The Energetic Particle Spectrometer Hep onboard the Geotail Spacecraft

T. Doke, T. Ito, T. Hayashi, K. Itsumi, T. Kashiwagi, J. Kikuchi, T. Takashima, T. Shino, M. Fujii, K. Fujiki, Nobuyuki Hasebe, H. Moriya, H. Nagoshi, T. Yamamoto1, M. Fujimoto, T. Fukui, K. Maezawah, F. Gliem, W. Guttler, S. LiviH. Sommer, W. Weiss, B. Wilken, T. Kohno, S. Kokubun, K. Munakata, H. Murakami, A. Nakamoto, T. Yanagimachi, Y. Muraki, K. Nagata1, A. Nishida, T. Terasawa, S. Ullaland, S. Yanagita

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

The instruments for the HEP (High Energy Particle) experiments of the Geotail mission, launched in July 1992, consist of 5 spectrometers (Ld, Bd, Mi-1, Mi-2 and Hi). The LD (Low energy particle Detector) and the Bd (Burst Detector) are mainly used to measure electrons, protons, helium and oxygen ions which reflect plasma dynamics in the magnetotail region. On the other hand, Mi-1, Mi-2 (Medium energy Isotope telescope-1, -2) and Hi (High energy Isotope telescope) are used to measure the isotope abundance of solar flare particles and cosmic ray particles which reflect physical conditions of interplanetary space and origin of these particles. In this paper, the objectives of these experiments, the details of the instruments and preliminary results from the observation in the magnetotail are given. The preliminary results obtained by the LD and BD show that a highly collimated beam of energetic particles appear in the plasma sheet just after the substorm onset and that directional distribution of particles can be radically different for different energies. In the Mi and HI telescopes, details a remarkable enhancement of anomalous cosmic ray components (N, O) in the quiet time of solar activity is reported, as well as the element composition of galactic cosmic rays.

Original languageEnglish
Pages (from-to)713-733
Number of pages21
JournalJournal of Geomagnetism and Geoelectricity
Volume46
Issue number8
DOIs
Publication statusPublished - 1994 Jan 1
Externally publishedYes

Fingerprint

energetic particles
spacecraft
spectrometer
energetics
spectrometers
isotopes
telescopes
magnetotails
isotope
cosmic ray
energy
cosmic rays
bursts
magnetotail
interplanetary space
plasma dynamics
helium ions
radiation counters
detectors
solar flares

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

Cite this

Doke, T., Ito, T., Hayashi, T., Itsumi, K., Kashiwagi, T., Kikuchi, J., ... Yanagita, S. (1994). The Energetic Particle Spectrometer Hep onboard the Geotail Spacecraft. Journal of Geomagnetism and Geoelectricity, 46(8), 713-733. https://doi.org/10.5636/jgg.46.713

The Energetic Particle Spectrometer Hep onboard the Geotail Spacecraft. / Doke, T.; Ito, T.; Hayashi, T.; Itsumi, K.; Kashiwagi, T.; Kikuchi, J.; Takashima, T.; Shino, T.; Fujii, M.; Fujiki, K.; Hasebe, Nobuyuki; Moriya, H.; Nagoshi, H.; Yamamoto1, T.; Fujimoto, M.; Fukui, T.; Maezawah, K.; Gliem, F.; Guttler, W.; Livi, S.; Sommer, H.; Weiss, W.; Wilken, B.; Kohno, T.; Kokubun, S.; Munakata, K.; Murakami, H.; Nakamoto, A.; Yanagimachi, T.; Muraki, Y.; Nagata1, K.; Nishida, A.; Terasawa, T.; Ullaland, S.; Yanagita, S.

In: Journal of Geomagnetism and Geoelectricity, Vol. 46, No. 8, 01.01.1994, p. 713-733.

Research output: Contribution to journalArticle

Doke, T, Ito, T, Hayashi, T, Itsumi, K, Kashiwagi, T, Kikuchi, J, Takashima, T, Shino, T, Fujii, M, Fujiki, K, Hasebe, N, Moriya, H, Nagoshi, H, Yamamoto1, T, Fujimoto, M, Fukui, T, Maezawah, K, Gliem, F, Guttler, W, Livi, S, Sommer, H, Weiss, W, Wilken, B, Kohno, T, Kokubun, S, Munakata, K, Murakami, H, Nakamoto, A, Yanagimachi, T, Muraki, Y, Nagata1, K, Nishida, A, Terasawa, T, Ullaland, S & Yanagita, S 1994, 'The Energetic Particle Spectrometer Hep onboard the Geotail Spacecraft', Journal of Geomagnetism and Geoelectricity, vol. 46, no. 8, pp. 713-733. https://doi.org/10.5636/jgg.46.713
Doke, T. ; Ito, T. ; Hayashi, T. ; Itsumi, K. ; Kashiwagi, T. ; Kikuchi, J. ; Takashima, T. ; Shino, T. ; Fujii, M. ; Fujiki, K. ; Hasebe, Nobuyuki ; Moriya, H. ; Nagoshi, H. ; Yamamoto1, T. ; Fujimoto, M. ; Fukui, T. ; Maezawah, K. ; Gliem, F. ; Guttler, W. ; Livi, S. ; Sommer, H. ; Weiss, W. ; Wilken, B. ; Kohno, T. ; Kokubun, S. ; Munakata, K. ; Murakami, H. ; Nakamoto, A. ; Yanagimachi, T. ; Muraki, Y. ; Nagata1, K. ; Nishida, A. ; Terasawa, T. ; Ullaland, S. ; Yanagita, S. / The Energetic Particle Spectrometer Hep onboard the Geotail Spacecraft. In: Journal of Geomagnetism and Geoelectricity. 1994 ; Vol. 46, No. 8. pp. 713-733.
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abstract = "The instruments for the HEP (High Energy Particle) experiments of the Geotail mission, launched in July 1992, consist of 5 spectrometers (Ld, Bd, Mi-1, Mi-2 and Hi). The LD (Low energy particle Detector) and the Bd (Burst Detector) are mainly used to measure electrons, protons, helium and oxygen ions which reflect plasma dynamics in the magnetotail region. On the other hand, Mi-1, Mi-2 (Medium energy Isotope telescope-1, -2) and Hi (High energy Isotope telescope) are used to measure the isotope abundance of solar flare particles and cosmic ray particles which reflect physical conditions of interplanetary space and origin of these particles. In this paper, the objectives of these experiments, the details of the instruments and preliminary results from the observation in the magnetotail are given. The preliminary results obtained by the LD and BD show that a highly collimated beam of energetic particles appear in the plasma sheet just after the substorm onset and that directional distribution of particles can be radically different for different energies. In the Mi and HI telescopes, details a remarkable enhancement of anomalous cosmic ray components (N, O) in the quiet time of solar activity is reported, as well as the element composition of galactic cosmic rays.",
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AU - Ito, T.

AU - Hayashi, T.

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AU - Kashiwagi, T.

AU - Kikuchi, J.

AU - Takashima, T.

AU - Shino, T.

AU - Fujii, M.

AU - Fujiki, K.

AU - Hasebe, Nobuyuki

AU - Moriya, H.

AU - Nagoshi, H.

AU - Yamamoto1, T.

AU - Fujimoto, M.

AU - Fukui, T.

AU - Maezawah, K.

AU - Gliem, F.

AU - Guttler, W.

AU - Livi, S.

AU - Sommer, H.

AU - Weiss, W.

AU - Wilken, B.

AU - Kohno, T.

AU - Kokubun, S.

AU - Munakata, K.

AU - Murakami, H.

AU - Nakamoto, A.

AU - Yanagimachi, T.

AU - Muraki, Y.

AU - Nagata1, K.

AU - Nishida, A.

AU - Terasawa, T.

AU - Ullaland, S.

AU - Yanagita, S.

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