Observation of galactic cosmic ray particles by the HEP-HI telescope on the GEOTAIL satellite

T. Doke, Nobuyuki Hasebe, T. Hayashi, K. Itsumi, J. Kikuchi, M. N. Kobayashi, K. Kondoh, H. Shirai, T. Takashima, T. Takehana, Y. Yamada, T. Yanagimachi, J. Yashiro

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    The energy spectra (40 to 300 MeV/n) of galactic cosmic ray particles (C, N, O, Ne, Mg, Si, and Fe) observed by the HEP-HI silicon detector telescope onboard the GEOTAIL satellite were investigated over the period from January 1993 to May 1996, from the viewpoint of solar modulation. From the GEOTAIL data and those of relativistic heavy particles observed by HEAO-3, the modulation potential φ was obtained by using a solution of the Fokker-Plank equation with the "force-field" approximation. In the equation the diffusion coefficient was used as adjustable parameter, under the assumptions of a fixed velocity of solar wind (400km/sec) and the radius of the heliosphere of 50AU. The time variation of the modulation potential thus obtained is compared with that obtained from the CLIMAX neutron monitor. A reasonable correlation between both time variations is found when five months delay is applied to the results obtained by the HEP-HI telescope.

    Original languageEnglish
    Pages (from-to)487-490
    Number of pages4
    JournalAdvances in Space Research
    Volume23
    Issue number3
    Publication statusPublished - 1999

    Fingerprint

    Cosmic rays
    Telescopes
    cosmic ray
    Modulation
    Satellites
    telescopes
    modulation
    HEAO 3
    silicon
    solar wind
    Silicon detectors
    Solar wind
    heliosphere
    field theory (physics)
    monitors
    Neutrons
    energy spectra
    diffusion coefficient
    energy
    neutrons

    ASJC Scopus subject areas

    • Space and Planetary Science
    • Astronomy and Astrophysics

    Cite this

    Doke, T., Hasebe, N., Hayashi, T., Itsumi, K., Kikuchi, J., Kobayashi, M. N., ... Yashiro, J. (1999). Observation of galactic cosmic ray particles by the HEP-HI telescope on the GEOTAIL satellite. Advances in Space Research, 23(3), 487-490.

    Observation of galactic cosmic ray particles by the HEP-HI telescope on the GEOTAIL satellite. / Doke, T.; Hasebe, Nobuyuki; Hayashi, T.; Itsumi, K.; Kikuchi, J.; Kobayashi, M. N.; Kondoh, K.; Shirai, H.; Takashima, T.; Takehana, T.; Yamada, Y.; Yanagimachi, T.; Yashiro, J.

    In: Advances in Space Research, Vol. 23, No. 3, 1999, p. 487-490.

    Research output: Contribution to journalArticle

    Doke, T, Hasebe, N, Hayashi, T, Itsumi, K, Kikuchi, J, Kobayashi, MN, Kondoh, K, Shirai, H, Takashima, T, Takehana, T, Yamada, Y, Yanagimachi, T & Yashiro, J 1999, 'Observation of galactic cosmic ray particles by the HEP-HI telescope on the GEOTAIL satellite', Advances in Space Research, vol. 23, no. 3, pp. 487-490.
    Doke T, Hasebe N, Hayashi T, Itsumi K, Kikuchi J, Kobayashi MN et al. Observation of galactic cosmic ray particles by the HEP-HI telescope on the GEOTAIL satellite. Advances in Space Research. 1999;23(3):487-490.
    Doke, T. ; Hasebe, Nobuyuki ; Hayashi, T. ; Itsumi, K. ; Kikuchi, J. ; Kobayashi, M. N. ; Kondoh, K. ; Shirai, H. ; Takashima, T. ; Takehana, T. ; Yamada, Y. ; Yanagimachi, T. ; Yashiro, J. / Observation of galactic cosmic ray particles by the HEP-HI telescope on the GEOTAIL satellite. In: Advances in Space Research. 1999 ; Vol. 23, No. 3. pp. 487-490.
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