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

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

    1 Citation (Scopus)

    Abstract

    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.

    Original languageEnglish
    Title of host publicationProceedings of the 30th International Cosmic Ray Conference, ICRC 2007
    PublisherUniversidad Nacional Autonoma de Mexico
    Pages425-428
    Number of pages4
    Volume2
    EditionOG PART 1
    Publication statusPublished - 2007
    Event30th International Cosmic Ray Conference, ICRC 2007 - Merida, Yucatan, Mexico
    Duration: 2007 Jul 32007 Jul 11

    Other

    Other30th International Cosmic Ray Conference, ICRC 2007
    CountryMexico
    CityMerida, Yucatan
    Period07/7/307/7/11

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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  • Cite this

    Kodaira, S., Doke, T., Hareyama, M., Hasebe, N., Ota, S., Sakurai, K., Sato, M., Yasuda, N., Nakamura, S., Kamei, T., Tawara, H., & Ogura, K. (2007). Development of high resolution solid-state track detector for ultra heavy cosmic ray observation. In Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007 (OG PART 1 ed., Vol. 2, pp. 425-428). Universidad Nacional Autonoma de Mexico.