Development of wide-band X-ray/gamma-ray imagers using reach through APD arrays

T. Nakamori*, J. Kataoka, T. Toizumi, M. Koizumi, S. Tanaka, Y. Kanai, Y. Yatsu, N. Kawai, Y. Ishikawa, T. Kawai, N. Kawabata, Y. Matsunaga

*Corresponding author for this work

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


It is quite important to obtain wide band spectra of gamma-ray bursts (GRBs) at the same time in order to probe the emission processes or the structure of GRBs. 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 back-illuminated reach-through APD (5×5mm2) 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 to be used in future GRB missions. Here we present the current status and performance of our hybrid detector.

Original languageEnglish
Title of host publicationGamma-Ray Burst - 6th Huntsville Symposium
Number of pages3
Publication statusPublished - 2009
Externally publishedYes
Event6th Huntsville Symposium on Gamma-Ray Bursts - Huntsville, AL, United States
Duration: 2008 Oct 202008 Oct 23

Publication series

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


Conference6th Huntsville Symposium on Gamma-Ray Bursts
Country/TerritoryUnited States
CityHuntsville, AL


  • Instrumentation: detectors
  • Photometers
  • Spectropraphs

ASJC Scopus subject areas

  • General Physics and Astronomy


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