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 SakanobeHiroyoshi Kato, Shunya Takizawa, Kentaro Uesugi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

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.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume8443
DOIs
Publication statusPublished - 2012
EventSpace Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray - Amsterdam
Duration: 2012 Jul 12012 Jul 6

Other

OtherSpace Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray
CityAmsterdam
Period12/7/112/7/6

Fingerprint

CdTe
Hard X-ray
Imager
Image sensors
Strip
strip
Imaging
Detector
Detectors
Imaging techniques
X rays
detectors
x rays
Synchrotron Radiation
Spatial Dependence
Bias voltage
Synchrotron radiation
Gamma rays
Gamma Rays
Spatial Resolution

Keywords

  • ASTRO-H mission
  • CdTe detector
  • Double-sided strip detector
  • Hard X-ray Imager
  • X-ray/ray astrophysics

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Hagino, K., Odaka, H., Sato, G., Watanabe, S., Takeda, S., Kokubun, M., ... Uesugi, K. (2012). Imaging and spectral performance of cdte double-sided strip detectors for the hard x-ray imager onboard ASTRO-H. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 8443). [844355] https://doi.org/10.1117/12.926052

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

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8443 2012. 844355.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Hagino, K, Odaka, H, Sato, G, Watanabe, S, Takeda, S, Kokubun, M, Fukuyama, T, Saito, S, Sato, T, Ichinohe, Y, Takahashi, T, Nakano, T, Nakazawa, K, Makishima, K, Tajima, H, Tanaka, T, Ishibashi, K, Miyazawa, T, Sakai, M, Sakanobe, K, Kato, H, Takizawa, S & Uesugi, K 2012, Imaging and spectral performance of cdte double-sided strip detectors for the hard x-ray imager onboard ASTRO-H. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 8443, 844355, Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray, Amsterdam, 12/7/1. https://doi.org/10.1117/12.926052
Hagino K, Odaka H, Sato G, Watanabe S, Takeda S, Kokubun M et al. Imaging and spectral performance of cdte double-sided strip detectors for the hard x-ray imager onboard ASTRO-H. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8443. 2012. 844355 https://doi.org/10.1117/12.926052
Hagino, Kouichi ; Odaka, Hirokazu ; Sato, Goro ; Watanabe, Shin ; Takeda, Shin'ichiro ; Kokubun, Motohide ; Fukuyama, Taro ; Saito, Shinya ; Sato, Tamotsu ; Ichinohe, Yuto ; Takahashi, Tadayuki ; Nakano, Toshio ; Nakazawa, Kazuhiro ; Makishima, Kazuo ; Tajima, Hiroyasu ; Tanaka, Takaaki ; Ishibashi, Kazunori ; Miyazawa, Takuya ; Sakai, Michito ; Sakanobe, Karin ; Kato, Hiroyoshi ; Takizawa, Shunya ; Uesugi, Kentaro. / Imaging and spectral performance of cdte double-sided strip detectors for the hard x-ray imager onboard ASTRO-H. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8443 2012.
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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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AU - Kokubun, Motohide

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AU - Saito, Shinya

AU - Sato, Tamotsu

AU - Ichinohe, Yuto

AU - Takahashi, Tadayuki

AU - Nakano, Toshio

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AU - Ishibashi, Kazunori

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AU - Sakai, Michito

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AB - 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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