Development of a Space-Flight ADR Providing Continuous Cooling at 50 mK with Heat Rejection at 10 K

Tuttle, Jim ; Jahromi, Amir ; Canavan, Ed ; DeLee, Hudson ; DiPirro, Michael ; Kimball, Mark ; Shirron, Peter

关键词: ADIABATIC DEMAGNETIZATION COOLING;    COOLING SYSTEMS;    CRYOGENIC COOLING;    SUPERCONDUCTING MAGNETS;    THERMODYNAMIC EFFICIENCY;    OPTICAL EQUIPMENT;    FLIGHT CHARACTERISTICS;    PERFORMANCE TESTS;   

RP-ID  :  GSFC-E-DAA-TN70417

学科分类：工程和技术（综合）

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

Future astronomical instruments will require sub-Kelvin detector temperatures to obtain high sensitivity. In many cases large arrays of detectors will be used, and the associated cooling systems will need performance surpassing the limits of present technologies. NASA is developing a compact cooling system that will lift heat continuously at temperatures below 50 mK and reject it at over 10 K. Based on Adiabatic Demagnetization Refrigerators (ADRs), it will have high thermodynamic efficiency and vibration-free operation with no moving parts. It will provide more than 10 times the current flight ADR cooling power at 50 mK and will also continuously cool a 4 K stage for instruments and optics. In addition, it will include an advanced magnetic shield resulting in external field variations below 5 µT. We describe the cooling system here and report on the progress in its development.