Performances of the 50 mK ADR/sorption cooler |
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| Authors: | N Luchier JM Duval L Duband T Tirolien |
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| Affiliation: | 1. SBT, UMR-E CEA/UJF-Grenoble 1, INAC, Grenoble F-38054, France;2. ESA/ESTEC, Noordwijk, The Netherlands;1. NASA Kennedy Space Center, M/S: NE-F6 Kennedy Space Center, FL, USA, 32899;2. NASA Marshall Space Flight Center, M/S:ER-24 Huntsville, AL, USA, 35812;1. Chinese Academy of Sciences Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100190, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Department of Physics and Center for Astrophysics, Tsinghua University, Beijing 100084, China;1. Programa de Pós-graduação em Engenharia Mecânica, Universidade Federal de Minas Gerais, Brazil;2. CNRS, INSA-Lyon, Université Claude Bernard Lyon 1, CETHIL UMR5008, France;3. Departament of Mechanical Engineering, School of Engineering, Aalto University, Finland;4. Institute of Mechanical Engineering, Federal University of Itajubá, Brazil;1. Key Laboratory of Technology on Space Energy Conversion, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China;2. University of Chinese Academy of Sciences, Beijing, China |
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| Abstract: | CEA/SBT is currently testing a 50 mK cooler developed in the framework of a European Space Agency Technological Research Program targeted for the Advanced Telescope for High Energy Astrophysics space mission. This cooler is composed of a small demagnetization refrigerator pre cooled by a sorption cooler stage. This Engineering Model is able to produce 1 μW of net heat lift at 50 mK and an additional 10 μW at 300 mK provided by the sorption cooler stage. The autonomy of the cooler is 24 h, and once the low temperature phase at 50 mK is over, it can be recycled in about 8 h with 10 μW and 100 μW available at respectively the 2.5 and 15 K heat sinks. These performances are in agreement with the European Space Agency requirements.In this paper, we present the detailed thermal performances of the cooler in nominal conditions as well as sensitivity measurements of the variation of the heat sink and the cold end temperatures. |
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