Abstract
A high-capacity single-stage coaxial pulse tube cryocooler operating at around 60K has been developed to provide the appropriate cooling for the next-generation very-large-scale long wave infrared focal plane arrays under development. The application background and cooler design process are described, and the performance characteristics are presented. At present, the cooler typically provides 4.06W at 60K with the input power of 180W at 300K reject temperature. 4.72W can also be achieved when the input power increases to 200W, and over 9.4% of Carnot efficiency at 60K has been realized. The larger pulse tube diameter of 14.2mm is used and the evident orientation sensitivity is observed in the range of 55–65Hz. The experiments also observe the obvious reject temperature dependence.
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