Spacecraft borne long life cryogenic refrigeration status and trends

Abstract The status of cryogenic refrigerator development intended for, or possibly applicable to, long life spacecraft borne application is reviewed. Based on these efforts, the general development trends are identified. Using currently projected technology needs, the various trends are compared and evaluated. The linear drive, non-contacting bearing Stirling cycle refrigerator concept appears to be the best current approach that will meet the technology projection requirements for spacecraft borne cryogenic refrigerators. However, a multiple redundant set of lightweight, moderate life, moderate reliability Stirling cycle cryogenic refrigerators using high-speed linear drive and sliding contact bearings may possibly suffice.