Refrigeration of superconducting magnet systems

Details Refrigeration of superconducting magnet systems Refrigeration of superconducting magnet systems

1994-01-14

1996-03-05

Capossela, Ronald C.

Refrigeration

Storage of solidified or liquified gas

With conservation of cryogen by reduction of vapor to liquid...

62 511, F17C 502

Patent

active

054957184

ABSTRACT:
A refrigeration system includes a dewar and a refrigerator/liquefier which meets the variable demands of a superconducting magnet within the dewar. The system is sized to meet average loads over a defined duty cycle, and is variably operable to meed demands. In the preferred embodiment, a first supply of fluid circulates through a "condenser" element positioned in a dewar ullage to liquefy a separate supply of fluid in the dewar, and to refrigerate a pulsed cryogenic load therein, such as a superconducting magnet. A portion of the first supply of fluid may be diverted to refrigerate a second pulsed cryogenic load, such as magnet current leads permanently connected to the magnet. The dewar includes a cold gas vapor storage chamber separate from the dewar ullage, and the chamber is preferably located within the inner core of a solenoid superconducting magnet for compact and thermally efficient design. Responsive, independent adjustment of refrigeration to pulsed cryogenic loads is made possible.

REFERENCES:
patent: 4543794 (1985-10-01), Matsutani et al.
patent: 4766741 (1988-08-01), Bartlett et al.
patent: 4790147 (1988-12-01), Kuriyama et al.
patent: 4796433 (1989-01-01), Bartlett
patent: 5150578 (1992-09-01), Oota et al.

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