Design of the advanced divertor pump cryogenic system for DIII-D

Conference · Fri Nov 01 04:00:00 EST 1991

OSTI ID:5994691

Schaubel, K M; Baxi, C B; Campbell, G L; Gootgeld, A M; Langhorn, A R; Laughon, G J; Smith, J P; Anderson, P M ^[1]; Menon, M M ^[2]

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1. General Atomics, San Diego, CA (United States)
2. Oak Ridge National Lab., TN (United States)

The design of the cryogenic system for the D3-D advanced divertor cryocondensation pump is presented. The advanced divertor incorporates a baffle chamber and bias ring located near the bottom of the D3-D vacuum vessel. A 50,000 l/s cryocondensation pump will be installed underneath the baffle for plasma particle exhaust. The pump consists of a liquid helium cooled tube operating at 4.3{degrees}K and a liquid nitrogen cooled radiation shield. Liquid helium is fed by forced flow through the cryopump. Compressed helium gas flowing through the high pressure side of a heat exchanger is regeneratively cooled by the two-phase helium leaving the pump. The cooled high pressure gaseous helium is than liquefied by a Joule-Thomson expansion valve. The liquid is returned to a storage dewar. The liquid nitrogen for the radiation shield is supplied by forced flow from a bulk storage system. Control of the cryogenic system is accomplished by a programmable logic controller.

• Research Organization: General Atomics, San Diego, CA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-89ER51114
• OSTI ID: 5994691
• Report Number(s): GA-A-20607; CONF-910968--53; ON: DE92004288
• Country of Publication: United States
• Language: English

Related Subjects

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CRYOPUMPS
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