High-Temperature Superconducting Space Experiment II (HTSSE II) Overview and Preliminary Cryocooler Integration Experience
Imaging space applications have been the driving force behind the development of long life high reliability cryocooler development. A less well known application is High Temperature Superconducting (HTS) devices. At 60 to 80°K large performance gains are possible in thallium and yttrium based HTS microwave devices for communications applications. The High Temperature Space Experiment II (HTSSE II) is the first application of space HTS technology. The new generations of clearance seal mechanical refrigerators offer the potential for continuous long life high reliability operation, but there has been little space flight experience to demonstrate this potential. HTSSE II utilizes a British Aerospace 80K Stirling cycle cryocooler to cryocool a central cold bus of 7 HTS experiments and has an additional standalone TRW HTS experiment cooled by a TRW Stirling cycle cryocooler. In addition to introducing a HTS device space application, the goal of this paper is to provide an introduction to the cryogenic design of HTSSE II, the decision processes that formed it, and cryocooler integration design experience. The design presented has completed half of it’s qualification program and thus is preliminary in nature.
KeywordsHigh Temperature Superconducting Transverse Force Naval Research Laboratory Cold Finger Functional Block Diagram
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