He and Ne isotopes in radiation belts observed by HIT onboard TSUBASA Satellite

M. Hareyama, M. Asaeda, M. Fujii, Nobuyuki Hasebe, N. Kajiwara, S. Kodaira, K. Sakurai, T. Goka, H. Koshiishi, H. Matsumoto

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

    2 Citations (Scopus)

    Abstract

    The energetic heavy ions from helium to iron were observed by Heavy Ion Telescope (HIT) onboard the TSUBASA satellite from March, 2002 to September, 2003 in the geostationary transfer orbit. Their isotopes were also separated that the mass resolution is ∼0.24 amu for helium isotopes and ∼0.35 amu for neon isotopes. 3He and 4He for helium with 20 - 40 MeV/n and 20 Ne and 22 Ne for neon with 50 - 100 MeV/n in the quiet periods were analyzed to obtain the spatial and temporal variation of fluxes of both isotopes. The enhancement of 3 He flux as compared with 4 He one in the region than 2L was found, while no neon isotopes were observed in the same region. Moreover, the ratios of 3He/ 4He and 22 Ne/ 20 Ne in the region than 3 L are comparable to those of galactic cosmic rays. These results might suggest that the injection and loss mechanism of heavy ions differ between inner and outer radiation belts.

    Original languageEnglish
    Title of host publication29th International Cosmic Ray Conference, ICRC 2005
    PublisherTata Institute of Fundamental Research
    Pages121-124
    Number of pages4
    Volume2
    Publication statusPublished - 2005
    Event29th International Cosmic Ray Conference, ICRC 2005 - Pune
    Duration: 2005 Aug 32005 Aug 10

    Other

    Other29th International Cosmic Ray Conference, ICRC 2005
    CityPune
    Period05/8/305/8/10

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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  • Cite this

    Hareyama, M., Asaeda, M., Fujii, M., Hasebe, N., Kajiwara, N., Kodaira, S., Sakurai, K., Goka, T., Koshiishi, H., & Matsumoto, H. (2005). He and Ne isotopes in radiation belts observed by HIT onboard TSUBASA Satellite. In 29th International Cosmic Ray Conference, ICRC 2005 (Vol. 2, pp. 121-124). Tata Institute of Fundamental Research.