Doublet III neutral beam injector test tank cryopanel design

Conference · Sat Mar 01 04:00:00 EST 1980

OSTI ID:5435854

Doll, D. W.; Kamperschroer, J. H.; Arend, P. V.

A simple condensing cryopanel has been designed for the Doublet III neutral beam test tank with a 320,000 liters per second pumping capacity for hydrogen. This maintains a vacuum in the test tank which simulates the Doublet III vessel, 1.3 x 10/sup -3/ Pa (approx.10/sup -5/ torr). The hydrogen gas load comes from the beam striking the test tank calorimeter and amounts to about 7.2 torr liters per second. The cryopanel is cylindrical shaped with a liquid helium (LHe) surface that pumps through liquid nitrogen (LN) cooled aluminum chevrons located in squirrel-cage fashion around the inside surface of the cylinder. The LHe cooled surface is a smooth cylinder 2.09m in diameter by .69m long with LHe flowing in a approx. 1mm annular space between concentric cylinders. The chevrons which are not blackened are cooled from each end with LN flowing in ring manifolds that serve as the primary cryopanel structure. The LHe is force fed at 55.2 kPa remaining in the liquid phase through the panel. External heat exchanger capability permits use of helium at 3.8 to 4.2/sup 0/K. Normal operating flow rate is 1.4 g/sec for a heat load expected to be 12.2 W total.

• Research Organization: Cryogenic Consultants, Inc., Allentown, PA (USA); General Atomic Co., San Diego, CA (USA)
• DOE Contract Number: AT03-76ET51016
• OSTI ID: 5435854
• Report Number(s): GA-A-15652; CONF-791102-154
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700205* -- Fusion Power Plant Technology-- Fuel
Heating
& Injection Systems
CALORIMETERS
CRYOPUMPS
DOUBLET REACTORS
LABORATORY EQUIPMENT
MEASURING INSTRUMENTS
NEUTRAL BEAM SOURCES
PUMPS
SPECIFICATIONS
TEST FACILITIES
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
VACUUM PUMPS