Cooling device for a low temperature magnet system

Details Cooling device for a low temperature magnet system Cooling device for a low temperature magnet system

1984-02-07

1985-08-20

King, Lloyd L.

Refrigeration

Using electrical or magnetic effect

Thermoelectric; e.g., peltier effect

62467, 62514R, F25B 2102

Patent

active

045355959

ABSTRACT:
A cooling apparatus for a low temperature magnet system includes a superconducting magnet coil (32) which encircles a test space (36). The magnet coil (32) is surrounded by at least one intermediate shield (26, 29) and is contained in an evacuated outer shell (22). On the outer shell (22) is a motor driven refrigerator (11) which actively cools the at least one intermediate shield (26, 29) by means of a cooling arm (18) extending through the outer shell (22). For compensating the disturbing fields emitted by the motorized drive of the refrigerator (11) a sensing device is provided for picking up these magnetic and/or mechanical disturbing signals. The sensor signal controls at least one coil (62) for compensating the disturbing field effective in the test space (36).

REFERENCES:
patent: 2704431 (1955-03-01), Steele
patent: 3364687 (1968-01-01), Kolm
patent: 3424230 (1969-01-01), Wright, Jr.
patent: 3588312 (1971-06-01), Burnier
patent: 3589138 (1971-06-01), Severijns et al.
patent: 3638440 (1972-02-01), Lawless
patent: 3650117 (1972-03-01), Robinson et al.
patent: 3788088 (1974-01-01), Dehne
"A Portable 16.5 T Superconductive Magnet System for Shared Use", Hudson & Jones, Cryogenics, (Oct. 1976), p. 593.
"A Pumped Supercritical Helium Flow Loop for Heat Transfer Studies", Cairns & Brassington, Cryogenics, (Aug. 1976), p. 465.
"Nuclear Refrigeration of Liquid He.sup.3 ", Ahonen et al., Cryogenics, (Sep. 1976), p. 521.

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