Optimization of an 8K Level High Frequency Pulse Tube Cryocooler

27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018

Quan, J.^1 ; Liu, Y.J.^1 ; Xun, Y.Q.^1 ; Ma, Y.X.^1 ; Liang, J.T.^1

Key Laboratory of Space Energy Conversion Technologies, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing

100190, China^1

关键词: Cooling power;    Electric power;    High frequency pulse tube cryocooler;    Pulse tube cryocoolers;    Regenerator materials;    Space detection;    Terahertz detectors;    Very low temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012024/pdf
DOI  :  10.1088/1757-899X/502/1/012024

来源: IOP

【 摘 要 】

As very low temperature high frequency pulse tube cryocooler is the precondition of many space detection researches, it has been a hot topic in the field of pulse tube cryocooler. Improving the cryocooler's performance is a common goal of researchers. In this paper, the regenerator material and the compressor of the second-stage pulse tube cryocooler as well as the first-stage pulse tube cryocooler are experimentally optimized using a new thermally coupled high frequency pulse tube cryocooler. Finally, more than 20mW of cooling power is achieved at 8K and the electric power decreases from 450W to 300W. The results increase the reliability of the space application of NbN terahertz detectors.