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Proceedings Paper

Development of the soft x-ray imager (SXI) for ASTRO-H
Author(s): Kiyoshi Hayashida; Hiroshi Tsunemi; Takeshi Go Tsuru; Tadayasu Dotani; Hiroshi Nakajima; Naohisa Anabuki; Masanobu Ozaki; Chikara Natsukari; Junko S. Hiraga; Hiroshi Tomida; Takayoshi Kohmura; Hiroshi Murakami; Koji Mori; Makoto Yamauchi; Isamu Hatsukade; Aya Bamba; Hiroyuki Uchida; Masayoshi Nobukawa; Shutaro Ueda; Takahisa Fujinaga; Keiko Matsuta; Takao Ohnishi; John P. Doty
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Paper Abstract

Soft X-ray Imager (SXI) is a CCD camera onboard the ASTRO-H satellite which is scheduled to be launched in 2014. The SXI camera contains four CCD chips, each with an imaing aread of 31mmx31 mm, arrayed in mosaic, which cover the whole FOV area of 38'x38'. The SXI CCD of which model name is HPK Pch-NeXT4 is a P-channel type, back-illuminated, fully depleted device with a thickness of 200μm. We have developed an engineering model of the SXI camera body with coolers, and analog electronics for them. Combined with the bread board digital electronics, we succeeded in operation the whole the SXI system. The CCDs are cooled down to -120°C with this system, and X-rays from 55Fe sources are detected. Although optimization of the system is in progress, the energy resolution of typical 200 eV and best 156 eV (FWHM) at 5.9 keV are obtained. The readout noise is 10 e- to 15 e-, and to be improved its goal value of 5 e-. On-going function tests and environment tests reveal some issues to be solved until the producntion of the SXI flight model in 2012.

Paper Details

Date Published: 13 September 2011
PDF: 9 pages
Proc. SPIE 8145, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XVII, 814505 (13 September 2011); doi: 10.1117/12.893400
Show Author Affiliations
Kiyoshi Hayashida, Osaka Univ. (Japan)
Hiroshi Tsunemi, Osaka Univ. (Japan)
Takeshi Go Tsuru, Kyoto Univ. (Japan)
Tadayasu Dotani, Japan Aerospace Exploration Agency (Japan)
Hiroshi Nakajima, Osaka Univ. (Japan)
Naohisa Anabuki, Osaka Univ. (Japan)
Masanobu Ozaki, Japan Aerospace Exploration Agency (Japan)
Chikara Natsukari, Japan Aerospace Exploration Agency (Japan)
Junko S. Hiraga, The Univ. of Tokyo (Japan)
Hiroshi Tomida, Japan Aerospace Exploration Agency (Japan)
Takayoshi Kohmura, Kogakuin Univ. (Japan)
Hiroshi Murakami, Rikkyo Univ. (Japan)
Koji Mori, Univ. of Miyazaki (Japan)
Makoto Yamauchi, Univ. of Miyazaki (Japan)
Isamu Hatsukade, Univ. of Miyazaki (Japan)
Aya Bamba, Aoyama Gakuin Univ. (Japan)
Hiroyuki Uchida, Kyoto Univ. (Japan)
Masayoshi Nobukawa, Kyoto Univ. (Japan)
Shutaro Ueda, Osaka Univ. (Japan)
Takahisa Fujinaga, Japan Aerospace Exploration Agency (Japan)
Keiko Matsuta, Japan Aerospace Exploration Agency (Japan)
Takao Ohnishi, Kyoto Univ. (Japan)
John P. Doty, Noqsi Aerospace (United States)

Published in SPIE Proceedings Vol. 8145:
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XVII
Oswald H. Siegmund, Editor(s)

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