| Project/Area Number |
05452081
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Space and upper atmospheric physics
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| Research Institution | University of Tokyo |
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Principal Investigator |
TERASAWA Toshio University of Tokyo, Graduate School of Science, Professor, 大学院・理学系研究科, 教授 (30134662)
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| Co-Investigator(Kenkyū-buntansha) |
HOSHINO Masahiro Institute of Space and Astronautical Science, Associate Professor, 助教授 (90241257)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥7,000,000 (Direct Cost: ¥7,000,000)
Fiscal Year 1994: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1993: ¥4,800,000 (Direct Cost: ¥4,800,000)
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| Keywords | Magnetic reconnection / Magnetohydrodynamics / Computational physics / Turbulence / Plasma instability |
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| 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
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