Low cost intermediate radiation shield for a magnet cryostat

Details Low cost intermediate radiation shield for a magnet cryostat Low cost intermediate radiation shield for a magnet cryostat

1986-01-03

1987-09-22

Tanner, Harry

Refrigeration

Refrigeration producer

Evaporator, e.g., heat exchanger

220423, F25B 1900

Patent

active

046946632

ABSTRACT:
A radiation shield assembly is provided for a cryostat having a helium vessel and which includes a penetration for cooling the helium vessel. The radiation shield assembly comprises a shield having means for conducting heat toward the cryostat penetration, means for providing an isothermal surface and means for reflecting radiation. The shield surrounds the helium vessel, and is spaced away from the helium vessel by spacer means comprising isolated packets of powder insulation in permeable packages.

REFERENCES:
patent: 3416693 (1968-12-01), Covington et al.
patent: 3487971 (1970-01-01), Kirgis et al.
patent: 4055268 (1977-10-01), Barthel
patent: 4159359 (1979-06-01), Pelloux-Gervais et al.
patent: 4492090 (1985-01-01), Laskaris
patent: 4502296 (1985-03-01), Ogata et al.
Glaser, "Effective Thermal Insulation:Multi-Layer Systems", Cryogenic Engineering News, Apr. 1969, pp. 16-24.
C. L. Tein et al., "Glass Microsphere Cryogenic Insulation", Cryogenics, Oct. 1976, pp. 583-586.
I. A. Black and P. E. Glaser, Arthur D. Little, Inc., Cambridge, Mass., "Effects of Compressive Leads on the Heat Flux Through Multilayer Insulations", Paper on Work Supported by NASA, Lewis Research Center under Contracts NAS5-664, NASw-615, NAS3-4181, and NAS3-6283.

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