Abstract
High-frequency pulse tube cryocoolers (HPTCs) have become an important potential alternative for providing liquid-helium temperature cooling in space due to the advantages of compact structure, high stability, and low vibration. At present, it is difficult for HPTC to obtain cooling temperatures below 4 K and higher cooling capacity, so it is necessary to optimize its components such as the regenerator and phase shifters to enhance its competitiveness. A two-stage gas-coupled HPTC with a pre-cooling temperature of 77 K was developed. Firstly, the design and simulation of the entire structure were carried out with Sage, and the key parameters affecting the refrigeration performance were investigated. The simulation results were then verified by experiment and the cooling capacities of different temperatures were tested. With an input power of 450 W, the prototype obtained a no-load temperature of 3.5 K, while the largest cooling capacities of 14 mW at 4.2 K and 34 mW at 5.0 K can be provided with an input power of 540 W. Further decreasing the temperature and supplying a considerable cooling capacity at 4 K will be the focus of the follow-up work.
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Acknowledgments
The project is supported by the National Natural Science Foundation of China (No. 12073058, U1831203), the China National Space Administration (No. D050104, D040305), the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (No. QYZDY-SSW- JSC028), and the Youth Innovation Promotion Association of Chinese Academy of Sciences (No. 2019030).
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Yang, B., Gao, Z., Xi, X., Chen, L., Wang, J. (2023). A Pre-cooling Type High-Frequency Pulse Tube Cryocooler Working at Liquid-Helium Temperatures. In: Qiu, L., Wang, K., Ma, Y. (eds) Proceedings of the 28th International Cryogenic Engineering Conference and International Cryogenic Materials Conference 2022. ICEC28-ICMC 2022. Advanced Topics in Science and Technology in China, vol 70. Springer, Singapore. https://doi.org/10.1007/978-981-99-6128-3_91
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DOI: https://doi.org/10.1007/978-981-99-6128-3_91
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