Optimization of cryogenic architecture for LiteBIRD satellite using radiative cooling
Optimization of cryogenic architecture for LiteBIRD satellite using radiative cooling
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利用辐射冷却优化 LiteBIRD 卫星低温架构
DOI:
10.1117/1.jatis.5.4.044002
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Yoshida Seiji
中科院分区:
文献类型:
--
作者:
Hasebe Takashi;Sekimoto Yutaro;Dotani Tadayasu;Mitsuda Kazuhisa;Shinozaki Keisuke;Yoshida Seiji
Radiative cooling with thermal isolation shields can provide a reliable cooling system for instruments onboard satellites in orbit. We report the optimization study for the cryogenic architecture of the LiteBIRD satellite using radiative cooling. A trade study that changed the number of thermal shields and shield emissivity were conducted. The heat flow from 300 to 4.5 K, including active cooling by mechanical cryocoolers, was evaluated among the trade designs. We found that the design that consists of low-emissivity four-layer thermal shields is optimum in terms of thermal performance and system design. The optimum design achieved a heat load of 29.9 mW for the 4.5-K cooling stage, whereas the requirement was 30 mW with the assumed cryogenic system.
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DOI:
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发表时间:
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期刊:
Astronomical Telescopes + Instrumentation
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The Journal of Space Technology and Science
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