A design method of flexible thermal strap for cryogenic optics based on pyrolytic graphite film

Jing Qian; Yu Cheng; Shukui Ma; Xiaoming Lu; Maotong Huang; Peng Rao; Yaopu Zou

doi:10.1117/12.2665693

31 January 2023 A design method of flexible thermal strap for cryogenic optics based on pyrolytic graphite film

Jing Qian, Yu Cheng, Shukui Ma, Xiaoming Lu, Maotong Huang, Peng Rao, Yaopu Zou

Proceedings Volume 12505, Earth and Space: From Infrared to Terahertz (ESIT 2022); 1250525 (2023) https://doi.org/10.1117/12.2665693
Event: Earth and Space: From Infrared to Terahertz (ESIT 2022), 2022, Nantong, China

Abstract

Flexible thermal strap is a key component for space optical system to realize cold transfer, insulate vibration. The thermal link based on high thermal conductivity graphene film becomes a hot spot for this application. In order to reduce the loss in the heat transfer process, a study on the heat transfer performance and structural form of the thermal link made by pyrolytic graphite films (PGF) is carried out, the thermal resistance network model of the thermal strap is analyzed, the relationship between the heat transfer, the heat transfer temperature difference at the mounting surface and the number of graphite film layers is established by combining theoretical analysis and DOE design methods. A method for quickly determining the design parameters of the thermal strap is proposed. The PGF thermal strap designed according to this method achieves a small temperature difference which less than 1.7K between the cold tip and the simulated optical bench coupling surface, a length of 117mm for the strap, and a weight of only 60g, when it used to transfer 5W cooling capacity at 200K.

Citation Download Citation

Jing Qian, Yu Cheng, Shukui Ma, Xiaoming Lu, Maotong Huang, Peng Rao, and Yaopu Zou "A design method of flexible thermal strap for cryogenic optics based on pyrolytic graphite film", Proc. SPIE 12505, Earth and Space: From Infrared to Terahertz (ESIT 2022), 1250525 (31 January 2023); https://doi.org/10.1117/12.2665693

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