Abstract Over 20 Stirling-type nonmagnetic and nonmetallic pulse tube cryocoolers (NNPTCs) intended to support the portable cryogen-free low-noise continuous operation of high-Tc SQUIDs have been constructed and tested at CL/TIPC/CAS. All cooler components in the vicinity of the SQUIDs’ pickup loops are made of nonmagnetic and nonmetallic materials to eliminate cooler-generated interference and to realize direct coupling with the SQUIDs. The system designs are described, and the positive and negative effects of the use of nonmetallic materials on the cooler performance are analyzed. A set of experiments on 24 Stirling-type NNPTCs have been carried out to optimize the cooler geometry and working parameters, and to investigate the working principles of the coolers. Preliminary results are considered satisfactory, and the analysis and evaluation of the cooling performance and interference characteristics of this new-type pulse tube cooler are presented.
Performance Investigation of Stirling-Type Nonmagnetic and Nonmetallic Pulse Tube Cryocoolers for High-Tc SQUID Operation
Cryocoolers 13 ; 411-420
2005-01-01
10 pages
Article/Chapter (Book)
Electronic Resource
English
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