this corpus by any factor. The corpus carries no field for a quantity of gas evolved on heating, so the numbers are recorded verbatim in the text of this declaration and no value field is filled. Converting them would invent a pumping time that the source never published.", "_source": "S-NASA-CR-2101", "contradictions": [], "conditions": "Table I of the source, vacuum characteristics of carbons. The first four columns give the gas evolved on outgassing to 2000 K in monolayers evolved, and the last four give adsorption probabilities at 300 K. Samples were initially outgassed above 2000 K, exposed to laboratory air for several hours at room temperature, then tested in ultrahigh vacuum near 1e-10 Torr following a normal 24 hour bake at 300 C. Heating was by electrical conduction in increments of about 100 K up to 2000 K, with flashes of 4 s. The source defines one monolayer as 5e14 molecules/cm2 in a footnote on page 11. The card Graphite, pyrolytic graphite, glassy carbon names three forms of carbon and a pyrolyzed phenolic fiber yarn is not one of them, so the slug is null rather than stretched." }, { "id": "og-graphite-gauge-rate-nasa", "slug": "carbon-family", "grade": null, "material_verbatim": "All carbon triode gauge, collector, grid and supports in Grafoil and pyrolytic graphite", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "The source states that after the normal system bake-out of 300 C for 24 hr the system pressure fell below 1e-10 Torr, indicating that the graphite gauge at room temperature had a nonmeasurable outgassing rate, and that when operated as a gauge with 0.3 mA emission, 150 V filament to grid and 37 W filament power, the gauge had an outgassing rate of about 5e-9 torr l/cm2.", "motif": "The printed unit has no time in it. A rate per unit area is torr l per second per cm2 and the source prints torr l/cm2, so the reading is certain and the unit is not. The rule of this campaign is that a value whose unit is not certain is not written, and this one is not. The operating condition is also not a material condition, since the source expects the 37 W to raise the grid and collector to about 750 K, 130 K above the bake-out temperature.", "_source": "S-NASA-CR-2101", "contradictions": [], "conditions": "Section on gauge testing, page 21 of the report. Read on a 400 dpi raster of the scanned page, where the unit is printed as torr l/cm2 with no per second." }, { "id": "og-ss-h2-lattice-diffusion-bacher", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Austenitic stainless steel, 316LN ESR", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "By applying heating rates of 1, or 5, or 15 C/min the common 480 C peak may be unambiguously attributed to diffusible interstitial hydrogen, and an activation energy for lattice diffusion of 0.52 plus or minus 0.04 eV may be obtained.", "motif": "The source publishes its hydrogen outgassing rates as desorption spectra against temperature in figures 3, 4, 5, 9, 10, 11 and 12, and tabulates none of them. Reading a number off a plotted curve is not reading a published value, so no value field is filled. Tables I and II of the source carry chemical compositions and grain sizes, which are not outgassing rates and have no field in this corpus.", "_source": "S-BACHER-2003", "contradictions": [], "conditions": "Seven austenitic stainless steels studied by thermal desorption spectroscopy on two setups, S1 and S2. The grades are 316L ARC plus AOD, 316L ARC plus AOD plus ESR, 316LN ARC plus AOD plus ESR, 316Ti ARC plus AOD, 318 ARC plus AOD, 318 ARC plus AOD plus ESR and X20MDW ARC plus AOD plus ESR. Mean grain sizes as received are 62, 44, 44, 31, 31, 31 and 22 micrometres in the same order. The total hydrogen content measured by argon carrier fusion is between 1 and 7 wt.ppm. Sample roughness Ra was 1.6 micrometres of N7 type. The accuracy of the outgassing rate measurements is stated as plus or minus 20 percent and of the temperature as plus or minus 10 C.", "diffusion": { "D0_cm2_s": null, "Ea_eV": 0.52, "_source": "S-BACHER-2003", "note": "Activation energy for lattice diffusion of hydrogen, obtained from the shift of the 480 C desorption peak with the heating rate. The source publishes no prefactor for it and states the value is in close agreement with literature data. The source separately assumes a diffusion coefficient of 2e-6 cm2/s for hydrogen in austenitic stainless steel at 500 C, taken from the literature, to justify a uniform charging of its samples." } }, { "id": "og-ss-h2-carbide-trapping-bacher", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Austenitic stainless steel, 316Ti ARC plus AOD", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "The peak observed at 600 C is ascribed to hydrogen detrapping from titanium carbides and nitrides in the as received Ti stabilized stainless steel samples. Heating cycles at 1, or 5, or 15 C/min give an activation energy of 1.7 plus or minus 0.05 eV, which the source states is larger than the activation energy reported for hydrogen trapping to Cr23C6 carbides in face-centered cubic iron and nickel base alloys.", "motif": "A trapping energy is not a diffusion coefficient and not an outgassing rate. The diffusion block of this corpus holds an Arrhenius law for a diffusion coefficient or a coefficient measured at one temperature, and neither form carries a detrapping energy, so the number is recorded verbatim in this text and no block is filled with it. The source publishes its hydrogen outgassing rates as desorption spectra against temperature in figures 3, 4, 5, 9, 10, 11 and 12, and tabulates none of them. Reading a number off a plotted curve is not reading a published value, so no value field is filled. Tables I and II of the source carry chemical compositions and grain sizes, which are not outgassing rates and have no field in this corpus.", "_source": "S-BACHER-2003", "contradictions": [], "conditions": "Seven austenitic stainless steels studied by thermal desorption spectroscopy on two setups, S1 and S2. The grades are 316L ARC plus AOD, 316L ARC plus AOD plus ESR, 316LN ARC plus AOD plus ESR, 316Ti ARC plus AOD, 318 ARC plus AOD, 318 ARC plus AOD plus ESR and X20MDW ARC plus AOD plus ESR. Mean grain sizes as received are 62, 44, 44, 31, 31, 31 and 22 micrometres in the same order. The total hydrogen content measured by argon carrier fusion is between 1 and 7 wt.ppm. Sample roughness Ra was 1.6 micrometres of N7 type. The accuracy of the outgassing rate measurements is stated as plus or minus 20 percent and of the temperature as plus or minus 10 C." }, { "id": "og-ss-vacuum-firing-depletion-bacher", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Austenitic stainless steel, 316LN ESR", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "Vacuum firing, as usually applied at 950 C for 2 h, has been confirmed to be a powerful way to decrease the hydrogen content, down to 0.5 percent of the initial value for the 1 mm thick tested samples. The hydrogen pressure during the treatment was about 1e-5 Torr, and the source states that the total quantity of hydrogen released after this treatment is 200 times lower than for the as received sample.", "motif": "A residual hydrogen content is not an outgassing rate. The source publishes a depletion factor and the spectra that produce it, and no rate per unit area for the fired samples. Writing this fact as a value would need a conversion from a content to a rate that the source does not make and this corpus does not invent. The source publishes its hydrogen outgassing rates as desorption spectra against temperature in figures 3, 4, 5, 9, 10, 11 and 12, and tabulates none of them. Reading a number off a plotted curve is not reading a published value, so no value field is filled. Tables I and II of the source carry chemical compositions and grain sizes, which are not outgassing rates and have no field in this corpus.", "_source": "S-BACHER-2003", "contradictions": [], "conditions": "Seven austenitic stainless steels studied by thermal desorption spectroscopy on two setups, S1 and S2. The grades are 316L ARC plus AOD, 316L ARC plus AOD plus ESR, 316LN ARC plus AOD plus ESR, 316Ti ARC plus AOD, 318 ARC plus AOD, 318 ARC plus AOD plus ESR and X20MDW ARC plus AOD plus ESR. Mean grain sizes as received are 62, 44, 44, 31, 31, 31 and 22 micrometres in the same order. The total hydrogen content measured by argon carrier fusion is between 1 and 7 wt.ppm. Sample roughness Ra was 1.6 micrometres of N7 type. The accuracy of the outgassing rate measurements is stated as plus or minus 20 percent and of the temperature as plus or minus 10 C." }, { "id": "og-ss-air-bake-450-bacher", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Austenitic stainless steel, 316LN ESR", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "Samples baked in air at 450 C for 24 and 100 h show a 20 percent reduction of the hydrogen content after 24 h and 50 percent after 100 h. The source states that this treatment does not lead to a spectacular reduction of the hydrogen content but that the form of the desorption curve is strongly modified, the 480 C peak typical of as received samples being reduced while a new sharper peak appears at 630 C. The conclusion of the source is that baking in air would not be a wise choice for particle accelerator vacuum chambers, because the outgassing induced by radiation or particle bombardment originates in the surface oxide layer that the air bake grows.", "motif": "A percentage of hydrogen removed is not an outgassing rate, and the source tabulates no rate for these samples. The source publishes its hydrogen outgassing rates as desorption spectra against temperature in figures 3, 4, 5, 9, 10, 11 and 12, and tabulates none of them. Reading a number off a plotted curve is not reading a published value, so no value field is filled. Tables I and II of the source carry chemical compositions and grain sizes, which are not outgassing rates and have no field in this corpus.", "_source": "S-BACHER-2003", "contradictions": [], "conditions": "Seven austenitic stainless steels studied by thermal desorption spectroscopy on two setups, S1 and S2. The grades are 316L ARC plus AOD, 316L ARC plus AOD plus ESR, 316LN ARC plus AOD plus ESR, 316Ti ARC plus AOD, 318 ARC plus AOD, 318 ARC plus AOD plus ESR and X20MDW ARC plus AOD plus ESR. Mean grain sizes as received are 62, 44, 44, 31, 31, 31 and 22 micrometres in the same order. The total hydrogen content measured by argon carrier fusion is between 1 and 7 wt.ppm. Sample roughness Ra was 1.6 micrometres of N7 type. The accuracy of the outgassing rate measurements is stated as plus or minus 20 percent and of the temperature as plus or minus 10 C." }, { "id": "og-ss-vacuum-bake-300-bacher", "slug": "stainless-316ln", "grade": null, "material_verbatim": "Austenitic stainless steel, 316LN ESR, 1 mm thick", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "In situ vacuum baking is preferable to air baking and is more effective in reducing the hydrogen content, particularly when most of the residual hydrogen is diffusible. Heating for 12 h at 300 C removed about 70 percent of the hydrogen initially present in the tested 316LN sample, 1 mm thick.", "motif": "A percentage of hydrogen removed is not an outgassing rate, and the source publishes the corresponding fractions as a figure. The source publishes its hydrogen outgassing rates as desorption spectra against temperature in figures 3, 4, 5, 9, 10, 11 and 12, and tabulates none of them. Reading a number off a plotted curve is not reading a published value, so no value field is filled. Tables I and II of the source carry chemical compositions and grain sizes, which are not outgassing rates and have no field in this corpus.", "_source": "S-BACHER-2003", "contradictions": [], "conditions": "Seven austenitic stainless steels studied by thermal desorption spectroscopy on two setups, S1 and S2. The grades are 316L ARC plus AOD, 316L ARC plus AOD plus ESR, 316LN ARC plus AOD plus ESR, 316Ti ARC plus AOD, 318 ARC plus AOD, 318 ARC plus AOD plus ESR and X20MDW ARC plus AOD plus ESR. Mean grain sizes as received are 62, 44, 44, 31, 31, 31 and 22 micrometres in the same order. The total hydrogen content measured by argon carrier fusion is between 1 and 7 wt.ppm. Sample roughness Ra was 1.6 micrometres of N7 type. The accuracy of the outgassing rate measurements is stated as plus or minus 20 percent and of the temperature as plus or minus 10 C." }, { "id": "og-alumina-coated-ss304l-total-25c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 25, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "2.3", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 2.3e-13 }, "conditions": "Row at 25 C, column total, published as 2.3 times 1e-13 with an error estimate of 1.2 times 1e-13. The total and the hydrogen reading of this row cross, 2.3 against 4.9, and the source publishes them that way. The two come from different instruments, the total from the gauge and the species from the residual gas analyser, and their error estimates overlap. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-h2-25c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "H2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 25, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "4.9", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 4.9e-13 }, "conditions": "Row at 25 C, column H2, published as 4.9 times 1e-13 with an error estimate of 2.5 times 1e-13. The total and the hydrogen reading of this row cross, 2.3 against 4.9, and the source publishes them that way. The two come from different instruments, the total from the gauge and the species from the residual gas analyser, and their error estimates overlap. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-total-60c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 60, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "60.0", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 6e-12 }, "conditions": "Row at 60 C, column total, published as 60.0 times 1e-13 with an error estimate of 6 times 1e-13. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-h2-60c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "H2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 60, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "60.0", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 6e-12 }, "conditions": "Row at 60 C, column H2, published as 60.0 times 1e-13 with an error estimate of 12 times 1e-13. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-co-60c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "CO", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 60, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "0.04", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 4e-15 }, "conditions": "Row at 60 C, column CO, published as 0.04 times 1e-13 with an error estimate of plus 0.05 and minus 0.04 times 1e-13. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-total-100c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 100, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "480.0", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 4.8e-11 }, "conditions": "Row at 100 C, column total, published as 480.0 times 1e-13 with an error estimate of 40 times 1e-13. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-h2-100c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "H2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 100, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "450.0", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 4.5e-11 }, "conditions": "Row at 100 C, column H2, published as 450.0 times 1e-13 with an error estimate of 70 times 1e-13. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-ch4-100c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "CH4", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 100, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "0.4", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 4e-14 }, "conditions": "Row at 100 C, column CH4, published as 0.4 times 1e-13 with an error estimate of 0.4 times 1e-13. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-co-100c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "CO", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 100, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "0.4", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 4e-14 }, "conditions": "Row at 100 C, column CO, published as 0.4 times 1e-13 with an error estimate of 0.3 times 1e-13. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-co2-100c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "CO2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 100, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "0.04", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 4e-15 }, "conditions": "Row at 100 C, column CO2, published as 0.04 times 1e-13 with an error estimate of 0.04 times 1e-13. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-total-150c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 150, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "3480.0", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 3.48e-10 }, "conditions": "Row at 150 C, column total, published as 3480.0 times 1e-13 with an error estimate of 260 times 1e-13. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-h2-150c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "H2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 150, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "3540.0", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 3.54e-10 }, "conditions": "Row at 150 C, column H2, published as 3540.0 times 1e-13 with an error estimate of 510 times 1e-13. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-ch4-150c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "CH4", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 150, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "3.9", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 3.9e-13 }, "conditions": "Row at 150 C, column CH4, published as 3.9 times 1e-13 with an error estimate of 3.1 times 1e-13. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-co-150c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "CO", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 150, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "4.4", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 4.4e-13 }, "conditions": "Row at 150 C, column CO, published as 4.4 times 1e-13 with an error estimate of 3.4 times 1e-13. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-co2-150c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "CO2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 150, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "1.2", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 1.2e-13 }, "conditions": "Row at 150 C, column CO2, published as 1.2 times 1e-13 with an error estimate of 0.2 times 1e-13. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-total-200c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 200, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "9200.0", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 9.2e-10 }, "conditions": "Row at 200 C, column total, published as 9200.0 times 1e-13 with an error estimate of 700 times 1e-13. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-h2-200c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "H2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 200, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "8600.0", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 8.6e-10 }, "conditions": "Row at 200 C, column H2, published as 8600.0 times 1e-13 with an error estimate of 1200 times 1e-13. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-ch4-200c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "CH4", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 200, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "33.0", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 3.3e-12 }, "conditions": "Row at 200 C, column CH4, published as 33.0 times 1e-13 with an error estimate of 26 times 1e-13. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-co-200c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "CO", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 200, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "53.0", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 5.3e-12 }, "conditions": "Row at 200 C, column CO, published as 53.0 times 1e-13 with an error estimate of 37 times 1e-13. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-alumina-coated-ss304l-co2-200c-thesis", "slug": null, "grade": null, "material_verbatim": "Plasma sprayed 100 percent fine alumina coating on stainless steel 304L", "class": "rate", "species": "CO2", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 200, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "7.1", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 7.1e-13 }, "conditions": "Row at 200 C, column CO2, published as 7.1 times 1e-13 with an error estimate of 2.9 times 1e-13. Table 13 of the thesis. Three samples of total surface area 162 plus or minus 2 cm2, each 2 mm thick, coating thickness unreported but stated to be less than 300 micrometres, cleaned with Net-Inox because the treatment has to be the one applied to the tanks. Accumulation system. The system was pumped down for 24 h, baked 39 h at 250 C and 2 h at 150 C, cooled to 25 C, and at least 48 h were waited before starting the accumulation test, then six accumulation tests were performed at each of 25, 60, 100, 150 and 200 C. The thesis publishes no elapsed pumping time for the readings themselves. Rates are published in hPa l/(s cm2), which is the canonical unit of this corpus under another spelling, so the conversion factor is one. Pressures and rates are nitrogen equivalent, the nitrogen equivalent pumping speed of the orifice being used regardless of the dominant species, as the thesis states. The measurement is the coated assembly and not bulk alumina, and the thesis states that the hydrogen activation energy it obtains, 0.50 plus or minus 0.06 eV, is close to the 0.57 eV reported for type 304 stainless steel and that it is possible that the outgassing originated also by diffusion from the substrate. For that reason no card of The Matter is claimed and the slug is null.", "contradictions": [], "bake": { "temp_C": 250, "hours": 39, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 39 h at 250 C and 2 h at 150 C in the accumulation system before the tests" }, { "id": "og-macor-total-25c-thesis", "slug": "macor", "grade": null, "material_verbatim": "Macor machinable glass ceramic rods", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 25, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "bound": "less_than", "as_printed": { "value": "5.2", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 5.2e-13 }, "conditions": "Row at 25 C of the Macor column, published as less than 5.2 times 1e-13. Table 15 of the thesis. Five Macor rods of total surface area 110 cm2 in the accumulation system, baked 24 h at 250 C and 21 h at 150 C. Because the outgassing sits so close to the background, the thesis states that it is more reasonable to estimate maximum possible outgassing rates, obtained by assuming an outgassing of 50 percent of the background, since samples outgassing more than half the background would have been surely distinct in the tests. The value is therefore a bound and stays a bound. Rates are published in hPa l/(s cm2), the canonical unit under another spelling, and are nitrogen equivalent. The thesis publishes no elapsed pumping time for the readings.", "contradictions": [], "bake": { "temp_C": 250, "hours": 24, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 24 h at 250 C and 21 h at 150 C in the accumulation system before the tests" }, { "id": "og-macor-total-60c-thesis", "slug": "macor", "grade": null, "material_verbatim": "Macor machinable glass ceramic rods", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 60, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "bound": "less_than", "as_printed": { "value": "9.1", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 9.1e-13 }, "conditions": "Row at 60 C of the Macor column, published as less than 9.1 times 1e-13. Table 15 of the thesis. Five Macor rods of total surface area 110 cm2 in the accumulation system, baked 24 h at 250 C and 21 h at 150 C. Because the outgassing sits so close to the background, the thesis states that it is more reasonable to estimate maximum possible outgassing rates, obtained by assuming an outgassing of 50 percent of the background, since samples outgassing more than half the background would have been surely distinct in the tests. The value is therefore a bound and stays a bound. Rates are published in hPa l/(s cm2), the canonical unit under another spelling, and are nitrogen equivalent. The thesis publishes no elapsed pumping time for the readings.", "contradictions": [], "bake": { "temp_C": 250, "hours": 24, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 24 h at 250 C and 21 h at 150 C in the accumulation system before the tests" }, { "id": "og-macor-total-100c-thesis", "slug": "macor", "grade": null, "material_verbatim": "Macor machinable glass ceramic rods", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 100, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "bound": "less_than", "as_printed": { "value": "15.0", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 1.5e-12 }, "conditions": "Row at 100 C of the Macor column, published as less than 15.0 times 1e-13. Table 15 of the thesis. Five Macor rods of total surface area 110 cm2 in the accumulation system, baked 24 h at 250 C and 21 h at 150 C. Because the outgassing sits so close to the background, the thesis states that it is more reasonable to estimate maximum possible outgassing rates, obtained by assuming an outgassing of 50 percent of the background, since samples outgassing more than half the background would have been surely distinct in the tests. The value is therefore a bound and stays a bound. Rates are published in hPa l/(s cm2), the canonical unit under another spelling, and are nitrogen equivalent. The thesis publishes no elapsed pumping time for the readings.", "contradictions": [], "bake": { "temp_C": 250, "hours": 24, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 24 h at 250 C and 21 h at 150 C in the accumulation system before the tests" }, { "id": "og-macor-total-150c-thesis", "slug": "macor", "grade": null, "material_verbatim": "Macor machinable glass ceramic rods", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 150, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "bound": "less_than", "as_printed": { "value": "32.0", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 3.2e-12 }, "conditions": "Row at 150 C of the Macor column, published as less than 32.0 times 1e-13. Table 15 of the thesis. Five Macor rods of total surface area 110 cm2 in the accumulation system, baked 24 h at 250 C and 21 h at 150 C. Because the outgassing sits so close to the background, the thesis states that it is more reasonable to estimate maximum possible outgassing rates, obtained by assuming an outgassing of 50 percent of the background, since samples outgassing more than half the background would have been surely distinct in the tests. The value is therefore a bound and stays a bound. Rates are published in hPa l/(s cm2), the canonical unit under another spelling, and are nitrogen equivalent. The thesis publishes no elapsed pumping time for the readings.", "contradictions": [], "bake": { "temp_C": 250, "hours": 24, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 24 h at 250 C and 21 h at 150 C in the accumulation system before the tests" }, { "id": "og-tungsten-total-25c-thesis", "slug": "tungsten", "grade": null, "material_verbatim": "Tungsten plates", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 25, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "bound": "less_than", "as_printed": { "value": "2.7", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 2.7e-13 }, "conditions": "Row at 25 C of the tungsten column, published as less than 2.7 times 1e-13, an upper estimate obtained by assuming an outgassing of 50 percent of the background. Table 15 of the thesis. Four tungsten plates of total surface area 216 cm2 in the accumulation system, baked 24 h at 250 C and 22 h at 150 C. Rates are published in hPa l/(s cm2), the canonical unit under another spelling, and are nitrogen equivalent. The thesis publishes no elapsed pumping time for the readings. At 60 C and 100 C only tentative tests were made and the thesis states the measurements were cancelled because the outgassing was too low to distinguish.", "contradictions": [], "bake": { "temp_C": 250, "hours": 24, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 24 h at 250 C and 22 h at 150 C in the accumulation system before the tests" }, { "id": "og-tungsten-total-200c-thesis", "slug": "tungsten", "grade": null, "material_verbatim": "Tungsten plates", "class": "rate", "species": "total", "state": "baked", "measurement": { "method": "accumulation", "temp_C": 200, "pumping_time_h": "not-stated" }, "value": { "_source": "S-CERN-THESIS-2019-061", "as_printed": { "value": "330", "multiplier": "1e-13", "unit_printed": "hPa l/(s cm2)", "unit": "hpa_l_s_cm2" }, "q_mbar_l_s_cm2": 3.3e-11 }, "conditions": "Row at 200 C of the tungsten column, published as 330 times 1e-13. This is the only tungsten row that is not a bound, and the thesis states that at 200 C a clear difference from the background allowed the outgassing rate to be estimated. Table 15 of the thesis. Four tungsten plates of total surface area 216 cm2 in the accumulation system, baked 24 h at 250 C and 22 h at 150 C. Rates are published in hPa l/(s cm2), the canonical unit under another spelling, and are nitrogen equivalent. The thesis publishes no elapsed pumping time for the readings. At 60 C and 100 C only tentative tests were made and the thesis states the measurements were cancelled because the outgassing was too low to distinguish.", "contradictions": [], "bake": { "temp_C": 250, "hours": 24, "atmosphere": "vacuum", "_source": "S-CERN-THESIS-2019-061" }, "treatment": "baked 24 h at 250 C and 22 h at 150 C in the accumulation system before the tests" }, { "id": "og-vespel-sp1-fits-thesis", "slug": null, "grade": null, "material_verbatim": "Vespel SP-1, unbaked, throughput system", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "Table 8 of the thesis gives nonlinear least square fit coefficients for the Vespel SP-1 outgassing rate at each temperature, in hPa l/(s cm2). At 30 C the model is q equal to a times t to the power b with a 5.799e-6, b minus 0.4917 and R squared 0.9985. At 60 C the same model gives a 4.528e-4, b minus 1.205 and R squared 0.9895. At 100 C the model is q equal to a times the exponential of b times t, with a 1.069e-5, b minus 0.007112 and R squared 0.9982. At 150 C the same exponential model gives a 5.601e-4, b minus 0.01575 and R squared 0.9985. At 200 C it gives a 43.81, b minus 0.04035 and R squared 0.9989.", "motif": "Two reasons, and either one is enough. The law block of this corpus admits a power form and a double power form and no exponential form, so three of the five rows have no shape to be written in. And the law block requires a validity range, t_min and t_max, which the source does not publish for any of the five fits, stating only that suitable fits were found for the entire time interval at each temperature. The table also states no unit for the time variable. A law without a declared range is an invitation to extrapolate, and the corpus refuses it.", "_source": "S-CERN-THESIS-2019-061", "contradictions": [], "conditions": "Throughput system, five Vespel SP-1 samples measured for 100 hours at each of 30, 60, 100, 150 and 200 C after 6 hours of evacuation, the sample chamber alone being heated at 50 C/h. The thesis states that the exponent at 30 C, minus 0.49, is compatible with a diffusion model, and that shifting the 60 C values by 74 hours towards the start of the pumpdown gives an exponent of minus 0.516 with R squared 0.995. No card of The Matter names Vespel or polyimide parts, so the slug is null." }, { "id": "og-graphite-r8500-curves-thesis", "slug": "carbon-family", "grade": null, "material_verbatim": "Graphite grade R 8500 from SGL Carbon, isostatically pressed", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "The thesis measured one as received graphite sample and one sample given a heat treatment at 1000 C for 2 hours in a vacuum furnace, both on the throughput system, four samples of 75 mm by 50 mm and 10 mm thick cut by electroerosion with the block immersed in water and then ultrasonically cleaned in an ethanol solvent, 100 cm2 of surface area each. The thesis states that the untreated sample raised the system pressure by an average factor of 140 at 30 C, that the heat treated sample initially showed 12 to 20 times lower pressures at 30 C, and that the results at 200 C for the untreated sample are omitted because the test had to be stopped for a power cut.", "motif": "The outgassing rates of both graphite samples are published as curves against time in figures 32 and 36 and are tabulated nowhere. Reading a number off a plotted curve is not reading a published value, so no value field is filled.", "_source": "S-CERN-THESIS-2019-061", "contradictions": [], "conditions": "Throughput system, 100 hours of pumping measured at each of 30, 60, 100, 150 and 200 C. The same holds for the PEEK sample of 103 cm2 and for the unbaked Vespel SP-1 sample of 48.5 cm2 measured on the same system, whose rates are published as curves only." }, { "id": "og-polymers-appendix-d-thesis", "slug": null, "grade": null, "material_verbatim": "Vespel SCP-5000 and Vespel SP-1 in the accumulation system", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "Appendix D of the thesis publishes estimated outgassing rates for two polymers. For Vespel SCP-5000, two samples of 5.8 cm diameter and 0.5 cm thickness, 120 cm2 total, baked 16 h at 120 C and 137 h at 250 C, the rates in units of 1e-10 hPa l/(s cm2) are less than 1 at 25 C, 2 at 50 C, 6 at 75 C, 20 at 100 C and 70 at 125 C. For Vespel SP-1, five samples of 50.8 mm diameter and 5 mm thickness, 242.6 cm2 total, baked 18 h at 210 C and 94 h at 250 C, the rates in units of 1e-11 hPa l/(s cm2) are 1 at 25 C, 10 at 100 C and 60 at 150 C.", "motif": "The thesis states at the head of the appendix that these tests encountered problems caused by a faulty variable leak valve and that a proper background measurement for the valve and sample chamber was left out when the new valve was fitted, and that a few things can still be inferred based on analog scans. A rate whose background was not measured is not a measured rate. The caption of table 20 also says the values were evaluated with the throughput method while the text of the same appendix says the samples were inserted in the accumulation system, and the corpus does not choose between two statements of the same document.", "_source": "S-CERN-THESIS-2019-061", "contradictions": [] }, { "id": "og-battes-literature-values-thesis", "slug": null, "grade": null, "material_verbatim": "Vespel SP-1, PEEK and Macor, literature values quoted by the thesis", "class": "declaration", "kind": "insufficient_data", "sign": "positive", "text": "Table 9 of the thesis reproduces nitrogen equivalent total outgassing rates measured by Battes and colleagues by the difference method on unbaked samples at three temperatures for 100 hours each, in hPa l/(s cm2). Vespel SP-1 of 0.79 mm gives 6.53e-7 at 20 C, 6.82e-8 at 100 C and 2.33e-9 at 200 C. Vespel SP-1 of 1.5 mm gives 5.61e-7, 7.56e-7 and less than 5.00e-9. PEEK of 1 mm gives 8.90e-8, 4.94e-10 and 1.16e-9. Macor of 3.9 mm gives 6.4e-10, 1.8e-9 and 1.1e-9. Table 21 adds two Vespel SP-1 values after a bakeout of 100 hours at 100 C then 100 hours at 200 C, in units of 1e-11 hPa l/(s cm2), 0.37 for 0.79 mm and 6.72 for 2.36 mm.", "motif": "These are not measurements of this source. They are values the thesis quotes from references 71 to 73, and the thesis states in the caption of table 9 that the Macor values were read from a digitalized plot. A value read off someone else digitizing a plot is two removes from the measurement. They are recorded here so that the merge lot knows they exist and can go to the original papers, and no value field is filled under this key.", "_source": "S-CERN-THESIS-2019-061", "contradictions": [] }, { "id": "og-gate-valve-h2-420c-furnace", "slug": null, "grade": null, "material_verbatim": "Commercial pneumatically actuated ultrahigh vacuum gate valve with 38 mm ports and DN40 flanges, stainless steel body, copper bonnet seals, Kalrez O-ring on the gate seal", "class": "rate", "species": "H2", "state": "baked", "treatment": "disassembled, degreased with ethanol, acetone and detergent, then vacuum baked at 420 C for 20 days in the furnace described by the source", "bake": { "temp_C": 420, "hours": 480, "atmosphere": "vacuum", "_source": "S-FEDCHAK-FURNACE-2018" }, "measurement": { "method": "accumulation", "temp_C": null, "pumping_time_h": "not-stated" }, "value": { "q_total_mbar_l_s": 1.2e-11, "_source": "S-FEDCHAK-FURNACE-2018" }, "conditions": "A TOTAL flow and not a rate per unit area. The source publishes 1.2e-9 Pa L per s with an estimated expanded uncertainty of 16 percent at a coverage factor of 2, and publishes no surface area for the valve, only an interior volume of 148 cm3 determined by filling the valve with water. Converted to mbar·L/s by the exact definition of the units, a shift of the exponent. The pneumatic mechanism and all components external to the vacuum side were removed before the bake and the O-ring was removed and replaced by a new one afterwards. The valve was stored for several weeks in atmosphere before the measurement and the new O-ring was included in it. The valve remained open and was never closed during the measurement. Rate of rise on a spinning rotor gauge, with the gauge and the right angle valve themselves baked between 400 C and 430 C for 12 days, the whole system baked at 125 C to 150 C for 5 days to remove water, and the background of the gauge and valve measured separately and subtracted. The source states it verified the outgassing products were mostly H2 by collecting for 24 hours with the valve closed and then recording the burst on the residual gas analyser. A gate valve is a component and not a material, so the slug is null.", "contradictions": [] }, { "id": "pr-degas-time-150c-furnace", "slug": "stainless-316ln", "grade": null, "material_verbatim": "304 stainless steel vacuum components", "class": "procedure", "procedure_kind": "bakeout", "bake": { "temp_C": 150, "hours": null, "atmosphere": "vacuum", "_source": "S-FEDCHAK-FURNACE-2018" }, "conditions": "Table I of the source, column at 150 C. Calculated times in DAYS to reduce the hydrogen concentration in 304 stainless steel by 99 percent, five characteristic diffusion times: 72 for a 1.6 mm plate, 290 for a 3.2 mm plate, 1700 for a DN 16 flange 0.76 cm thick, 4600 for a DN 40 flange 1.3 cm thick, 8500 for a DN 63 flange 1.7 cm thick, 11000 for a DN 100 flange 2 cm thick, 14000 for a DN 150 flange 2.24 cm thick, 17000 for a DN 200 flange 2.5 cm thick and 23000 for a DN 250 flange 2.84 cm thick. These are calculated from the diffusion coefficient with D0 1.22e-6 m2/s and an activation energy of 0.57 eV taken from Grant and colleagues, not measured, and they hold in the diffusion limited regime only. The source states that below a certain outgassing rate the process becomes recombination limited and the characteristic time is then longer than the formula predicts. The flange designations are those of ISO 3669. Similar degas times are stated for 316 stainless steel. The bake duration is left absent because the column publishes nine different durations, one per thickness, and picking one of them would be a choice the source does not make.", "_source": "S-FEDCHAK-FURNACE-2018", "contradictions": [] }, { "id": "pr-degas-time-375c-furnace", "slug": "stainless-316ln", "grade": null, "material_verbatim": "304 stainless steel vacuum components", "class": "procedure", "procedure_kind": "bakeout", "bake": { "temp_C": 375, "hours": null, "atmosphere": "vacuum", "_source": "S-FEDCHAK-FURNACE-2018" }, "conditions": "Table I of the source, column at 375 C. Calculated times in DAYS to reduce the hydrogen concentration in 304 stainless steel by 99 percent, five characteristic diffusion times: 0.30, 1.3, 7.4, 21, 38, 50, 64, 77 and 100 for the same nine components in the same order. These are calculated from the diffusion coefficient with D0 1.22e-6 m2/s and an activation energy of 0.57 eV taken from Grant and colleagues, not measured, and they hold in the diffusion limited regime only. The source states that below a certain outgassing rate the process becomes recombination limited and the characteristic time is then longer than the formula predicts. The flange designations are those of ISO 3669. Similar degas times are stated for 316 stainless steel. The bake duration is left absent because the column publishes nine different durations, one per thickness, and picking one of them would be a choice the source does not make.", "_source": "S-FEDCHAK-FURNACE-2018", "contradictions": [] }, { "id": "pr-degas-time-400c-furnace", "slug": "stainless-316ln", "grade": null, "material_verbatim": "304 stainless steel vacuum components", "class": "procedure", "procedure_kind": "bakeout", "bake": { "temp_C": 400, "hours": null, "atmosphere": "vacuum", "_source": "S-FEDCHAK-FURNACE-2018" }, "conditions": "Table I of the source, column at 400 C. Calculated times in DAYS to reduce the hydrogen concentration in 304 stainless steel by 99 percent, five characteristic diffusion times: 0.20, 0.90, 5.1, 14, 26, 34, 44, 53 and 71 for the same nine components in the same order. These are calculated from the diffusion coefficient with D0 1.22e-6 m2/s and an activation energy of 0.57 eV taken from Grant and colleagues, not measured, and they hold in the diffusion limited regime only. The source states that below a certain outgassing rate the process becomes recombination limited and the characteristic time is then longer than the formula predicts. The flange designations are those of ISO 3669. Similar degas times are stated for 316 stainless steel. The bake duration is left absent because the column publishes nine different durations, one per thickness, and picking one of them would be a choice the source does not make.", "_source": "S-FEDCHAK-FURNACE-2018", "contradictions": [] }, { "id": "pr-degas-time-425c-furnace", "slug": "stainless-316ln", "grade": null, "material_verbatim": "304 stainless steel vacuum components", "class": "procedure", "procedure_kind": "bakeout", "bake": { "temp_C": 425, "hours": null, "atmosphere": "vacuum", "_source": "S-FEDCHAK-FURNACE-2018" }, "conditions": "Table I of the source, column at 425 C. Calculated times in DAYS to reduce the hydrogen concentration in 304 stainless steel by 99 percent, five characteristic diffusion times: 0.20, 0.60, 3.6, 9.9, 18, 24, 31, 37 and 50 for the same nine components in the same order. These are calculated from the diffusion coefficient with D0 1.22e-6 m2/s and an activation energy of 0.57 eV taken from Grant and colleagues, not measured, and they hold in the diffusion limited regime only. The source states that below a certain outgassing rate the process becomes recombination limited and the characteristic time is then longer than the formula predicts. The flange designations are those of ISO 3669. Similar degas times are stated for 316 stainless steel. The bake duration is left absent because the column publishes nine different durations, one per thickness, and picking one of them would be a choice the source does not make.", "_source": "S-FEDCHAK-FURNACE-2018", "contradictions": [] } ], "site_conflicts": [ { "id": "sc-ss-baked", "subject": "austenitic stainless steel, baked, served on the site with three different numbers", "values": [ { "where": "src/data/matter-materials.ts, outgassing_baked of stainless-316ln, no source key, no species, no bake stated", "as_printed": { "value": "1e-08", "unit_printed": "Pa.m3.s-1.m-2", "unit": "pa_m3_s_m2" }, "q_mbar_l_s_cm2": 1e-11 }, { "where": "academy/mean-free-path.astro:1066 and academy/pressure-signatures.astro:342, published as 1e-12 Torr L/s/cm2, H2, baked SS, no bake stated", "as_printed": { "value": "1e-12", "unit_printed": "Torr L/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.33322e-12 }, { "_source": "S-CHIGGIATO-CAS-2017", "where": "this dataset, og-ss-h2-baked-150-cas, H2 after 150 C for 24 h", "as_printed": { "value": "3e-12", "unit_printed": "mbar ℓ s-1 cm-2", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 3e-12 } ], "retenue": null, "note": "The three numbers describe different or unstated bake conditions. None is declared wrong. Owner arbitration at the render lot, per the repository rule on technical exactitude.", "kind": "value" }, { "id": "sc-ss-vacfired", "subject": "austenitic stainless steel, vacuum fired, served on the site with two numbers and sourced here with three more", "values": [ { "q_mbar_l_s_cm2": 5e-13, "where": "src/data/matter-materials.ts, outgassing_vacuum_fired of stainless-316ln, no source key", "unit_not_printed_by_source": true }, { "q_mbar_l_s_cm2": 1e-13, "where": "src/content/stack/seals/03-materials-bakeout.md:12-13, vacuum firing about 950 C for about 24 h, pushes rates toward 1e-13 and below", "unit_not_printed_by_source": true }, { "_source": "S-FEDCHAK-2021", "where": "this dataset, 316L-XHV, firing 950 C at least 24 h", "as_printed": { "value": "5.1e-12", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 5.1e-14 }, { "_source": "S-FEDCHAK-2021", "where": "this dataset, 316LN-XHV", "as_printed": { "value": "9.9e-12", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 9.9e-14 }, { "_source": "S-CHIGGIATO-CAS-2017", "where": "this dataset, CERN firing 950 C for 2 h, walls up to a few mm", "as_printed": { "value": "1e-15", "unit_printed": "mbar ℓ s-1 cm-2", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 1e-15 } ], "retenue": null, "note": "Firing duration, wall thickness and furnace hydrogen pressure differ across these numbers and the sources say both duration and furnace pressure matter. Owner arbitration at the render lot.", "kind": "value" }, { "id": "sc-cu-grade", "subject": "copper grade named on the site against the grade measured by the source", "values": [ { "where": "src/content/stack/seals/03-materials-bakeout.md:14-15, CERN measures about 0.4 eV on OFE copper after bakeout at 200 C for 20 h" }, { "where": "S-CHIGGIATO-CAS-2017 Fig. 22, the same measurement is reported on an OFS copper chamber, oxygen-free silver-bearing, 7 m long, 8 cm diameter, 2 mm thick", "_source": "S-CHIGGIATO-CAS-2017" } ], "retenue": null, "note": "The site attributes to OFE a measurement the source attributes to OFS. Silver-bearing copper is a distinct grade, already documented on the site through the Sirius annotation. Owner arbitration at the render lot.", "kind": "attribution" }, { "id": "sc-def-no-pumping-time", "subject": "specific outgassing rates published without a pumping time, against the same quantity published with one", "values": [ { "_source": "S-LIGO-E960050-V13", "where": "Table 1 row H21, unbaked stainless steel 304 and 304L, water and total, no pumping time, no temperature", "as_printed": { "value": "1.8e-08", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 2.3998e-8 }, { "_source": "S-CHIGGIATO-CAS-2017", "where": "Table 3, unbaked austenitic stainless steel, water, at 10 h of pumping, room temperature", "as_printed": { "value": "3e-10", "unit_printed": "mbar·ℓ/s·cm²", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 3e-10 } ], "retenue": null, "note": "Not a disagreement about the material. The two numbers are nearly two orders of magnitude apart because one of them names the pumping time and the other does not. S-CHIGGIATO-CAS-2017 states in section 4 that without expressly mentioning the pumping time, any value of the water outgassing rate is meaningless, and that reducing the pressure by a factor of ten requires increasing the pumping time by the same factor. Twelve rows of the LIGO table are in this state. This is a contradiction of definition, the third species of the schema, and it is the reason every rate entry in this base carries a pumping time or declares that the source omitted it.", "kind": "definition" }, { "id": "sc-hc-threshold-unit", "subject": "the LIGO hydrocarbon acceptance threshold on AMU 41, 43, 53, 55 and 57, published in two different units by two documents of the same corpus", "values": [ { "published": "2e-12 torr-liters/cm2/s", "_source": "S-LIGO-E960022-V24", "where": "section 13.17.2.1, RGA acceptance criterion after the fluoroelastomer vacuum bake, written with an area in the denominator" }, { "published": "2e-12 torr-liter/sec", "_source": "S-LIGO-E080177-V2", "where": "section 6d, background floor of the hydrocarbon signature for a small oven load, written with no area" }, { "published": "4e-10 torr-liter/sec", "_source": "S-LIGO-E080177-V2", "where": "section 6c, acceptance criterion for a single suspension structure, written with no area" } ], "retenue": null, "note": "The same five masses, the same number 2e-12, and two different physical quantities. One document writes a specific rate per square centimetre, the other a total throughput. They cannot both be right, and neither is corrected by the other. E1000088 points to E080177-v1 while E960022-v24 predates E080177-v2, so a version history may explain it, but no read document says so. Published as is, with no arbitration. Any calculator that consumes this threshold must show which unit it is using and under which key.", "kind": "unit" }, { "id": "sc-tizrv-activation-temperature", "kind": "value", "subject": "the temperature at which a TiZrV getter coating is fully activated after 24 h of in situ heating", "values": [ { "published": "200 C for 24 h", "_source": "S-BENVENUTI-EPAC1998", "where": "this dataset, og-tizrv-activation-benv, from the EPAC 1998 paper already at the corpus" }, { "published": "180 C for 24 h", "_source": "S-BENVENUTI-TIZRV-2001", "where": "this dataset, og-tizrv-activation-180-benv2001, abstract, section 2 and caption of figure 1" } ], "retenue": null, "note": "Same laboratory, same coating, two temperatures three years apart. The 2001 document is not silent about the earlier figure. Section 2 states that the coating was found to display full activation after 24 h heating at 200 C in reference 3, and that to obtain a more precise value the interval between 150 and 200 C was explored, showing that the activation is indeed complete after 24 h heating at only 180 C. The corpus publishes both under their own keys and retains neither, because retaining one would be an arbitration nobody has made in this corpus. What the reader gains is the source own account of why the two differ. Second fact, found on the document and left untouched, the duration attributed to the 1998 result varies inside the 2001 article itself. The introduction credits reference 3 with full activation after 4 h heating at 200 C, and section 2 credits the same reference 3 with full activation after 24 h heating at 200 C. The refinement from 200 to 180 C is established by the document, the duration attached to the earlier result is not. Nothing is arbitrated here." }, { "id": "sc-elsey-t5-no-pumping-time", "kind": "definition", "subject": "vacuum baked metal rates published with a bake schedule but with no pumping time", "values": [ { "_source": "S-ELSEY-1975-II", "where": "table 5, 304 stainless steel electropolished, 30 h at 250 C, the column head carries no pumping time subscript", "as_printed": { "value": "3e-12", "unit_printed": "torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 3.99967e-12 }, { "_source": "S-CHIGGIATO-CAS-2017", "where": "the corpus, og-ss-h2-baked-200-cas, H2 after 200 C for 24 h, pumping time declared not applicable by the source", "as_printed": { "value": "2e-12", "unit_printed": "mbar ℓ s-1 cm-2", "unit": "mbar_l_s_cm2" }, "q_mbar_l_s_cm2": 2e-12 } ], "retenue": null, "note": "Tables 4, 6, 7 and 8 of the Elsey compilation name their pumping time in the column head, K1, K4 and K10. Table 5 names none. The seven vacuum baked rows therefore enter with pumping_time_h not-stated, and this conflict of definition is what the corpus requires before such a value may be served. It is the same defect as the one already published for the LIGO materials list." }, { "id": "sc-molybdenum-unbaked", "kind": "value", "subject": "the total outgassing rate of unbaked molybdenum", "values": [ { "_source": "S-LIGO-E960050-V13", "where": "the corpus, og-ligo-mo-unbaked, published 6.8e-07 torr l per s per cm2 with no pumping time and no measurement temperature, the table crediting reference 3, Holland, Steckelmacher and Yarwood, Vacuum Manual, 1974", "as_printed": { "value": "6.8e-07", "unit_printed": "torr-liter/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 9.06592e-7 }, { "_source": "S-ELSEY-1975-II", "where": "this dataset, table 4, molybdenum, published K1 52 x 1e-10 torr l per s per cm2 at 1 h of pumping, the table crediting reference 9, A Schram, Le Vide, No 103, 1963, 55", "as_printed": { "value": "52", "multiplier": "1e-10", "unit_printed": "torr l per s per cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 6.93276e-9 } ], "retenue": null, "note": "A factor of about 130 on the same material in the same state, from two different original workers. The gap is not explained by the pumping time. The Elsey value is read at 1 h, the earliest and therefore the highest of its two tabulated times, and it is still more than two orders of magnitude below the LIGO value, and its 10 h value is lower again by a further decade. Neither is retained. This is the first value conflict the corpus carries on a refractory metal." }, { "id": "sc-monolayer-surface-density", "kind": "value", "subject": "the number of molecules in one monolayer, the constant that turns a rate into monolayers per year", "values": [ { "published": "1e15 molecules/cm2", "_source": "S-ELSEY-1975-I", "where": "the corpus confirmation block cf-elsey-monolayer-constant, and the constant MONOLAYER_CM2 of src/lib/vacuum/formulas.ts, which the site uses to convert a rate into monolayers per year" }, { "published": "5e14 molecules/cm2", "_source": "S-NASA-CR-2101", "where": "the footnote on page 11 of the report, which defines one monolayer for the whole of table I" } ], "retenue": null, "note": "A factor of two on the constant that converts a rate into monolayers per year. The site publishes 1e15 and sources it to Elsey. This report defines one monolayer as 5e14 molecules/cm2 and uses that definition for every monolayer count in its table I, including the statement that less than a monolayer of gas is evolved from vitreous carbon during outgassing to 2000 K. Neither is declared wrong. A monolayer surface density depends on the molecule and on the packing assumed, and neither document states which molecule it packs. The consequence is direct: any monolayer count of NASA CR-2101 read with the constant of this site would be off by a factor of two." }, { "id": "sc-def-pressure-criterion-no-pumping-time", "kind": "definition", "subject": "rates published against a bake and a pressure criterion, against rates published against a stated time in vacuum", "values": [ { "_source": "S-SEFA-2017", "where": "table II, chamber VAC1 before heat treatment. The source states the chambers were baked at 150 C for 72 h and that measurements began once the pressure was below 1e-7 Pa, and states no elapsed pumping time", "as_printed": { "value": "1.8e-9", "unit_printed": "Pa l/s/cm2", "unit": "pa_l_s_cm2" }, "q_mbar_l_s_cm2": 1.8e-11 }, { "_source": "S-SEMENOV-IPAC2021", "where": "table 1, boron carbide at 100 C, published against a stated time in vacuum of 5 hours", "as_printed": { "value": "7.52e-12", "unit_printed": "Torr l/s/cm2", "unit": "torr_l_s_cm2" }, "q_mbar_l_s_cm2": 1.00258e-11 } ], "retenue": null, "note": "Of the six documents that entered with this block, four carry entries of class rate: S-CERN-THESIS-2019-061 with 26, S-SEFA-2017 with 14, S-SEMENOV-IPAC2021 with 16 and S-FEDCHAK-FURNACE-2018 with 1. Only S-SEMENOV-IPAC2021 publishes against a stated time in vacuum, on 15 of its 16 rows. The three others publish none, and S-BACHER-2003 and S-NASA-CR-2101 publish no rate at all. A rate without a pumping time is not comparable with one that has it, and every entry that inherits the omission carries pumping_time_h not-stated rather than a number nobody published. The two values put face to face here are not a disagreement about a material. They are two habits of publication, and this block is what allows the not-stated entries that depend on it to exist without hiding what they lack. It is a third subject, distinct from the two definition blocks already in this corpus: sc-def-no-pumping-time is the case where the source names no condition at all, sc-elsey-t5-no-pumping-time is the case where a bake schedule is published and the pumping time column head is absent, and here a pressure criterion stands in the place a pumping time would occupy." } ], "site_confirmations": [ { "id": "cf-iter-clean-has-no-unit", "subject": "three numbers published in the essay clean-has-no-unit, checked against the source they cite", "checks": [ { "site_says": "The ITER Vacuum Handbook sets its impurity limit for torus components at 1e-9 Pa.m3/s/m2 at 100 C", "source_says": "Table 5-1 gives 1e-9 Pa.m3.s-1.m-2 for impurities at an outgas temperature of 100 C for VQC 1, the torus primary vacuum", "verdict": "confirmed", "_source": "S-ITER-ITR-19-004" }, { "site_says": "a rate of 1e-12 mbar.L/s/cm2 is 0.8 monolayer per year, and the ITER impurity limit for torus components", "source_says": "1e-9 Pa.m3.s-1.m-2 converts to 1e-12 mbar.L/s/cm2 by the factor 1e-3 published in Table 1 of S-CHIGGIATO-CAS-2017", "verdict": "confirmed", "_source": "S-ITER-ITR-19-004" }, { "site_says": "ITER 2019 values, 200 ppm halogens, phosphorus and sulphur, and 5e6 particles larger than 0.5 micrometre per cubic metre", "source_says": "section 6.1.2 gives 200 ppm maximum for each of halogens, phosphorus and sulphur in VQC 1 and 3 cutting fluids, section 24.5 gives 5e6 particles larger than 0.5 micrometre per cubic metre for VQC 1 handling areas", "verdict": "confirmed", "_source": "S-ITER-ITR-19-004" } ], "note": "First cross-check of the base against a published essay of the site, and it passes on all three numbers. Recorded because a base that only publishes disagreements would misrepresent the state of the site." }, { "id": "cf-elsey-monolayer-constant", "subject": "the monolayer surface density this corpus uses to convert a rate into monolayers per year", "checks": [ { "site_says": "src/lib/outgassing/derive.ts declares MONOCOUCHE_CM2 as 1e15 molecules per cm2, described as a convention of the domain", "source_says": "part I of the source states that n sub m, the number of molecules in a monolayer, is about 1e15 molecules per cm2, and that nu zero has a value about 1e13 Hz", "verdict": "confirmed", "_source": "S-ELSEY-1975-I" } ], "note": "The constant carried since lot 01 was declared as a convention of the domain and was not sourced. It now has a primary source, and it is the constant on which the anchor of 1e-12 for one monolayer per year rests." }, { "id": "cf-lidylla-water-desorption-energy", "subject": "the activation energy the Academy modules use for chemisorbed water on stainless steel", "checks": [ { "site_says": "academy/why-we-bake.astro states Ea 0.9 to 1.05 eV for chemisorbed water and its charts use 0.9, and academy/surface-science.astro gives 0.8 to 1.2 eV for the bound layer", "source_says": "the calculated activation energy for thermal desorption of water on type 304 stainless steel is 1 eV or 20 kcal per mole, measured from the temperature dependence of the outgassing rate between 28 and 60 C", "verdict": "confirmed", "_source": "S-LI-DYLLA-1993" } ], "note": "The Academy carries this energy as a page local constant with no source key. The measurement is inside the published range on both modules. This is a confirmation of the site by a primary source, not a correction, and the render lot may use it to give those constants a key." }, { "id": "cf-ligo-pyrex-pumping-time", "subject": "the pyrex rate the LIGO materials list publishes without a pumping time", "checks": [ { "site_says": "the corpus entry og-ligo-pyrex-unbaked carries 1.6e-10 torr l per s per cm2 with pumping_time_h not-stated, the LIGO table crediting reference 2, Schram, Le Vide No 103, 1963", "source_says": "table 8 of the Elsey compilation gives pyrex 1 month in air a K10 of 1.6 x 1e-10 torr l per s per cm2, that is the same number at a pumping time of 10 h, and credits it to reference 9, A Schram, Le Vide, No 103, 1963, 55", "verdict": "confirmed", "_source": "S-ELSEY-1975-II" } ], "note": "The two tables draw on the same measurement by the same worker. The Elsey compilation names the pumping time and the surface history that the LIGO list omits, so the not-stated of that corpus entry can be resolved to 10 h and to a surface kept one month in air. This is a candidate resolution, not an integration, and the owner decides whether a corpus entry may take its condition from a second compilation of the same primary work. OWNER RULING, not applied. The two corpus entries keep pumping_time_h not-stated. The reasoning above is sound and it is not sufficient, and the corpus holds the counter example that says why. The LIGO stainless steel row credits the same primary worker as the Elsey table, Dayton at the 6th vacuum symposium, and the two compilations do NOT agree there, 1.8e-08 torr l per s per cm2 in the LIGO list against 2.1e-08 and 2.0e-08 in the Elsey table. Two compilations of one primary work diverge, that is measured, so a value that coincides in one row does not license borrowing a condition in another. This block stays published as a candidate resolution and nothing more." }, { "id": "cf-ligo-copper-pumping-time", "subject": "the copper rate the LIGO materials list publishes without a pumping time", "checks": [ { "site_says": "the corpus entry og-ligo-cu-unbaked carries 4.2e-09 torr l per s per cm2 with pumping_time_h not-stated, the LIGO table crediting reference 2, Schram, Le Vide No 103, 1963, p 55", "source_says": "table 4 of the Elsey compilation gives copper fresh a K10 of 41.5 x 1e-10 torr l per s per cm2, that is 4.15e-09 at a pumping time of 10 h, and credits it to reference 9, A Schram, Le Vide, No 103, 1963, 55", "verdict": "confirmed", "_source": "S-ELSEY-1975-II" } ], "note": "Same primary worker, same measurement, the LIGO list rounding to two figures. As for pyrex, the Elsey compilation supplies the pumping time of 10 h and the surface state that the LIGO list omits. Candidate resolution, owner arbitration. OWNER RULING, not applied. The two corpus entries keep pumping_time_h not-stated. The reasoning above is sound and it is not sufficient, and the corpus holds the counter example that says why. The LIGO stainless steel row credits the same primary worker as the Elsey table, Dayton at the 6th vacuum symposium, and the two compilations do NOT agree there, 1.8e-08 torr l per s per cm2 in the LIGO list against 2.1e-08 and 2.0e-08 in the Elsey table. Two compilations of one primary work diverge, that is measured, so a value that coincides in one row does not license borrowing a condition in another. This block stays published as a candidate resolution and nothing more." }, { "id": "cf-sefa-medium-temperature-bake", "subject": "the claim that a medium temperature bake under vacuum reaches the extreme high vacuum range on standard components", "checks": [ { "site_says": "the corpus carries vacuum firing at 950 C as the treatment that reaches the low 1e-13 and 1e-14 range, and carries no medium temperature treatment", "source_says": "a bake at 430 C for 360 h with the interior under vacuum brought a standard DN40CF 304L chamber to 1.9e-11 Pa l/s/cm2 of hydrogen, which is 1.9e-13 in the canonical unit, without any furnace above 950 C", "verdict": "confirmed", "_source": "S-SEFA-2017" }, { "site_says": "the corpus carries no statement on air baking against vacuum baking at the same temperature", "source_says": "identical components baked in air at the same temperature for the same time did not reach the same flux, the hydrogen flux staying about one order of magnitude higher than the medium temperature vacuum bake", "verdict": "confirmed", "_source": "S-SEFA-2017" }, { "site_says": "the corpus carries no statement on the effect of an air bake applied after a vacuum bake", "source_says": "a 24 h air bake at 430 C applied after the medium temperature vacuum bake lowered the outgassing rate by nearly a factor of two, which the source states suggests the air bake created an oxide layer that reduced the hydrogen recombination rate on the surface", "verdict": "confirmed", "_source": "S-SEFA-2017" } ], "note": "Three findings of one source, recorded as confirmations because they add to the corpus rather than contradict it. The third one and the conclusion of S-BACHER-2003 point in opposite directions on the same physics, since Bacher states that baking in air would not be a wise choice for particle accelerator vacuum chambers because the radiation induced outgassing originates in the oxide layer that the air bake grows. The two are not in numerical contradiction, they weigh the same oxide layer against two different uses, and both statements are in this base." } ], "derived": { "methode": "Derived at build from src/data/outgassing.json. A curve is read by LINEAR INTERPOLATION IN LOG-LOG between consecutive points, which is a power law, the form the sources publish. It is never extrapolated outside the pumping time range of the curve, and never interpolated across a junction where two sources disagree. A reading is served under the key of the troncon that covers its pumping time, never under a global key. The four magnitude fields are distinct and never compared with one another: one is a rate per unit area, the three others are not.", "unite": { "canonical": "mbar·L/s/cm²", "champ": "q_mbar_l_s_cm2", "nonSurfaciques": [ "q_total_mbar_l_s", "q_per_length_mbar_l_s_m", "q_per_volume_mbar_l_s_cm3" ] }, "conversions": { "temperature_K": 293.15, "moleculesParMbarLitre": 24707400000000000000, "monocouchesParAnPour1e12": 0.779706, "note": "n = PV / kT with 1 mbar.L = 0.1 Pa.m3, and one monolayer taken as 1e15 molecules per cm2. Both numbers are computed, never typed: the essay clean-has-no-unit publishes 2.5e19 molecules per mbar litre and 0.8 monolayer per year at 1e-12, and the gate checks that this module reproduces them." }, "compteurs": { "nEntrees": 258, "parClasse": { "rate": 194, "declaration": 33, "procedure": 18, "requirement": 13 }, "parEspece": { "H2O": 10, "H2": 32, "N2": 8, "CO2": 4, "Kr": 1, "total": 132, "HC": 4, "impurities": 6, "hydrogen isotopes": 1, "CO": 4, "CH4": 3 }, "parEtat": { "unbaked": 110, "baked": 77, "vacuum_fired": 3, "activated": 1, "not-stated": 3 }, "nValeursSourcees": 319, "nClesDeclarees": 18, "nClesCitees": 18, "nSlugRattache": 159, "nSlugNul": 99, "nMateriauxMatter": 25, "nCourbes": 85, "nEntreesAvecLoi": 8, "nBlocsLoi": 16, "nDiffusion": 6, "nConflitsSite": 10, "nConfirmationsSite": 10, "nContradictionsEntree": 3, "decades": 13.6, "borneBasse": 1e-18, "borneHaute": 0.0000399967 }, "echelle": { "bas": 1e-18, "haut": 0.0000399967, "decades": 13.602, "basPar": "og-tizrv-kr-activated-cas", "hautPar": "og-elsey-t7-67-neoprene", "unite": "mbar·L/s/cm²", "note": "Bounds of the surface rates actually served, recomputed at every build. Law coefficients are excluded: they live in the unit of their own source and a fit coefficient is not a rate." }, "champSurfacique": "q_mbar_l_s_cm2" } } }