Abstract
A single-stage 10W/90K coaxial pulse tube cryocooler has been developed for space-borne optics cooling. The design considerations are described, and the optimizations on the double-segmented inertance tubes are presented. The preliminary engineering model (EM) of the cooler has been worked out, which typically provides the cooling of 10W at 90K with the input power of 175.6W at 310K reject temperature, and achieves around 14% of Carnot efficiency at 90K. The reject temperature dependence experiments on the EM show a smaller slope of 10.2W/10K and indicate a good adaptability to the reject temperature range from 290K to 333K.
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