Miniature Pulse Tube Research
Y. Luwei, L. Jingtao, Z. Yuan, C. Houlei
Chin. Acad. of Sci., Beijing, China
High frequency pulse tube coolers have made great progress in the past ten years. The coaxial configuration is the most attractive version to customers because of the similarity to the Stirling expander. For some application such as the standard dewar, the coaxial structure is required and the diameter of pulse tube cryocooler (PTC) cold finger is also an important parameter. A small regenerator diameter, such as 6 mm, is needed for some applications. In this paper, the design and test of a 6 mm diameter coaxial PTC is introduced and compared. The no-load temperature of 67 K with 30 W input power, and about 0.2 W at 80 K cooling power has been achieved. The simulation result is about 10K cooler than the test. This indicates that there is still margin for improvement.