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Study of Particle Acceleration Process in Magnetic Reconnection

Research Project

Project/Area Number 07640584
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Space and upper atmospheric physics
Research InstitutionUniversity of Tokyo

Principal Investigator

TERASSAWA Toshio  University of Tokyo, Graduate School of Science, Professor, 大学院・理学系研究科, 教授 (30134662)

Co-Investigator(Kenkyū-buntansha) HIRAHARA Masafumi  University of Tokyo, Graduate School of Science, Research Associate, 大学院・理学系研究科, 助手 (50242102)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1996: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1995: ¥1,900,000 (Direct Cost: ¥1,900,000)
Keywordsmagnetic reconnection / formation of the magnetosphere / ionospheric ions / transport of solar wind ions / origin of the tail plasma sheet / lower hybrid drift instability / anomalous resistivity / ドリフト低域混成波動不安定性(LHDI) / 磁気圏尾部 / プラズマシート / 粒子加速 / 遅進衝撃波
Research Abstract

We study the particle acceleration process in magnetic reconnection, and obtained new results concerning,
(1) structure of slow shocks in the magnetotail
(2) non steady reconnection process in the magnetotail
(3) development of a new technique, "Minimization of Faraday's Resicue", which can be applied to any MHD system to obtain their spatial structure.
(4) microscopic structure of the diffusion region
(5) discoveries on the solar wind entry process to the magnetosphere :
a. During the southward IMF periods, significant fraction of ionospheric oxygen ions (O_+) are transported to the distant tail region, where they are well mixed with the solar wind plasma.
b. During the periods when the northward IMF dominates, we suggest that there is a slow diffusive transport of the plasma from the solar wind into the plasma sheet through the magnetotail flanks.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (27 results)

All Other

All Publications (27 results)

  • [Publications] Seki,K.,et al.: "Coexistence of earth-origin O_+ and solar wind-origin H^+/H2^<++> in the distant magnetotail" Geophys.Res.Lett.23. 985-988 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hirahara,M.,et al.: "Cold dense ion flows with multiple components observed in the distant tail lobe by Geotail" J.Geophys.Res.101. 7769-7784 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Terasawa,T.,et al.: "On the determination of a moving MHD structure : Minimization of the residue of integrated Faraday's equation" J.Geomag.Geoelectr.48. 603-614 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hirahara,M.,et al.: "Cold ion streams consisting of double proton populations and singly charged oxygen observed at the distant magnetopause by Geotail : A case study" J.Geophys.Res.(印刷中). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Terasawa,T.,et al.: "Solar wind control of density and temperature in the near-earth plasma sheet : WIND-GEOTAIL collaboration" Geophys.Res.Letters. (印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Nakamura,M.,et al.: "GEOTAIL observation at the dayside magnetopause-Confirmation of the reconnection events--" Adv.Space Res.(印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 松井孝典: "地球連続流体力学" 岩波書店, 319 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Seki, K., et al: "Coexistence of earth-origin O+ and solar wind-origin H+/He++ in the distant magnetotail" Geophys. Res. Lett.23. 985-988 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hirahara, M., et al: "Cold dense ion flows with multiple components observed in the distant tail lobe by Geotail" J.Geophys. Res.101. 7769-7784 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Terasawa, T., et al: "On the determination of a moving MHD structure : Minimization of the residue of integrated Faraday's equation" J.Geomag. Geoelectr.48. 603-614 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hirahara, M., et al: "Cold ion streams consisting of double proton populations and singly charged oxygen observed at the distant magnetopause by Geotail : A case study" J.Geophys. Res.(in press). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Terasawa, T., et al: "Solar Wind Control of Density and Temperature in the Near-Earth Plasma Sheet : WIND-GEOTAIL Collaboration" Geophys. Res. Letters. (in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Nakamura, M., et al: "GEOTAIL observation at the dayside magnetopause -Confirmation of the reconnection events--" Adv. Space Res.(in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Matsui, T.: Chikyuu renzoku ryuutai rikigaku. Iwanami Shoten, (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Seki,K.,et al.: "Coexistence of earth-origin O_+ and solar wind-origin H_+/H_<++> in the distant magnetotail" Geophys.Res.Lett.23. 985-988 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Hirahara,M.,et al.: "Cold dense ion flows with multiple components observed in the distant tail lobe by Geotail" J.Geophys.Res.101. 7769-7784 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Terasawa,T.,et al.: "On the determination of a moving MHD structure:Minimization of the residue of integrated Faraday's equation" J.Geomag.Geoelectr.48. 603-614 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Hirahara,M.,et al.: "Cold ion streams consisting of double proton populations and singly charged oxygen observed at the distant magnetopause by Geotail:A case study" J.Geophys.Res.(印刷中). (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Terasawa,T.,et al.: "Solar wind control of density and temperature in the near-earth plasma sheet:WIND-GEOTAIL collaboration" Geophys.Res.Letters. (印刷中). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Nakamura,M.,et al.: "GEOTAIL observation at the dayside magnetopause-Confirmation of the reconnection events--" Adv.Space Res.(印刷中). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 松井 孝典: "地球連続体力学" 岩波書店, 319 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] M.Fujimoto: "Anomalous ion mixing within an MHD scale Kelvin-Helmholtz vortex,2,Effects of inhomogeneity" J.Geophys.Res.100. 12,025-12,033 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] H.Shimazu: "Electromagnetic induction heating of meteorite parent bodies by the primodial solar wind" J.Geophys.Res.100. 16,923-16,930 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Y.Saito: "Slow-mode shocks in the magnetotail" J.Geophys.Res.100. 23,567-23,581 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] T.Sugiyama: "On the origin of the upstream diffuse ions:Case Studies from GEOTAIL observations" J.Geomag.Geoelectr.(印刷中). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] T.Terasawa: "On the determination of a moving MHD structure:Minimization of the residue of integrated Faraday's eqution" J.Geomag.Geoelectr.(印刷中). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] K.Seki: "Coexistence of earth-origin O+and solar wind origin H+/He+in the distant magnetotail" Geophys.Res.Letters. (印刷中). (1996)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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