The Optimization of a High Frequency Micro Pulse Tube Cryocooler

Abstract A micro coaxial pulse tube cryocooler has been developed to meet the requirements of high operating temperature infrared detection in space applications. To increase the efficiency of the cryocooler, the optimization experiments were designed. Driven by a double-piston opposed linear compressor with the mass less than 200 g, this cryocooler uses the inertance tubes and a reservoir as phase shifter and has the regenerator with a diameter of 10 mm. The effect of the operating frequencies and charging pressure on cooling performance were investigated through a series of experiments. This cryocooler can provide a cooling power of 0.61 W at 150 K with an input electric power of 10 W. This paper describes the optimizing processes and presents test data in detail.