Innovative phase shifter for pulse tube operating below 10 K |
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| Affiliation: | 1. Univ. Grenoble Alpes, INAC-SBT, F-38000 Grenoble, France;2. CEA, INAC-SBT, F-38000 Grenoble, France;3. CNES, 18 avenue Edouard Belin, 31401 Toulouse Cedex 9, Toulouse, France;1. Laboratory for Quantum Engineering and Micro–Nano Energy Technology, Department of Physics, Xiangtan University, Xiangtan, Hunan 411105, China;2. Beijing Computational Science Research Centre, Beijing 100084, China;3. Laboratory of Thin Film Materials, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;1. College of Chemistry and Chemical Engineering, Chongqing University of Technology, 69 Hongguang Road, Lijiatuo, Banan District, Chongqing 400054, PR China;2. College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, PR China;3. Institute of Microstructure and Properties of Advanced Materials, Beijing University of Technology, Beijing 100124, PR China;4. School of Energy Research, Xiamen University, Xiamen 361005, PR China;1. Callaghan Innovation, Christchurch, New Zealand;2. University of Canterbury, Christchurch, New Zealand;3. Auckland University of Technology, Auckland, New Zealand;1. Jaywantrao Sawant College of Engineering, Pune, Maharashtra, India;2. MIT College of Engineering, Pune, Maharashtra, India;3. VJTI, Matunga, Mumbai, India;4. Indian Institute of Technology, Bombay, Mumbai, India;5. MGM CET, Navi Mumbai, India;1. Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China;2. Key Lab. of Ref. & Cryo. Technology of Zhejiang Province, Hangzhou 310027, China;3. TransMIT - Centre of Adaptive Cryotechnology and Sensors, D-35392 Giessen, Germany;4. Institute of Applied Physics, University of Giessen, D-35392 Giessen, Germany |
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| Abstract: | Stirling type pulse tubes are classically based on the use of an inertance phase shifter to optimize their cooling power. The limitations of the phase shifting capabilities of these inertances have been pointed out in various studies. These limitations are particularly critical for low temperature operation, typically below about 50 K. An innovative phase shifter using an inertance tube filled with liquid, or fluid with high density or low viscosity, and separated by a sealed metallic diaphragm has been conceived and tested. This device has been characterized and validated on a dedicated test bench. Operation on a 50–80 K pulse tube cooler and on a low temperature (below 8 K) pulse tube cooler have been demonstrated and have validated the device in operation. These developments open the door for efficient and compact low temperature Stirling type pulse tube coolers. The possibility of long life operation has been experimentally verified and a design for space applications is proposed. |
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| Keywords: | Cryocooler Pulse tube Diaphragm Inertance tube |
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