The Soft X-ray Imager (SXI) for the ASTRO-H Mission

Takaaki Tanaka; Hiroshi Tsunemi; Kiyoshi Hayashida; Takeshi G. Tsuru; Tadayasu Dotani; Hiroshi Nakajima; Naohisa Anabuki; Ryo Nagino; Hiroyuki Uchida; Masayoshi Nobukawa; Masanobu Ozaki; Chikara Natsukari; Hiroshi Tomida; Shutaro Ueda; Masashi Kimura; Junko S. Hiraga; Takayoshi Kohmura; Hiroshi Murakami; Koji Mori; Makoto Yamauchi; Isamu Hatsukade; Yusuke Nishioka; Aya Bamba; John P. Doty

doi:10.1117/12.2190808

18 September 2015 The Soft X-ray Imager (SXI) for the ASTRO-H Mission

Takaaki Tanaka, Hiroshi Tsunemi, Kiyoshi Hayashida, Takeshi G. Tsuru, Tadayasu Dotani, Hiroshi Nakajima, Naohisa Anabuki, Ryo Nagino, Hiroyuki Uchida, Masayoshi Nobukawa, Masanobu Ozaki, Chikara Natsukari, Hiroshi Tomida, Shutaro Ueda, Masashi Kimura, Junko S. Hiraga, Takayoshi Kohmura, Hiroshi Murakami, Koji Mori, Makoto Yamauchi, Isamu Hatsukade, Yusuke Nishioka, Aya Bamba, John P. Doty

Author Affiliations +

Proceedings Volume 9601, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIX; 96010E (2015) https://doi.org/10.1117/12.2190808
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

The Soft X-ray Imager (SXI) is an X-ray CCD camera onboard the ASTRO-H X-ray observatory. The CCD chip used is a P-channel back-illuminated type, and has a 200-µm thick depletion layer, with which the SXI covers the energy range between 0.4 keV and 12 keV. Its imaging area has a size of 31 mm x 31 mm. We arrange four of the CCD chips in a 2 by 2 grid so that we can cover a large field-of-view of 38’ x 38’. We cool the CCDs to -120 °C with a single-stage Stirling cooler. As was done for the CCD camera of the Suzaku satellite, XIS, artificial charges are injected to selected rows in order to recover charge transfer inefficiency due to radiation damage caused by in-orbit cosmic rays. We completed fabrication of flight models of the SXI and installed them into the satellite. We verified the performance of the SXI in a series of satellite tests. On-ground calibrations were also carried out and detailed studies are ongoing.

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Takaaki Tanaka, Hiroshi Tsunemi, Kiyoshi Hayashida, Takeshi G. Tsuru, Tadayasu Dotani, Hiroshi Nakajima, Naohisa Anabuki, Ryo Nagino, Hiroyuki Uchida, Masayoshi Nobukawa, Masanobu Ozaki, Chikara Natsukari, Hiroshi Tomida, Shutaro Ueda, Masashi Kimura, Junko S. Hiraga, Takayoshi Kohmura, Hiroshi Murakami, Koji Mori, Makoto Yamauchi, Isamu Hatsukade, Yusuke Nishioka, Aya Bamba, and John P. Doty "The Soft X-ray Imager (SXI) for the ASTRO-H Mission", Proc. SPIE 9601, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIX, 96010E (18 September 2015); https://doi.org/10.1117/12.2190808

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