Preliminary design of a 4-K mechanical cooling system for the HUBS mission

Liubiao Chen; Xuming Liu; Biao Yang; Xiaotong Xi; Hai Jin; Wei Cui; Junjie Wang

doi:10.1117/12.2561831

13 December 2020 Preliminary design of a 4-K mechanical cooling system for the HUBS mission

Liubiao Chen, Xuming Liu, Biao Yang, Xiaotong Xi, Hai Jin, Wei Cui, Junjie Wang

Proceedings Volume 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray; 114442U (2020) https://doi.org/10.1117/12.2561831
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

The high-resolution X-ray imaging spectrometer of the Hot Universe Baryon Surveyor (HUBS) mission is based on the superconducting transition edge sensor (TES) technology. A TES serves as a thermometer for sensing the temperature change of a microcalorimeter to measure the energy of incident X-rays. In order to achieve high sensitivity, TES needs to operate at temperatures below 100 mK. A combination of a 4 K pre-cooling system and a sub-K cooling system is required to achieve such a low temperature. In this paper, it is proposed to directly obtain the 4 K temperature by a high frequency pulse tube cryocooler (HPTC) for HUBS. The advantages of this technology is compact structure and high reliability, compared with other technologies (for instance, multi-stage Stirling cryocoolers + Joule-Thompson cooler). We have constructed a multi-stage HPTC. The test cooling performance, as well as the design of the cryocooler, existing challenges and proposed solutions will be presented.

Conference Presentation

Citation Download Citation

Liubiao Chen, Xuming Liu, Biao Yang, Xiaotong Xi, Hai Jin, Wei Cui, and Junjie Wang "Preliminary design of a 4-K mechanical cooling system for the HUBS mission", Proc. SPIE 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, 114442U (13 December 2020); https://doi.org/10.1117/12.2561831

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