Properties of a two stage adiabatic demagnetization refrigerator

Cryogenic Engineering Conference 2015

材料科学;物理学

Fukuda, H.^1,2 ; Ueda, S.^1,2 ; Arai, R.^1,2 ; Li, J.^2 ; Saito, A.T.^2 ; Nakagome, H.^2 ; Numazawa, T.^1

Environment and Energy Materials Division, National Institute for Materials Science, Tsukuba, Ibaraki

305-0003, Japan^1

Department of Urban Environment System, Chiba University, Chiba

263-8522, Japan^2

关键词: Adiabatic demagnetization refrigerators;    Continuous temperature;    Cryogenic temperatures;    High resolution sensors;    Space missions;    Transition-edge sensors;    Ultra low temperatures;    Very low temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/101/1/012047/pdf
DOI  :  10.1088/1757-899X/101/1/012047

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Currently, many space missions using cryogenic temperatures are being planned. In particular, high resolution sensors such as Transition Edge Sensors need very low temperatures, below 100 mK. It is well known that the adiabatic demagnetization refrigerator (ADR) is one of most useful tools for producing ultra-low temperatures in space because it is gravity independent. We studied a continuous ADR system consisting of 4 stages and demonstrated it could provide continuous temperatures around 100 mK. However, there was some heat leakage from the power leads which resulted in reduced cooling power. Our efforts to upgrade our ADR system are presented. We show the effect of using the HTS power leads and discuss a cascaded Carnot cycle consisting of 2 ADR units.