Development of a cryogen-free dilution refrigerator  

作　　者：Zhongqing Ji Jie Fan Jing Dong Yongbo Bian Zhi-Gang Cheng 姬忠庆;樊洁;董靖;边勇波;程智刚(Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China;Songshan Lake Materials Laboratory,Dongguan 523808,China)

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China [3]Songshan Lake Materials Laboratory,Dongguan 523808,China

出　　处：《Chinese Physics B》2022年第12期146-154,共9页中国物理B（英文版）

基　　金：supported by Key Research Program of Frontier Sciences,CAS(Grant No.ZDBS-LY-SLH0010);Beijing Natural Science Foundation(Grant No.JQ21002);Beijing Council of Science and Technology(Grant Nos.Z201100008420006 and Z211100004021012)

摘　　要：With thermal fluctuation strongly suppressed,low temperature environment is essential for studies of condensed matter physics and developments of quantum technologies.Ultra-low temperature below 20 m K has demonstrated its importance and significance in physical sciences and information techniques.Dilution refrigeration is by far the best feasible and reliable method to generate and keep lattice temperature in this range.With a potential shortage of helium supply,cryogen-free dilution refrigerator(CFDR),eliminating the necessity of regular helium refill,becomes the main facility for the purpose of creating ultralow temperature environments.Here we describe our successful construction of a CFDR which reached a base temperature of around 10.9 m K for continuous circulation and 8.6 m K for single-shot operation.We describe its operating mechanism and the designs of key components,especially some unique designs including heat switch and alumina thermal link.Possible improvements in the future are also discussed.

关 键 词：cryogen-free dilution refrigerator heat exchanger cooling power HELIUM 

分 类 号：TB651[一般工业技术—制冷工程]