Space-borne He-3 refrigerator

Details Space-borne He-3 refrigerator Space-borne He-3 refrigerator

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990cryo...30..263d&link_type=abstract

(NASA, Space Cryogenic Workshop, 8th, Pasadena, CA, July 31, Aug. 1, 1989) Cryogenics (ISSN 0011-2275), vol. 30, March 1990, p.

Other

7

Cryogenic Cooling, Helium Isotopes, Infrared Telescopes, Liquid Helium, Refrigerators, Spaceborne Telescopes, Bolometers, Cryostats, Reduced Gravity, Rocket-Borne Instruments

Scientific paper

A space-compatible He-3 refrigerator is being developed for cooling the bolometric detectors of the Far Infrared Photometer (FIRP) in the Infrared Telescope in Space (IRTS). The refrigerator is self-contained and compact, and can be recycled in zero gravity with low power dissipation (20 mW or less). A laboratory prototype that contains 2 STP cu dm of He-3 has been successfully cycled upside-down, i.e., against gravity, thus proving the feasibility of the cycle in zero gravity. Sintered copper confines the He-3 to the evaporator during the low temperature phase. Temperatures as low as 280 mK have been achieved with this configuration. Other types of porous material which have lower mass density are currently under investigation.

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