Gamma-Ray Spectrometer of high purity germanium detector cooled by the stirling cycle cryostat in the lunar mission SELENE

M. N. Kobayashi, Nobuyuki Hasebe, T. Miyachi, A. Oka, N. Yamashita, E. Shibamura, K. Narasaki, K. Tsurumi, T. Yamamoto, K. Sakai, K. Mori, C. D'Uston, H. Barthe

    研究成果: Conference contribution

    抜粋

    The Gamma Ray Spectrometer (GRS) will be onboard the Japanese lunar polar orbiter SELENE, to be launched in 2004, to obtain the information of element abundance on the entire lunar surface. GRS consists of a high-purity Ge detector as a main detector, which is an n-type Ge crystal with a high detection efficiency of 60 % encapsulated in an aluminum canister. In addition, BGO and plastic scintillators are employed for an anti-coincidence shield and for suppression of Compton photons and energetic ion backgrounds. GRS will be the first gamma ray spectrometer employing a Ge detector for the lunar mission. GRS adopted a Stirling cycle refrigerator, whose cooling capacity is 2.0 W at 80 K. The mechanical vibration from the cryosystem to the Ge detector is effectively reduced by the dual opposed pistons in the compressor and the flexible thermo-coupling link between the two components. An excellent energy resolution of < 3 keV at 1.33 MeV has been achieved in the prototype- model of GRS.

    元の言語English
    ホスト出版物のタイトルIEEE Nuclear Science Symposium and Medical Imaging Conference
    編集者D. Merelli, J. Surget, M. Ulma
    1
    出版物ステータスPublished - 2000
    イベント2000 IEEE Nuclear Science Symposium Conference Record - Lyon
    継続期間: 2000 10 152000 10 20

    Other

    Other2000 IEEE Nuclear Science Symposium Conference Record
    Lyon
    期間00/10/1500/10/20

    ASJC Scopus subject areas

    • Computer Vision and Pattern Recognition
    • Industrial and Manufacturing Engineering

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    Kobayashi, M. N., Hasebe, N., Miyachi, T., Oka, A., Yamashita, N., Shibamura, E., Narasaki, K., Tsurumi, K., Yamamoto, T., Sakai, K., Mori, K., D'Uston, C., & Barthe, H. (2000). Gamma-Ray Spectrometer of high purity germanium detector cooled by the stirling cycle cryostat in the lunar mission SELENE. : D. Merelli, J. Surget, & M. Ulma (版), IEEE Nuclear Science Symposium and Medical Imaging Conference (巻 1)