Development of signal processing system of avalanche photo diode for space observations by Astro-H

M. Ohno, K. Goto, Y. Hanabata, H. Takahashi, Y. Fukazawa, M. Yoshino, T. Saito, T. Nakamori, Jun Kataoka, M. Sasano, S. Torii, H. Uchiyama, K. Nakazawa, S. Watanabe, M. Kokubun, M. Ohta, T. Sato, T. Takahashi, H. Tajima

    研究成果: Article

    2 引用 (Scopus)

    抄録

    Astro-H is the sixth Japanese X-ray space observatory which will be launched in 2014. Two of onboard instruments of Astro-H, Hard X-ray Imager and Soft Gamma-ray Detector are surrounded by many number of large Bismuth Germanate (Bi4Ge3O12; BGO) scintillators. Optimum readout system of scintillation lights from these BGOs are essential to reduce the background signals and achieve high performance for main detectors because most of gamma-rays from out of field-of-view of main detectors or radio-isotopes produced inside them due to activation can be eliminated by anti-coincidence technique using BGO signals. We apply Avalanche Photo Diode (APD) for light sensor of these BGO detectors since their compactness and high quantum efficiency make it easy to design such large number of BGO detector system. For signal processing from APDs, digital filter and other trigger logics on the Field-Programmable Gate Array (FPGA) is used instead of discrete analog circuits due to limitation of circuit implementation area on spacecraft. For efficient observations, we have to achieve as low threshold of anti-coincidence signal as possible by utilizing the digital filtering. In addition, such anti-coincident signals should be sent to the main detector within 5μs to make it in time to veto the A-D conversion. Considering this requirement and constraint from logic size of FPGA, we adopt two types of filter, 8 delay taps filter with only 2 bit precision coefficient and 16 delay taps filter with 8 bit precision coefficient. The data after former simple filter provides anti-coincidence signal quickly in orbit, and the latter filter is used for detail analysis after the data is down-linked.

    元の言語English
    ページ(範囲)112-115
    ページ数4
    ジャーナルNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
    699
    DOI
    出版物ステータスPublished - 2013 1 21

    Fingerprint

    avalanches
    signal processing
    Signal processing
    Diodes
    diodes
    Detectors
    detectors
    filters
    field-programmable gate arrays
    taps
    Gamma rays
    logic
    Field programmable gate arrays (FPGA)
    gamma rays
    Readout systems
    X rays
    analog circuits
    digital filters
    Analog circuits
    Scintillation

    ASJC Scopus subject areas

    • Instrumentation
    • Nuclear and High Energy Physics

    これを引用

    Development of signal processing system of avalanche photo diode for space observations by Astro-H. / Ohno, M.; Goto, K.; Hanabata, Y.; Takahashi, H.; Fukazawa, Y.; Yoshino, M.; Saito, T.; Nakamori, T.; Kataoka, Jun; Sasano, M.; Torii, S.; Uchiyama, H.; Nakazawa, K.; Watanabe, S.; Kokubun, M.; Ohta, M.; Sato, T.; Takahashi, T.; Tajima, H.

    :: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 巻 699, 21.01.2013, p. 112-115.

    研究成果: Article

    Ohno, M, Goto, K, Hanabata, Y, Takahashi, H, Fukazawa, Y, Yoshino, M, Saito, T, Nakamori, T, Kataoka, J, Sasano, M, Torii, S, Uchiyama, H, Nakazawa, K, Watanabe, S, Kokubun, M, Ohta, M, Sato, T, Takahashi, T & Tajima, H 2013, 'Development of signal processing system of avalanche photo diode for space observations by Astro-H', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 巻. 699, pp. 112-115. https://doi.org/10.1016/j.nima.2012.03.022
    Ohno, M. ; Goto, K. ; Hanabata, Y. ; Takahashi, H. ; Fukazawa, Y. ; Yoshino, M. ; Saito, T. ; Nakamori, T. ; Kataoka, Jun ; Sasano, M. ; Torii, S. ; Uchiyama, H. ; Nakazawa, K. ; Watanabe, S. ; Kokubun, M. ; Ohta, M. ; Sato, T. ; Takahashi, T. ; Tajima, H. / Development of signal processing system of avalanche photo diode for space observations by Astro-H. :: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2013 ; 巻 699. pp. 112-115.
    @article{bc8ba892735d4f63bb665edff5da2ffa,
    title = "Development of signal processing system of avalanche photo diode for space observations by Astro-H",
    abstract = "Astro-H is the sixth Japanese X-ray space observatory which will be launched in 2014. Two of onboard instruments of Astro-H, Hard X-ray Imager and Soft Gamma-ray Detector are surrounded by many number of large Bismuth Germanate (Bi4Ge3O12; BGO) scintillators. Optimum readout system of scintillation lights from these BGOs are essential to reduce the background signals and achieve high performance for main detectors because most of gamma-rays from out of field-of-view of main detectors or radio-isotopes produced inside them due to activation can be eliminated by anti-coincidence technique using BGO signals. We apply Avalanche Photo Diode (APD) for light sensor of these BGO detectors since their compactness and high quantum efficiency make it easy to design such large number of BGO detector system. For signal processing from APDs, digital filter and other trigger logics on the Field-Programmable Gate Array (FPGA) is used instead of discrete analog circuits due to limitation of circuit implementation area on spacecraft. For efficient observations, we have to achieve as low threshold of anti-coincidence signal as possible by utilizing the digital filtering. In addition, such anti-coincident signals should be sent to the main detector within 5μs to make it in time to veto the A-D conversion. Considering this requirement and constraint from logic size of FPGA, we adopt two types of filter, 8 delay taps filter with only 2 bit precision coefficient and 16 delay taps filter with 8 bit precision coefficient. The data after former simple filter provides anti-coincidence signal quickly in orbit, and the latter filter is used for detail analysis after the data is down-linked.",
    keywords = "Astro-H, Gamma-rays, Observations",
    author = "M. Ohno and K. Goto and Y. Hanabata and H. Takahashi and Y. Fukazawa and M. Yoshino and T. Saito and T. Nakamori and Jun Kataoka and M. Sasano and S. Torii and H. Uchiyama and K. Nakazawa and S. Watanabe and M. Kokubun and M. Ohta and T. Sato and T. Takahashi and H. Tajima",
    year = "2013",
    month = "1",
    day = "21",
    doi = "10.1016/j.nima.2012.03.022",
    language = "English",
    volume = "699",
    pages = "112--115",
    journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",
    issn = "0168-9002",
    publisher = "Elsevier",

    }

    TY - JOUR

    T1 - Development of signal processing system of avalanche photo diode for space observations by Astro-H

    AU - Ohno, M.

    AU - Goto, K.

    AU - Hanabata, Y.

    AU - Takahashi, H.

    AU - Fukazawa, Y.

    AU - Yoshino, M.

    AU - Saito, T.

    AU - Nakamori, T.

    AU - Kataoka, Jun

    AU - Sasano, M.

    AU - Torii, S.

    AU - Uchiyama, H.

    AU - Nakazawa, K.

    AU - Watanabe, S.

    AU - Kokubun, M.

    AU - Ohta, M.

    AU - Sato, T.

    AU - Takahashi, T.

    AU - Tajima, H.

    PY - 2013/1/21

    Y1 - 2013/1/21

    N2 - Astro-H is the sixth Japanese X-ray space observatory which will be launched in 2014. Two of onboard instruments of Astro-H, Hard X-ray Imager and Soft Gamma-ray Detector are surrounded by many number of large Bismuth Germanate (Bi4Ge3O12; BGO) scintillators. Optimum readout system of scintillation lights from these BGOs are essential to reduce the background signals and achieve high performance for main detectors because most of gamma-rays from out of field-of-view of main detectors or radio-isotopes produced inside them due to activation can be eliminated by anti-coincidence technique using BGO signals. We apply Avalanche Photo Diode (APD) for light sensor of these BGO detectors since their compactness and high quantum efficiency make it easy to design such large number of BGO detector system. For signal processing from APDs, digital filter and other trigger logics on the Field-Programmable Gate Array (FPGA) is used instead of discrete analog circuits due to limitation of circuit implementation area on spacecraft. For efficient observations, we have to achieve as low threshold of anti-coincidence signal as possible by utilizing the digital filtering. In addition, such anti-coincident signals should be sent to the main detector within 5μs to make it in time to veto the A-D conversion. Considering this requirement and constraint from logic size of FPGA, we adopt two types of filter, 8 delay taps filter with only 2 bit precision coefficient and 16 delay taps filter with 8 bit precision coefficient. The data after former simple filter provides anti-coincidence signal quickly in orbit, and the latter filter is used for detail analysis after the data is down-linked.

    AB - Astro-H is the sixth Japanese X-ray space observatory which will be launched in 2014. Two of onboard instruments of Astro-H, Hard X-ray Imager and Soft Gamma-ray Detector are surrounded by many number of large Bismuth Germanate (Bi4Ge3O12; BGO) scintillators. Optimum readout system of scintillation lights from these BGOs are essential to reduce the background signals and achieve high performance for main detectors because most of gamma-rays from out of field-of-view of main detectors or radio-isotopes produced inside them due to activation can be eliminated by anti-coincidence technique using BGO signals. We apply Avalanche Photo Diode (APD) for light sensor of these BGO detectors since their compactness and high quantum efficiency make it easy to design such large number of BGO detector system. For signal processing from APDs, digital filter and other trigger logics on the Field-Programmable Gate Array (FPGA) is used instead of discrete analog circuits due to limitation of circuit implementation area on spacecraft. For efficient observations, we have to achieve as low threshold of anti-coincidence signal as possible by utilizing the digital filtering. In addition, such anti-coincident signals should be sent to the main detector within 5μs to make it in time to veto the A-D conversion. Considering this requirement and constraint from logic size of FPGA, we adopt two types of filter, 8 delay taps filter with only 2 bit precision coefficient and 16 delay taps filter with 8 bit precision coefficient. The data after former simple filter provides anti-coincidence signal quickly in orbit, and the latter filter is used for detail analysis after the data is down-linked.

    KW - Astro-H

    KW - Gamma-rays

    KW - Observations

    UR - http://www.scopus.com/inward/record.url?scp=84870422483&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84870422483&partnerID=8YFLogxK

    U2 - 10.1016/j.nima.2012.03.022

    DO - 10.1016/j.nima.2012.03.022

    M3 - Article

    VL - 699

    SP - 112

    EP - 115

    JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

    JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

    SN - 0168-9002

    ER -