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Proceedings Paper

Development of a near-infrared detector and a fiber-optic integral field unit for a space solar observatory SOLAR-C
Author(s): Yukio Katsukawa; Yukiko Kamata; Tetsu Anan; Hirohisa Hara; Yoshinori Suematsu; Takamasa Bando; Kiyoshi Ichimoto; Toshifumi Shimizu
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Paper Abstract

We are developing a high sensitivity and fast readout near-infrared (NIR) detector and an integral field unit (IFU) for making spectro-polarimetric observations of rapidly varying chromospheric spectrum lines, such as He I 1083 nm and Ca II 854 nm, in the next space-based solar mission SOLAR-C. We made tests of a 1.7 μm cutoff H2RG detector with the SIDECAR ASIC for the application in SOLAR-C. It’s important to verify its perfor- mance in the temperature condition around -100 °C, which is hotter than the typical temperature environment used for a NIR detector. We built a system for testing the detector between -70 °C and -140 °C. We verified linearity, read-out noise, and dark current in both the slow and fast readout modes. We found the detector has to be cooled down lower than -100 °C because of significant increase of the number of hot pixels in the hotter environment. The compact and polarization maintenance IFU was designed using fiber-optic ribbons consisting of rectangular cores which exhibit good polarization maintenance. A Silicone adhesive DC-SE9187L was used to hold the fragile fiber-optic ribbons in a metal housing. Polarization maintenance property was confirmed though polarization calibration as well as temperature control are required to suppress polarization crosstalk and to achieve the polarization accuracy in SOLAR-C.

Paper Details

Date Published: 9 August 2016
PDF: 9 pages
Proc. SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 99045I (9 August 2016); doi: 10.1117/12.2234547
Show Author Affiliations
Yukio Katsukawa, National Astronomical Observatory of Japan (Japan)
Yukiko Kamata, National Astronomical Observatory of Japan (Japan)
Tetsu Anan, Kyoto Univ. (Japan)
Hirohisa Hara, National Astronomical Observatory of Japan (Japan)
Yoshinori Suematsu, National Astronomical Observatory of Japan (Japan)
Takamasa Bando, National Astronomical Observatory of Japan (Japan)
Kiyoshi Ichimoto, Kyoto Univ. (Japan)
National Astronomical Observatory of Japan (Japan)
Toshifumi Shimizu, Japan Aerospace Exploration Agency (Japan)


Published in SPIE Proceedings Vol. 9904:
Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave
Howard A. MacEwen; Giovanni G. Fazio; Makenzie Lystrup; Natalie Batalha; Nicholas Siegler; Edward C. Tong, Editor(s)

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