Cooling system having a plurality of cooling stages in which ref

Details Cooling system having a plurality of cooling stages in which ref Cooling system having a plurality of cooling stages in which ref

1996-05-15

1998-01-27

Kilner, Christopher

Refrigeration

Gas compression, heat regeneration and expansion, e.g.,...

62467, F25B 900

Patent

active

057111570

ABSTRACT:
A superconducting magnet apparatus comprises a superconducting coil unit, and a refrigerant-filled chamber type refrigerator having a plurality of cooling stages. At least a final cooling stage of the cooling stages includes a static-type refrigerant-filled chamber and is associated with the superconducting coil unit, and at least a first cooling stage of the cooling stages includes a movable-type refrigerant-filled chamber.

REFERENCES:
patent: 3902328 (1975-09-01), Claudet
patent: 5181383 (1993-01-01), Goto et al.
patent: 5295355 (1994-03-01), Zhou et al.
patent: 5335505 (1994-08-01), Ohtani et al.
patent: 5387252 (1995-02-01), Nagao
patent: 5412952 (1995-05-01), Ohtani et al.
patent: 5440883 (1995-08-01), Harada
J. L. Gao, et al., "A Hybrid Two-Stage Refrigerator Operated at Temperatures Below 4 K", Cryogenic Engineering Conference (Columbus, Ohio USA), Jul. 17-21, 1995.

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