摘要: The High Efficiency Cryocooler (HEC) is a highly reliable, >10 year life, space cryocooler. Design goals included very high capacity with low mass. HEC achieved its 10 W at 95 K load while rejecting to 300 considerable margin and flight configured mass of 4 Kg. This cooler design being fabricated for number payloads. paper describes the cooler, measured performance, qualification.