Cryogenic system of the infrared space mission SPICA

Takao Nakagawa; Ken Goto; Hidehiro Kaneda; Hideo Matsuhara; Jun Matsumoto; Tadahito Mizutani; Hiroyuki Ogawa; Masaru Saijo; Yoichi Sato; Kenichiro Sawada; Hiroshi Shibai; Keisuke Shinozaki; Hiroyuki Sugita; Shinsuke Takeuchi; Chihiro Tokoku; Thierry Tirolien; Hideki Uchida

doi:10.1117/12.2561882

13 December 2020 Cryogenic system of the infrared space mission SPICA

Takao Nakagawa, Ken Goto, Hidehiro Kaneda, Hideo Matsuhara, Jun Matsumoto, Tadahito Mizutani, Hiroyuki Ogawa, Masaru Saijo, Yoichi Sato, Kenichiro Sawada, Hiroshi Shibai, Keisuke Shinozaki, Hiroyuki Sugita, Shinsuke Takeuchi, Chihiro Tokoku, Thierry Tirolien, Hideki Uchida

Author Affiliations +

Proceedings Volume 11443, Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave; 1144328 (2020) https://doi.org/10.1117/12.2561882
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

We present an overview of the cryogenic system of the next-generation infrared observatory mission SPICA. One of the most critical requirements for the SPICA mission is to cool the whole science equipment, including the 2.5 m telescope, to below 8 K to reduce the thermal background and enable unprecedented sensitivity in the mid- and far-infrared region. Another requirement is to cool focal plane instruments to achieve superior sensitivity. We adopt the combination of effective radiative cooling and mechanical cryocoolers to accomplish the thermal requirements for SPICA. The radiative cooling system, which consists of a series of radiative shields, is designed to accommodate the telescope in the vertical configuration. We present thermal model analysis results that comply with the requirements to cool the telescope and focal plane instruments.

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Takao Nakagawa, Ken Goto, Hidehiro Kaneda, Hideo Matsuhara, Jun Matsumoto, Tadahito Mizutani, Hiroyuki Ogawa, Masaru Saijo, Yoichi Sato, Kenichiro Sawada, Hiroshi Shibai, Keisuke Shinozaki, Hiroyuki Sugita, Shinsuke Takeuchi, Chihiro Tokoku, Thierry Tirolien, and Hideki Uchida "Cryogenic system of the infrared space mission SPICA", Proc. SPIE 11443, Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave, 1144328 (13 December 2020); https://doi.org/10.1117/12.2561882

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