Development of a 35 K single-stage coaxial pulse tube cryocooler

Abstract

Abstract A high-efficiency, single-stage coaxial pulse tube cryocooler has been developed for the purpose of operating at approximately 35 K, specifically targeting long-wavelength infrared detectors. The present study outlines the design considerations and discusses the optimizations made to the length of the regenerator. By conducting experimental investigations, the prototype of the cooler has successfully achieved a no-load temperature of 24 K. This was accomplished by incorporating an inertance tube and reservoir as the phase-shifter. By incorporating the double-inlet into the phase-shifter, it is possible to attain a lower temperature of 21 K. At present, the current cooler prototype demonstrates a cooling capacity of 2 W at 35 K with an input power of 200 W at a frequency of 37 Hz. Additionally, a comprehensive presentation of the key parameters and performance of the designed PTC is provided.