2$sup 0$K vacuum pumping system for Baseball II

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A vacuum pumping system that provides a cryo surface for condensing and freezing of H/sub 2/ gas is described. A closed-loop vacuum system was designed and built at Lawrence Livermore Laboratory to pump down the neutralizer LH/sub e/ dewar with a volurae of 350 l and the lambda point dewar with a LH/sub e/ volume of 250 l. Both of these dewars can be pumped down simultaneously or one at a time. 100% of the H/sub e/ gas is recovered free of contaminations. The vacuum pump can handle 340 SCFM of gas. The LH/sub e/ dewars are pumped down below ... continued below

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7 pages

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Denhoy, B.S. August 20, 1973.

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  • Lawrence Livermore Laboratory
    Publisher Info: California Univ., Livermore (USA). Lawrence Livermore Lab.
    Place of Publication: Livermore, California

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Description

A vacuum pumping system that provides a cryo surface for condensing and freezing of H/sub 2/ gas is described. A closed-loop vacuum system was designed and built at Lawrence Livermore Laboratory to pump down the neutralizer LH/sub e/ dewar with a volurae of 350 l and the lambda point dewar with a LH/sub e/ volume of 250 l. Both of these dewars can be pumped down simultaneously or one at a time. 100% of the H/sub e/ gas is recovered free of contaminations. The vacuum pump can handle 340 SCFM of gas. The LH/sub e/ dewars are pumped down below the lambda point. This condition reduces the LH/sub e/ container wall temperature to 2.1 deg K giving a base pressure of 10/sup -13/ torr for H/sub 2/ gas/sup 2/. To attain a stable condition the LH /sub e/ baths are puuped down to 33 torr or lower to give a surface temperatare of about 2/sup 0/K/sup 3/. The Baseball II helium factlity is a close loop system. The H/sub e/ gas is recovered from all the LH/sub e/ usage point. This gas is accumulated in one of the two 8000 cu ft inflatable gas bags. The gas from the gas bags is compressed into storage tanks at 1800 psig. The gas is purified to 99.99999% and it is liquified at a rate of 100 liquid liters per hour. (auth)

Physical Description

7 pages

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Dep. NTIS

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  • 5. symposium on engineering problems of fusion research, Princeton, New Jersey, USA, 6 Nov 1973

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  • Report No.: UCRL--74942
  • Report No.: CONF-731114--31
  • Office of Scientific & Technical Information Report Number: 4366009
  • Archival Resource Key: ark:/67531/metadc1023418

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • August 20, 1973

Added to The UNT Digital Library

  • Oct. 15, 2017, 10:09 p.m.

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  • June 4, 2019, 4:04 p.m.

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Denhoy, B.S. 2$sup 0$K vacuum pumping system for Baseball II, article, August 20, 1973; Livermore, California. (https://digital.library.unt.edu/ark:/67531/metadc1023418/: accessed August 20, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.