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Development of a space-flight ADR providing continuous cooling at 50 mK with heat rejection at 10 K
[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.
[发布日期]  [发布机构] NASA Goddard Space Flight Center, CODE 552 :CNY, Greenbelt; MD; 20771, United States^1;NASA Goddard Space Flight Center, CODE 665 :CNY, Greenbelt; MD; 20771, United States^2
[效力级别] 物理学 [学科分类] 材料科学(综合)
[关键词] Adiabatic demagnetization refrigerators;Astronomical instrument;Continuous cooling;External fields;Heat rejection;High sensitivity;Thermodynamic efficiency;Vibration-free [时效性] 
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