Development of Active Gas-Gap Heat Switch for Double-Stage Adiabatic Demagnetization Refrigerators
Development of Active Gas-Gap Heat Switch for Double-Stage Adiabatic Demagnetization Refrigerators
复制标题
双级绝热退磁制冷机主动气隙热开关的研制
DOI：
10.1007/s10909-012-0594-7
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发表时间：
2012
影响因子：
2
通讯作者：
T.Oshima
中科院分区：
文献类型：
--
作者：
Y.Ishisaki;K.Henmi;H.Akamatsu;T.Enoki;T.Ohashi;A.Hoshino;K.Shinozaki;H.Matsuo;N.Okada;T.Oshima
设计并制作了一种主动式气隙热开关（AGGHS），用于开关双级绝热退磁制冷机（DADR）第一级（0.05 ~ 2K）和第二级（1- 4K）之间的热传导。我们的设计在几何上分离了两个主导ON或OFF性能的组件，并在2 K下实现了6 mW/K（ON）或4 μW/K（OFF）的热导率。ON/OFF由附在炭盒上的加热器控制，以吸附/释放内部的4 He气体。我们将AGGHS引入DADR，并成功地将探测器级冷却到60 mK，正常工作了一年多。
We designed and fabricated an active gas-gap heat switch (AGGHS), which ON/OFF the heat conduction between the 1st stage (0.05–2 K) and the 2nd stage (1–4 K) of a double-stage adiabatic demagnetization refrigerator (DADR). Our design geometrically separates two components which dominates the ON or OFF performance, and achieved heat conductivity of 6 mW/K (ON) or 4 μW/K (OFF) at 2 K. The ON/OFF is controlled by a heater attached to the charcoal box to adsorb/deadsorb4He gas inside. We introduced the AGGHS to the DADR and successfully cooled the detector stage down to 60 mK, working properly more than a year.