Development of high resolution solid-state track detector for ultra heavy cosmic ray observation

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

    研究成果: Conference contribution

    1 被引用数 (Scopus)

    抄録

    The observation of trans-iron nuclei in galactic cosmic rays (Z 30) requires a high performance cosmic ray detector telescope with a very large exposure area because of their extremely low fluxes. It is realized by the use of solid-state track detector of CR-39, which has an advantage of easy extension of exposure area. The verification of mass and nuclear charge identifications with the CR-39 detector newly developed for the observation of heavy cosmic ray particles has been made using Fe ions from NIRS-HIMAC. Mass and charge resolutions for Fe nuclei are found to be 0.22 amu and 0.22 cu in rms, respectively. Moreover, it is necessary to raise the Z/detection threshold in order to suppress background tracks produced by galactic cosmic rays with Z/<30. The new track detectors of copolymers of CR-39 and DAP (diallyl phthalate) have been developed and verified as for their performances. It was found that the newly CR-39 detector has a capability to observe trans-iron nuclei in galactic cosmic rays.

    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425-428
    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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