Zijie Pan
(Key Laboratory of Cryogenic Science and Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Science, Beijing 100190, China)
Lingjiao Wei
(Technical Institute of Physics and Chemistry, CAS)
Jiarun Zou
(Key Laboratory of Cryogenic Science and Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Science, Beijing 100190, China)
With the development of the frontier domains such as quantum computing, condensed matter physics and space exploration, there is an urgent need for the multi-stage ultra-low temperature refrigerators to reduce the internal thermal noise and external thermal interference. The superfluid 4He system is a key component at the 1 K stage of ultra-low temperature refrigerators. The cooling capacity of the superfluid 4He system depends on the throttling, liquefaction and evaporation process which were affected by the impedance. In this paper, the influences of the impedance parameters, the flow rates and the heat exchange means on the performance of the superfluid 4He system are tested. Based on the above researches, a superfluid 4He system with the minimum temperature of 1.1 K is constructed, which can meet the precooling requirement of the ultra-low temperature refrigerators.
Jiarun Zou
(Key Laboratory of Cryogenic Science and Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Science, Beijing 100190, China)
Ziyao Liu
(Technical Institute of Physics and Chemistry, CAS)
Zijie Pan
(Key Laboratory of Cryogenic Science and Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Science, Beijing 100190, China)
Lingjiao Wei
(Technical Institute of Physics and Chemistry, CAS)
Maowen Zheng
(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences)
Haowen Guo
(Technical Institute of Physics and Chemistry, Chines Academy of Sciences)
Houlei Chen
(1 Key Laboratory of Technology on Space Energy Conversion, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China 2University of Chinese Academy of Sciences, Beijing 100190, China)
Jingtao Liang
(Technical Institute of Physics and Chemistry, CAS)
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