High performance measurement system of large area solid-state track detector array for ultra heavy cosmic rays

S. Kodaira, T. Doke, M. Hareyama, Nobuyuki Hasebe, K. Sakurai, S. Ota, M. Sato, N. Yasuda, S. Nakamura, T. Kamei, H. Tawara, K. Ogura

    研究成果: Conference contribution

    抄録

    In the handling of solid-state track detector (SSTD), a long period and many human powers has been historically required for a long period and many human powers to scan and analyze etch pits produced on the detector. Because a large area greater than a few m2 detector is required to observe ultra heavy nuclei in galactic cosmic rays, a high speed scanning system is practically important to realize the analysis of our observation data. The apparatus to locate quickly the position of UH event produced in the large SSTD using optical methods was developed, and it allows us effectively to trace incident particle trajectory in cosmic ray detector telescope. We have developed the fast automated digital imaging optical microscope (HSP-1000) to scan and analyze the etch pit produced on the detector, whose image acquisition speed is 50-100 times faster than conventional microscope system. Furthermore, analyzing massive cosmic ray track data produced in extremely large exposed area requires a completely automated multi-sample scanning system. The developed automated system consists of a modified HSP-1000 microscope for image acquisition, a robot arm to replace the sample trays, a magazine station for storing sample trays, and a scanning and analyzing computer to control the whole system. Moreover, since the thickness measurement accuracy in local area of SSTD was improved to achieve high charge and mass resolutions, the new system has been developed to measure the SSTD thickness located adjacent to etch pit in SSTD with an excellent resolution of ± 0.2 m.

    本文言語English
    ホスト出版物のタイトルProceedings of the 30th International Cosmic Ray Conference, ICRC 2007
    出版社Universidad Nacional Autonoma de Mexico
    ページ429-432
    ページ数4
    2
    OG PART 1
    出版ステータスPublished - 2007
    イベント30th International Cosmic Ray Conference, ICRC 2007 - Merida, Yucatan, Mexico
    継続期間: 2007 7月 32007 7月 11

    Other

    Other30th International Cosmic Ray Conference, ICRC 2007
    国/地域Mexico
    CityMerida, Yucatan
    Period07/7/307/7/11

    ASJC Scopus subject areas

    • 核物理学および高エネルギー物理学

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