✦ LIBER ✦

4He refrigerator for space

✍ Scribed by J.J. Bock; L. Duband; M. Kawada; H. Matsuhara; T. Matsumoto; A.E. Lange

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 581 KB
Volume: 34
Category: Article
ISSN: 0011-2275
DOI: 10.1016/0011-2275(94)90140-6

No coin nor oath required. For personal study only.

✦ Synopsis

A compact, self-contained 4He refrigerator suitable for use in space has been developed. The refrigerator is recyclable, has no moving parts, and requires only electrical connections for heaters and thermometers to operate from a T~< 4.2 K cold stage. It consists of a sorption pump filled with charcoal and an evaporator filled with lightweight silicose sponge to contain the liquid 4He in zero-gravity. Gas-gap heat switches attached to the pump and to the evaporator allow the refrigerator to be cycled in any orientation and to be operated in zero-gravity. The refrigerator has an operating temperature of 1.10K and a cooling capacity of 6.5J when operated from a 4.2 K cold stage, and an operating temperature of 0.96K and a cooling capacity of 13J when operated from a 2 K cold stage. The refrigerator has been vibration tested and has been successfully used in a sounding rocket experiment.

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