Abstract
Experimental results of pulse tube refrigerator, carried out to improve its characteristics, are reported.
Pulse tube refrigerator is one of the new type refrigeration systems developed by W. E. Gifford, utilizes the phenomena of heat ejection on gas compression and absorption on expansion.
In our experiment a temperature decrease of 156°K with a single pulse tube with helium gas was attained, and it was concluded that the minimum attainable temperature is a function of volume ratio, pulse rate, and pulse wave form.
Furthermore, it was found that the performance of the pulse tube is improved by extending the heat transfer surface in the tube.
