Refrigeration – Storage of solidified or liquified gas – Including cryostat
Patent
1990-05-15
1993-02-23
Capossela, Ronald C.
Refrigeration
Storage of solidified or liquified gas
Including cryostat
4151821, 4151995, 4152141, 417352, F25B 1900
Patent
active
051879387
ABSTRACT:
In a method and a device for precooling the helium tank of a cryostat, in particular one for accommodating a superconductive magnet coil, contamination of the helium tank is avoided by the fact that helium gas is cooled down to the temperature of boiling nitrogen in a closed circuit, the helium gas is then circulated through the helium tank and thereafter cooled down again to the temperature of boiling nitrogen. The helium tank is cooled by means of the helium gas, which has a temperature of 77 K, until the tank has reached that temperature. The interior of the helium tank getting into contact exclusively with helium, the helium tank can be filled with liquid helium immediately after it has reached the precooling temperature, without the need to clean the tank first.
REFERENCES:
patent: 2956732 (1960-10-01), Stalker
patent: 2985356 (1961-05-01), Beecher
patent: 3303660 (1967-02-01), Berg
patent: 3850004 (1974-11-01), Vander Arend
patent: 4187689 (1980-02-01), Selcukoglu et al.
patent: 4510771 (1985-04-01), Matsuda et al.
IEEE Transactions on Magnetics, vol. 24, No. 2, Mar. 1988, pp. 1230-1232.
Jahnke et al.: First Superconducting Prototype Magnets for a Compact Synchroton Radiation Source in Operation.
Marek Daniel
Mraz Beat
Notzli Christoph
Ungricht Ernst
Capossela Ronald C.
Hackler Walter A.
Spectrospin AG
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