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

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

    Abstract

    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.

    Original languageEnglish
    Title of host publicationIEEE Nuclear Science Symposium and Medical Imaging Conference
    EditorsD. Merelli, J. Surget, M. Ulma
    Volume1
    Publication statusPublished - 2000
    Event2000 IEEE Nuclear Science Symposium Conference Record - Lyon
    Duration: 2000 Oct 152000 Oct 20

    Other

    Other2000 IEEE Nuclear Science Symposium Conference Record
    CityLyon
    Period00/10/1500/10/20

    ASJC Scopus subject areas

    • Computer Vision and Pattern Recognition
    • Industrial and Manufacturing Engineering

    Fingerprint Dive into the research topics of 'Gamma-Ray Spectrometer of high purity germanium detector cooled by the stirling cycle cryostat in the lunar mission SELENE'. Together they form a unique fingerprint.

  • Cite this

    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. In D. Merelli, J. Surget, & M. Ulma (Eds.), IEEE Nuclear Science Symposium and Medical Imaging Conference (Vol. 1)