Development of the GRB Monitor for the CALET experiment

Kazutaka Yamaoka*, Atsumasa Yoshida, Taro Kotani, Satoshi Nakahira, Kei Suzuki, Takuya Ohyama, Takaaki Doshida, Tohru Kojima, Takayuki Shiraki, Tomoki Kataoka, Yujin E. Nakagawa, Hiroshi Tomida, Shoji Torii

*Corresponding author for this work

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

    2 Citations (Scopus)


    The CALET mission is a Japanese-led effort involving candidate experiments on the International Space Station, planned for launch in 2013. The CALET main detector is a pair conversion telescope which is dedicated to observing high energy electrons and gamma-rays in the GeV-TeV range. CALET can observe gamma-ray bursts over an unprecedented 9 decade energy range from ∼keV to ∼TeV with a combination of a gamma-ray burst monitor (GBM) with low energy coverage. GBM is now designed as multiple scintillators made of BGO and LaBr3 (Ce) scintillators. The prototype LaBr3(Ce) crystal with 3 inch diameter and 0.5 inch thickness displays a very good performance: 2.9±0.1 % FWHM energy resolution at 662 keV and 4 keV lower energy threshold. Furthermore, degradations in performance by the anticipated proton irradiation in the orbit are not significant. Results on proton-induced background are also presented.

    Original languageEnglish
    Title of host publicationAIP Conference Proceedings
    Number of pages3
    Publication statusPublished - 2009
    Event6th Huntsville Symposium on Gamma-Ray Bursts - Huntsville, AL
    Duration: 2008 Oct 202008 Oct 23


    Other6th Huntsville Symposium on Gamma-Ray Bursts
    CityHuntsville, AL


    • γ-ray bursts
    • γ-ray sources
    • CALET
    • X- and γ-ray telescopes and instrumentation

    ASJC Scopus subject areas

    • Physics and Astronomy(all)


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