An experimental investigation of the pulse tube refrigerator

The experimental results of the pulse tube refrigerator are presented in this paper. The pulse tube refrigerator, which has no moving parts at its cold section, is attractive in obtaining higher reliability, simpler construction, and lower vibration than any other small refrigerators. The objectives of this study are to develop the design technology of pulse tube refrigerator and acquire its application technique. As a preliminary test, the refrigeration performance of the basic, orifice, and double inlet pulse tube refrigerators were investigated. The lowest temperature obtained in the single-stage pulse tube refrigerator was 34.4K and the refrigeration capacity at the optimum operation condition was 23W at 80K. The lowest temperature of the second stage cold head in the two-stage pulse tube refrigerator was 18.3K and the refrigeration capacities at the optimum condition were 0.45W at 20K and 20W at 80K respectively.