Cryogenic magnet systems

Details Cryogenic magnet systems Cryogenic magnet systems

1985-12-24

1987-07-21

Capossela, Ronald C.

Refrigeration

Storage of solidified or liquified gas

62119, 62514R, F25B 1900

Patent

active

046809368

ABSTRACT:
According to the present invention, improved cryogenic magnet systems for use in MRI devices are provided. These systems comprise an electromagnet immersed in a first tank containing a first liquefied gas. The first tank is located in an evacuated container that is evacuated to a high vacuum. A refrigerating system external to said evacuated container includes a second gas and a means for liquefying said second gas. A heat radiation shield means surrounding said first tank is cooled by the liquified second gas. Features of the invention include a thermal siphon for cooling the heat radiation shield and neon as the second gas.

REFERENCES:
patent: 3129334 (1964-04-01), Loflin et al.
patent: 3860494 (1975-01-01), Hickman
patent: 3894403 (1975-07-01), Longsworth
patent: 3930375 (1976-01-01), Hofmann
patent: 4057963 (1977-11-01), Basiulis
patent: 4223540 (1980-09-01), Longsworth
patent: 4277949 (1981-07-01), Longsworth
patent: 4386309 (1983-05-01), Peschka
patent: 4537033 (1985-08-01), Kamil

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