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Proceedings Paper

Imaging and spectral performance of CdTe double-sided strip detectors for the hard x-ray imager onboard ASTRO-H
Author(s): Kouichi Hagino; Hirokazu Odaka; Goro Sato; Shin Watanabe; Shin'ichiro Takeda; Motohide Kokubun; Taro Fukuyama; Shinya Saito; Tamotsu Sato; Yuto Ichinohe; Tadayuki Takahashi; Toshio Nakano; Kazuhiro Nakazawa; Kazuo Makishima; Hiroyasu Tajima; Takaaki Tanaka; Kazunori Ishibashi; Takuya Miyazawa; Michito Sakai; Karin Sakanobe; Hiroyoshi Kato; Shunya Takizawa; Kentaro Uesugi
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Paper Abstract

The imaging and spectral performance of CdTe double-sided strip detectors (CdTe-DSDs) was evaluated for the ASTRO-H mission. The charcterized CdTe-DSDs have a strip pitch of 0.25 mm, an imaging area of 3.2 cm × 3.2 cm and a thickness of 0.75 mm. The detector was successfully operated at a temperature of -20°C and with an applied bias voltage of 250 V. By using two-strip events as well as one-strip events for the event reconstruction, a good energy resolution of 2.0 keV at 59.5 keV and a sub-strip spatial resolution was achieved. The hard X-ray and gamma-ray response of CdTe-DSDs is complex due to the properties of CdTe and the small pixel effect. Therefore, one of the issues to investigate is the response of the CdTe-DSD. In order to investigate the spatial dependence of the detector response, we performed fine beam scan experiments at SPring-8, a synchrotron radiation facility. From these experiments, the depth structure of the electric field was determined as well as properties of carriers in the detector and successfully reproduced the experimental data with simulated spectra.

Paper Details

Date Published: 17 September 2012
PDF: 11 pages
Proc. SPIE 8443, Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray, 844355 (17 September 2012); doi: 10.1117/12.926052
Show Author Affiliations
Kouichi Hagino, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Univ. of Tokyo (Japan)
Hirokazu Odaka, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Goro Sato, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Shin Watanabe, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Univ. of Tokyo (Japan)
Shin'ichiro Takeda, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Motohide Kokubun, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Taro Fukuyama, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Univ. of Tokyo (Japan)
Shinya Saito, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Univ. of Tokyo (Japan)
Tamotsu Sato, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Univ. of Tokyo (Japan)
Yuto Ichinohe, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Univ. of Tokyo (Japan)
Tadayuki Takahashi, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Univ. of Tokyo (Japan)
Toshio Nakano, The Univ. of Tokyo (Japan)
Kazuhiro Nakazawa, The Univ. of Tokyo (Japan)
Kazuo Makishima, The Univ. of Tokyo (Japan)
Hiroyasu Tajima, Nagoya Univ. (Japan)
Takaaki Tanaka, Kyoto Univ. (Japan)
Kazunori Ishibashi, Nagoya Univ. (Japan)
Takuya Miyazawa, Nagoya Univ. (Japan)
Michito Sakai, Nagoya Univ. (Japan)
Karin Sakanobe, Nagoya Univ. (Japan)
Hiroyoshi Kato, Nagoya Univ. (Japan)
Shunya Takizawa, Nagoya Univ. (Japan)
Kentaro Uesugi, Japan Synchrotron Radiation Research Institute (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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