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17 September 2012 Imaging and spectral performance of CdTe double-sided strip detectors for the hard x-ray imager onboard ASTRO-H
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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Proceedings Volume 8443, Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray; 844355 (2012) https://doi.org/10.1117/12.926052
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands
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.
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Kouichi Hagino, Kouichi Hagino, Hirokazu Odaka, Hirokazu Odaka, Goro Sato, Goro Sato, Shin Watanabe, Shin Watanabe, Shin'ichiro Takeda, Shin'ichiro Takeda, Motohide Kokubun, Motohide Kokubun, Taro Fukuyama, Taro Fukuyama, Shinya Saito, Shinya Saito, Tamotsu Sato, Tamotsu Sato, Yuto Ichinohe, Yuto Ichinohe, Tadayuki Takahashi, Tadayuki Takahashi, Toshio Nakano, Toshio Nakano, Kazuhiro Nakazawa, Kazuhiro Nakazawa, Kazuo Makishima, Kazuo Makishima, Hiroyasu Tajima, Hiroyasu Tajima, Takaaki Tanaka, Takaaki Tanaka, Kazunori Ishibashi, Kazunori Ishibashi, Takuya Miyazawa, Takuya Miyazawa, Michito Sakai, Michito Sakai, Karin Sakanobe, Karin Sakanobe, Hiroyoshi Kato, Hiroyoshi Kato, Shunya Takizawa, Shunya Takizawa, Kentaro Uesugi, Kentaro Uesugi, "Imaging and spectral performance of CdTe double-sided strip detectors for the hard x-ray imager onboard ASTRO-H", Proc. SPIE 8443, Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray, 844355 (17 September 2012); doi: 10.1117/12.926052; https://doi.org/10.1117/12.926052
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