Thermal design of the Solar-C (EUVST) telescope

Yoshinori Suematsu; Toshifumi Shimizu; Hirohisa Hara; Tomoko Kawate; Yukio Katsukawa; Kiyoshi Ichimoto; Shinsuke Imada; Kazuhiro Nagae; Atsumu Yamazaki; Tomoya Hattori

doi:10.1117/12.2560941

13 December 2020 Thermal design of the Solar-C (EUVST) telescope

Yoshinori Suematsu, Toshifumi Shimizu, Hirohisa Hara, Tomoko Kawate, Yukio Katsukawa, Kiyoshi Ichimoto, Shinsuke Imada, Kazuhiro Nagae, Atsumu Yamazaki, Tomoya Hattori

Author Affiliations +

Proceedings Volume 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray; 114443K (2020) https://doi.org/10.1117/12.2560941
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

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Abstract

The EUV High-Throughput Spectroscopic Telescope (EUVST) of Solar-C mission consists of only two imaging optical components; a 28-cm clear aperture off-axis parabolic primary mirror and a two-split ellipsoidal grating without a blocking filter for visible light before the primary mirror to achieve unprecedented high spatial and temporal resolution in EUV-UV imaging spectroscopic observations. For this reason, about 60 W of sunlight is absorbed by the multilayer coating on the mirror. We report a thermal design of telescope in which the temperature of the primary mirror bonding part and underlying tip-tilt and slit-scanning mechanisms is well lower than a glass transition temperature of adhesive (about 60°C) and thermal deformation of the primary mirror is small, although it is non-negligibly small.

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Yoshinori Suematsu, Toshifumi Shimizu, Hirohisa Hara, Tomoko Kawate, Yukio Katsukawa, Kiyoshi Ichimoto, Shinsuke Imada, Kazuhiro Nagae, Atsumu Yamazaki, and Tomoya Hattori "Thermal design of the Solar-C (EUVST) telescope", Proc. SPIE 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, 114443K (13 December 2020); https://doi.org/10.1117/12.2560941

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