Doublet III neutral beam cryopumping system

Journal Article · Wed Apr 01 04:00:00 EST 1981 · J. Vac. Sci. Technol.; (United States)

DOI:https://doi.org/10.1116/1.570856· OSTI ID:6403035

Otavka, M A; Colleraine, A P; Holland, M M; Kim, J

Two neutral beamlines, each capable of injectingroughly-equal 3.6 MW H/sup 0/ beam of 80 keV, are employed for the upcoming neutral beam injection heating experiments in Doublet III tokamak. The large influx of hydrogen gas in a beamline is pumped by a sophisticated system of cryopanels that are cooled by a closed-loop forced flow of liquid helium. Two cryopanels per beamline at sub-cooled liquid helium temperatures provide a combined pumping speed of over 10/sup 6/ l/s. The system of cryopanels, transfer lines, and a liquifier is described, together with preliminary test results in the actual beamline.

• Research Organization: General Atomic Company, San Diego, California 92121
• OSTI ID: 6403035
• Journal Information: J. Vac. Sci. Technol.; (United States), Journal Name: J. Vac. Sci. Technol.; (United States) Vol. 18:3; ISSN JVSTA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
BEAM INJECTION
BEAMS
CLOSED PLASMA DEVICES
CRYOPUMPS
ELEMENTS
EQUIPMENT
FLUIDS
GASES
HELIUM
HIGH VACUUM
HYDROGEN
LABORATORY EQUIPMENT
LIQUIDS
NEUTRAL ATOM BEAM INJECTION
NONMETALS
PUMPS
RARE GASES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
ULTRALOW TEMPERATURE
VACUUM PUMPS