Development of a scintillation detector using a MPPC as an alternative to an APD

T. Miura, T. Nakamori, Jun Kataoka, T. Kato, K. Sato, Y. Ishikawa, K. Yamamura, N. Kawabata

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    We conducted a study to examine the performance of the multi-pixel photon counter(MPPC). The MPPC is a novel type of semiconductor photodetector consisting of multiple avalanche photodiode (APD) pixels operated in Geiger mode. Whereas the MPPC offers a great advantage in signal multiplication comparable to that achieved by the photomultiplier tube (PMT), the detection of weak scintillation light signals is difficult due to the severe contamination of dark counts. In this study, we first compared the energy resolutions and energy thresholds of a 3 × 3 mm2 MPPC with those of a 3 × 3 mm2 APD as scintillation detectors. The MPPC and APD were optically coupled with 5 × 5 × 5 mm3 scintillation crystals of BGO, Tl:CsI, Pr:LuAG, and YAG. It turned out that the APD had better energy resolutions for 662 keV gamma-rays, while the MPPC had lower energy thresholds as measured using a test pulse. Despite the low energy thresholds, it is difficult for the MPPC to detect low energy gamma-rays due to the contamination of dark counts. Secondly, we applied a coincidence technique to discriminate weak gamma-ray signals from dark counts by using scintillation detectors that consisted of a 2 × 2 MPPC-array optically coupled with 10 × 10 × 10 mm3 crystals of GSO, BGO, and Pr:LuAG. With this technique, we demonstrated that dark counts achieved a rejection efficiency of more than 99.8%. As a result, 22.2 keV gamma-rays were successfully detected with a GSO scintillator as measured at +20°C.

    Original languageEnglish
    Article numberC02036
    JournalJournal of Instrumentation
    Volume7
    Issue number2
    DOIs
    Publication statusPublished - 2012 Feb

    Fingerprint

    Avalanche Photodiode
    Scintillation counters
    Avalanche photodiodes
    Scintillation
    avalanches
    scintillation
    photodiodes
    Photon
    counters
    Photons
    Pixel
    Pixels
    pixels
    Detector
    Alternatives
    detectors
    photons
    Gamma Rays
    Gamma rays
    Count

    Keywords

    • Gamma telescopes
    • X-ray detectors

    ASJC Scopus subject areas

    • Instrumentation
    • Mathematical Physics

    Cite this

    Development of a scintillation detector using a MPPC as an alternative to an APD. / Miura, T.; Nakamori, T.; Kataoka, Jun; Kato, T.; Sato, K.; Ishikawa, Y.; Yamamura, K.; Kawabata, N.

    In: Journal of Instrumentation, Vol. 7, No. 2, C02036, 02.2012.

    Research output: Contribution to journalArticle

    Miura, T, Nakamori, T, Kataoka, J, Kato, T, Sato, K, Ishikawa, Y, Yamamura, K & Kawabata, N 2012, 'Development of a scintillation detector using a MPPC as an alternative to an APD', Journal of Instrumentation, vol. 7, no. 2, C02036. https://doi.org/10.1088/1748-0221/7/02/C02036
    Miura, T. ; Nakamori, T. ; Kataoka, Jun ; Kato, T. ; Sato, K. ; Ishikawa, Y. ; Yamamura, K. ; Kawabata, N. / Development of a scintillation detector using a MPPC as an alternative to an APD. In: Journal of Instrumentation. 2012 ; Vol. 7, No. 2.
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