Abstract
Recently, the development of a thermoacoustic cryocooler is noticed. The cryocooler without moving parts is realized, when the thermoacoustic compressor is combined with a pulse tube. However, the small thermoacoustic compressor is not fund. We have developed a small-size Vuilleumier cryocooler. It has the cooling capacity over 1.5 watts at 80 K. The thermal compressor unit of the Vuilleumier cryocooler was utilized for a heat-driven pulse tube cooler. Since ratio of a volume of pulse tube and a swept volume of thermal compressor is not appropriate, the cooler performance is lower than the Vuilleumier cryocooler. This report describes the result of the initial function test for cryocooler while the structure of produced machine.
