Development of a space-flight ADR providing continuous cooling at 50 mK with heat rejection at 10 K

Cryogenic Engineering Conference 2017

材料科学;物理学

Tuttle, James^1 ; Canavan, Edgar^1 ; Delee, Hudson^1 ; DiPirro, Michael^1 ; Jahromi, Amir^1 ; James, Bryan^1 ; Kimball, Mark^1 ; Shirron, Peter^1 ; Sullivan, Dan^1 ; Switzer, Eric^2

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

关键词: Adiabatic demagnetization refrigerators;    Astronomical instrument;    Continuous cooling;    External fields;    Heat rejection;    High sensitivity;    Thermodynamic efficiency;    Vibration-free;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/278/1/012009/pdf
DOI  :  10.1088/1757-899X/278/1/012009

学科分类：材料科学（综合）

来源: IOP

【 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.