โ Scribed by A.E. Salomonovich; T.M. Sidyakina; A.S. Khaikin; V.N. Bakun; A.A. Nikonov; V.A. Maslakov; E.I. Klimenko; V.N. Kurkin
No coin nor oath required. For personal study only.
The description, main characteristics and flight tests results of the closed-cycles three-cascade helium refrigerator operating to 4.4 K are presented. The refrigerator is intended for the cooling far-infrared (submillimeter) detectors of the telescope BST-IM on board of the orbital station "Salyut-6" The cryogenic system which uses two high efficient gas cooling machines operating under Sterling cycle for the preliminary cooling at levels 80 K and 20 K and Joule-Thomson cooling effect to obtain the temperature 4.4 K, is compact and simple to operate in automatic regime. The first space helium refrigerator described provides the useful refrigeration of 0.5 W with power requirements of less than 1.5 kW. According to the data obtained during more than two years flight tests on board of "Salyut-6", all the refrigerator's systems operate within the limits of standards and provide the reliable cooling of the telescope's detectors.
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attracted an exceptional attendance with over 300 contributed papers indicating a growing interest in cryogenic applications and materials. CEC Chairman, Dr T. Flynn opened the meeting with a dedication to Dr K. Timmerhaus for his 25 years of continuous and unrelenting service as editor of Advances