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U.S. Department of Energy
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GETTERING HYDROGEN AT ULTRA-LOW PRESSURES BY EVAPORATED METAL COATINGS

Technical Report ·
OSTI ID:4274487

Results for pumping neutral hydrogen gas in 1-sec pulses by the gettering action of an evaporated coating of molybdenum are presented. One-sec gas in-puts are observed at equivalent purnping speeds > 10/sup 4/ liters/sec at 1 x lO/sup -8/ mm Hg in a 70-liter volume system. Base pressures < 1 x 10/sup - 10/ mm Hg are achieved by gettering with the static evaporated coating and pumping with a 4-in. oil diffusion pump simultaneously. Criteria for choice of gettering metal and a brief outline of pumpin- g requirements for controlled fusion devices called pyrotrons are included. (auth)

Research Organization:
California. Univ., Livermore. Lawrence Radiation Lab.
DOE Contract Number:
W-7405-ENG-48
NSA Number:
NSA-13-007874
OSTI ID:
4274487
Report Number(s):
UCRL-5258
Country of Publication:
United States
Language:
English