Abstract
We report on system design of 60 K Stirling-type coaxial pulse tube coolers for the purpose of developing a fully integrated, cryogen-free operation of HTS RF filter subsystem for wireless telecommunications. Two different cold finger geometries of single-stage and two-stage pulse tube coolers are analyzed and designed. The design objective of the coolers is for 3.5 W of cooling capacity at 65 K with a specific power of 30 W/W. The construction of the cooled HTS filter subsystem integrated with the coolers is also described.
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