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1994 Fiscal Year Final Research Report Summary

Study of three dimensional reconnection processes

Research Project

Project/Area Number 05452081
Research Category

Grant-in-Aid for General Scientific Research (B)

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

Principal Investigator

TERASAWA 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) HOSHINO Masahiro  Institute of Space and Astronautical Science, Associate Professor, 助教授 (90241257)
Project Period (FY) 1993 – 1994
KeywordsMagnetic reconnection / Magnetohydrodynamics / Computational physics / Turbulence / Plasma instability
Research Abstract

We have studied the tree dimensional structure of the magnetic neutral line, which is believed to be important in the magnetic reconnection process in space plasma environment. New findings/developments are
1) New hybrid/two-fluid numerical scheme with high accuracy. Discovery of the excitation of turbulence due to the coupling between tearing mode and drift wave instabilities
2) Observational evidence of the Alfvenic relation between the velocity perturbation and field perturbation, which has been theoretically predicated in our study in 1993.
3) Construction of a new 2-fluid/hybrid scheme retaining the electron inertia effect, which is believed to be important for the microstructure of magnetic neutral lines. We have found the possibility that the electron tail current contribution can exceed the ion tail current.
4) Observation of non-Harris type tail current structure
5) Existence of a characteristic spatial/time scale in the magnetotail turbulence

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Terasawa,T.: "A new class of exact colutions for 3D compressible reconnection problem" J.Geomaag.Geoelectr.45. 613-618 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Fujimoto,M.: "Anomalous ion mising within an MHD scale KH vortex" J.Geophys.Res.99. 8601-8613 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Terasawa,T: "Ion acceleratopm" Adv.Space Res.(in press).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Terasawa,T: "Three dimensional structure of reconnection region" Adv.Space Res.(in press).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sugiyama,T.: "Attenuation distance of low frequency waves upstream of the pre-dawn bow shock:GEOTAIL and ISEE-3 comparison" Geophys.Res.Letters. (in press).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tsubouchi,K.: "The energization of cold ions around a plasmoid in the magnetotail" J.Geomag.Geoelectr.(in press).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Terasawa: "A new class of exact solutions for 3D Compressible reconnection problem" J.Geomag.Geoelectr.45. 613-618 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Fujimoto: "Anomalous ion mixing within an MHD scale KH vortex" J.Geophys.Res.99. 8601-8613 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Terasawa: "Ion acceleration" Adv.Space Res.(in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Sugiyama: "Attenuation distance of low frequency waves upstream of the pre-dawn bow shock : GEOTAIL and ISEE-3 comparison" Geophys.Res.Letts.(in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Tsubouchi: "The energization of cold ions around a plasmoid in the magnetotail" J.Geomag.Geoelectr.(in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Hoshino: "Turbulent magnetic field in the distant magnetotail : Bottom-up process of plasmoid formation?" Geophys.Res.Letts.21. 2935-2938 (1994)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1996-04-15  

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