Soft gamma-ray detector for the ASTRO-H mission

Shin Watanabe*, Hiroyasu Tajima, Yasushi Fukazawa, Roger Blandford, Teruaki Enoto, Jun Kataoka, Madoka Kawaharada, Motohide Kokubun, Philippe Laurent, François Lebrun, Olivier Limousin, Greg Madejski, Kazuo Makishima, Tsunefumi Mizuno, Takeshi Nakamori, Kazuhiro Nakazawa, Kunishiro Mori, Hirokazu Odaka, Masanori Ohno, Masayuki OhtaGoro Sato, Rie Sato, Shin'ichiro Takeda, Hiromitsu Takahashi, Tadayuk Takahashi, Takaaki Tanaka, Makoto Tashiro, Yukikatsu Terada, Hideki Uchiyama, Yasunobu Uchiyama, Shinya Yamada, Yoichi Yatsu, Daisuke Yonetoku, Takayuki Yuasa


研究成果: Conference contribution

34 被引用数 (Scopus)


ASTRO-H is the next generation JAXA X-ray satellite, intended to carry instruments with broad energy coverage and exquisite energy resolution. The Soft Gamma-ray Detector (SGD) is one of ASTRO-H instruments and will feature wide energy band (60-600 keV) at a background level 10 times better than the current instruments on orbit. The SGD is complimentary to ASTRO-H's Hard X-ray Imager covering the energy range of 5-80 keV. The SGD achieves low background by combining a Compton camera scheme with a narrow field-of-view active shield where Compton kinematics is utilized to reject backgrounds. The Compton camera in the SGD is realized as a hybrid semiconductor detector system which consists of silicon and CdTe (cadmium telluride) sensors. Good energy resolution is afforded by semiconductor sensors, and it results in good background rejection capability due to better constraints on Compton kinematics. Utilization of Compton kinematics also makes the SGD sensitive to the gamma-ray polarization, opening up a new window to study properties of gamma-ray emission processes. In this paper, we will present the detailed design of the SGD and the results of the final prototype developments and evaluations. Moreover, we will also present expected performance based on the measurements with prototypes.

ホスト出版物のタイトルSpace Telescopes and Instrumentation 2012
ホスト出版物のサブタイトルUltraviolet to Gamma Ray
出版ステータスPublished - 2012
イベントSpace Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray - Amsterdam, Netherlands
継続期間: 2012 7月 12012 7月 6


名前Proceedings of SPIE - The International Society for Optical Engineering


ConferenceSpace Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学


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