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Proceedings Paper

Soft gamma-ray detector for the ASTRO-H Mission
Author(s): 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 Ohta; Goro Sato; Rie Sato; Shin'ichiro Takeda; Hiromitsu Takahashi; Tadayuki Takahashi; Takaaki Tanaka; Makoto Tashiro; Yukikatsu Terada; Hideki Uchiyama; Yasunobu Uchiyama; Shinya Yamada; Yoichi Yatsu; Daisuke Yonetoku; Takayuki Yuasa
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Paper Abstract

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.

Paper Details

Date Published: 17 September 2012
PDF: 19 pages
Proc. SPIE 8443, Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray, 844326 (17 September 2012); doi: 10.1117/12.925977
Show Author Affiliations
Shin Watanabe, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
The Univ. of Tokyo (Japan)
Hiroyasu Tajima, Solar Terrestrial Environment Lab., Nagoya Univ. (Japan)
Yasushi Fukazawa, Hiroshima Univ. (Japan)
Roger Blandford, Kavli Institute for Particle Astrophysics and Cosmology, Stanford Univ. (United States)
Teruaki Enoto, Cosmic Radiation Lab., Institute of Physical and Chemical Research, RIKEN (Japan)
Jun Kataoka, Waseda Univ. (Japan)
Madoka Kawaharada, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Motohide Kokubun, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Philippe Laurent, CEA Saclay (France)
François Lebrun, CEA Saclay (France)
Olivier Limousin, CEA Saclay (France)
Greg Madejski, Kavli Institute for Particle Astrophysics and Cosmology, Stanford Univ. (United States)
Kazuo Makishima, Univ. of Tokyo (Japan)
Tsunefumi Mizuno, Hiroshima Univ. (Japan)
Takeshi Nakamori, Waseda Univ. (Japan)
Kazuhiro Nakazawa, The Univ. of Tokyo (Japan)
Kunishiro Mori, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Hirokazu Odaka, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Masanori Ohno, Hiroshima Univ. (Japan)
Masayuki Ohta, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Goro Sato, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Rie Sato, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Shin'ichiro Takeda, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Hiromitsu Takahashi, Hiroshima Univ. (Japan)
Tadayuki Takahashi, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
The Univ. of Tokyo (Japan)
Takaaki Tanaka, Kyoto Univ. (Japan)
Makoto Tashiro, Saitama Univ. (Japan)
Yukikatsu Terada, Saitama Univ. (Japan)
Hideki Uchiyama, The Univ. of Tokyo (Japan)
Yasunobu Uchiyama, Kavli Institute for Particle Astrophysics and Cosmology, Stanford Univ. (United States)
Shinya Yamada, Cosmic Radiation Lab., Institute of PhysIcal and Chemical Research, RIKEN (Japan)
Yoichi Yatsu, Tokyo Institute of Technology (Japan)
Daisuke Yonetoku, Kanazawa Univ. (Japan)
Takayuki Yuasa, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)


Published in SPIE Proceedings Vol. 8443:
Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray
Tadayuki Takahashi; Stephen S. Murray; Jan-Willem A. den Herder, Editor(s)

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