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Proceedings Paper

Thermal design utilizing radiative cooling for the payload module of LiteBIRD
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Paper Abstract

The conceptual thermal design of the payload module (PLM) of LiteBIRD utilizing radiative cooling is studied. The thermal environment and structure design of the PLM strongly depend on the precession angle α of the spacecraft. In this study, the geometrical models of the PLM that consist of the sunshield, three layers of Vgrooves, and 5 K shield were designed in the cases of α = 45° , 30° , and 5° . The mission instruments of LiteBIRD are cooled down below 5 K. Therefore, heat transfers down to the 5 K cryogenic part were estimated in each case of α. The radiative heat transfers were calculated by using geometrical models of the PLM. The conductive heat transfers and the active cooling with cryocoolers were considered. We also studied the case that the inner surface of the V-groove is coated by a high-emissivity material.

Paper Details

Date Published: 12 July 2018
PDF: 9 pages
Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 1069864 (12 July 2018); doi: 10.1117/12.2313034
Show Author Affiliations
Takashi Hasebe, Institute of Space and Astronautical Science (Japan)
Japan Aerospace Exploration Agency (Japan)
Shingo Kashima, National Astronomical Observatory of Japan (Japan)
Satoru Uozumi, Okayama Univ. (Japan)
Hirokazu Ishino, Okayama Univ. (Japan)
Shin Utsunomiya, Kavli Institute for the Physics and Mathematics of the Universe (Japan)
Univ. of Tokyo (Japan)
Hirofumi Noda, Tohoku Univ. (Japan)
Kazuhisa Mitsuda, Institute of Space and Astronautical Science (Japan)
Japan Aerospace Exploration Agency (Japan)
Yutaro Sekimoto, Institute of Space and Astronautical Science (Japan)
Japan Aerospace Exploration Agency (Japan)
Tadayasu Dotani, Institute of Space and Astronautical Science (Japan)
Japan Aerospace Exploration Agency (Japan)
Tomotake Matsumura, Kavli Institute for the Physics and Mathematics of the Universe (Japan)
Univ. of Tokyo (Japan)
Hajime Sugai, Kavli Institute for the Physics and Mathematics of the Universe (Japan)
Univ. of Tokyo (Japan)
Masahiro Tsujimoto, Institute of Space and Astronautical Science (Japan)
Japan Aerospace Exploration Agency (Japan)
Hiroaki Imada, Institute of Space and Astronautical Science (Japan)
Japan Aerospace Exploration Agency (Japan)
Masashi Hazumi, High Energy Accelerator Research Organization, KEK (Japan)


Published in SPIE Proceedings Vol. 10698:
Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave
Makenzie Lystrup; Howard A. MacEwen; Giovanni G. Fazio; Natalie Batalha; Nicholas Siegler; Edward C. Tong, Editor(s)

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