Development of the hard X-ray detector for the ASTRO-E mission

T. Takahashi, H. Ezawa, Y. Fukazawa, M. Hirayama, E. Idesawa, H. Ikeda, Y. Ishisaki, N. Lyomoto, T. Kamae, J. Kataoka, H. Kaneda, H. Kubo, K. Makishima, K. Matsushita, K. Matsuzaki, T. Mizuno, T. Murakami, K. Nagata, S. Nakamae, M. NomachiH. Obayashi, T. Ohtsuka, H. Ozawa, Y. Saito, M. Sugizaki, T. Tamura, M. Tashiro, N. Tsuchida, K. Tsukada, A. Yoshida

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


The Hard X-ray Detector (HXD) is one of three instruments on the fifth Japanese X-ray astronomy satellite, ASTRO-E, scheduled for launch in 2000. The HXD consists of a 4x4 = 16 modular assembly of identical counters, each consisting of a combination of YAP(or GSO)/BGO well-type phoswich counters and silicon PIN diodes. The field of view of the detector for high energy photons is restricted to 4° x 4° by active collimators made of BGO and the fov for low energy photons is restricted to 0.5° x 0.5° by the fine passive collimators made of phosphor bronze. The detector is characterized by a low background reaching severalxlO~6c/s/cm2/keV. Combined with the other two instruments for soft X-ray observations (0.5-12 keV), the ASTRO-E mission will cover the entire range of soft and hard X-rays with the highest sensitivity ever achieved. Furthermore, thick BGO counters which surround the 4x4 matrix of well-type phoswich counters act as a 7-ray burst detector in the energy band of 100-2000 keV.

Original languageEnglish
Pages (from-to)645-648
Number of pages4
JournalAstronomy and Astrophysics Supplement Series
Issue number4
Publication statusPublished - 1996 Dec 1
Externally publishedYes


  • Gamma-ray
  • Instrumentation: Detectors telescopes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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