Development of X-ray/gamma-ray imaging spectrometer with reach-through APD arrays

T. Nakamori*, T. Enomoto, T. Toizumi, Y. Yatsu, N. Kawai, J. Kataoka, Y. Ishikawa, T. Kawai, N. Kawabata, Y. Matsunaga

*Corresponding author for this work

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

2 Citations (Scopus)


It is quite important to obtain wide band spectra of high energy astrophysical phenomena at the same time in order to probe emission processes or structures. Especially observations of transient objects, such as gamma-ray bursts, expect detectors with wide energy band coverage for the sake of an efficient spectroscopy within limited time windows. An avalanche photo diode (APD) is a compact photon sensor with an internal gain of ∼100. We have developed an X-ray/gamma-ray detector using a reach-through APD (5 × 5 mm2) optically coupled with a conventional CsI(Tl) scintillator, which covers typically from 1 keV to 1 MeV. Further, we developed a 1-dimensional array of the 8/16 APDs (net 16 × 20) mm2) for the purpose of an imaging photon detector combined with coded masks, to be applied in future missions. We present the current status and performances of our hybrid detector using the 8-channel array.

Original languageEnglish
Title of host publicationDeciphering the Ancient Universe with Gamma-Ray Bursts
Number of pages3
Publication statusPublished - 2010 Dec 13
EventInternational Symposium "Deciphering the Ancient Universe with Gamma-Ray Bursts" - Kyoto, Japan
Duration: 2010 Apr 192010 Apr 23

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


ConferenceInternational Symposium "Deciphering the Ancient Universe with Gamma-Ray Bursts"


  • Instrumentation: Detectors
  • Photometers
  • Spectropraphs

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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