Hard X-ray Imager (HXI) for the ASTRO-H mission

Motohide Kokubun*, Kazuhiro Nakazawa, Teruaki Enoto, Yasushi Fukazawa, Kirk Gilmore, Jun Kataoka, Madoka Kawaharada, Philippe Laurent, Francois Lebrun, Olivier Limousin, Kazuo Makishima, Tsunefumi Mizuno, Kunishiro Mori, Takeshi Nakamori, Masanori Ohno, Masayuki Ohta, Goro Sato, Hiroyasu Tajima, Hiromitsu Takahashi, Tadayuki TakahashiTakaaki Tanaka, Yukikatsu Terada, Hideki Uchiyama, Yasunobu Uchiyama, Shin Watanabe, Yoichi Yatsu, Kazutaka Yamaoka

*Corresponding author for this work

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

38 Citations (Scopus)


The Hard X-ray Imager (HXI) is one of four detectors on board the ASTRO-H mission (6th Japanese X-ray satellite), which is scheduled to be launched in 2014. Using the hybrid structure composed of double-sided silicon strip detectors and a cadmium telluride double-sided strip detector, the instrument fully covers the energy range of photons collected with the hard X-ray telescope up to 80 keV with a high quantum efficiency. High spatial resolution of 250 μm and an energy resolution of 1-2 keV (FWHM) are both achieved with low noise front-end ASICs. In addition, the thick BGO active shields surrounding the main detector package is a heritage of the successful performance of the Hard X-ray Detector on board the Suzaku satellite. This feature enables the instrument to achieve an extremely high background reduction caused by cosmic-ray particles, cosmic X-ray background, and in-orbit radiation activation. In this paper, we present the detector concept, design, latest results of the detector development, and the current status of the hardware.

Original languageEnglish
Title of host publicationSpace Telescopes and Instrumentation 2010
Subtitle of host publicationUltraviolet to Gamma Ray
Publication statusPublished - 2010
EventSpace Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray - San Diego, CA, United States
Duration: 2010 Jun 282010 Jul 2

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferenceSpace Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray
Country/TerritoryUnited States
CitySan Diego, CA


  • ASTRO-H mission
  • Hard X-ray Imager
  • X-ray Astronomy

ASJC Scopus subject areas

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


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