1996 Fiscal Year Final Research Report Summary
Formation of Single Magnetic ReconnecTion Region for Studies of Its JeT and Heating Effects
| Project/Area Number |
07680502
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
プラズマ理工学
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| Research Institution | University of Tokyo |
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Principal Investigator |
ONO Yasushi Univ.Tokyo, Dept.Electrical Engineering, Associate Professor, 大学院・工学系研究科, 助教授 (30214191)
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| Co-Investigator(Kenkyū-buntansha) |
ITAGAKI Toshifumi Univ.Tokyo, Dept.Electrical Engineering, Assistant Professor, 大学院・工学系研究科, 助手 (60242012)
KATSYRAI Makoto Univ.Tokyo, Dept.Electrical Engineering, Professor, 大学院・工学系研究科, 教授 (70011103)
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| Project Period (FY) |
1995 – 1996
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| Keywords | Magnetic Reconnection / Torus Plasma Merging / Plasma Jet / Plasma Heating / Spheromak / Fiela-Reversed Configuration / Anomalous Resistivity |
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| Research Abstract |
A laboratory experiment of magnetic reconnection has been developed in the TS-3 merging device, using two colliding plasma toroids with varied q-value. The conventional two-component reconnection was extended experimentally to three-component reconnections by introducing a new field component Bx parallel to the X-line. Selective ion heating accompanied by a Alfven speed field-aligned jet was documented during the reconnection without Bx, indicating highly-efficient direct conversion of the dissipated magnetic energy into the ion thermal energy. All of ion heating, current-sheet resistivity and reconnection speed increase significantly with decreasing Bx and with increasing the external force to compress the current sheet, revealing for the first time three-component and driven effects of reconnection in the laboratory experiment. The anomalous sheet-current dissipation and the ion heating are both found to depend on ion gyromotion around the current sheet. Once the current-sheet is compressed shorter than the ion gyroradius, its effective resistivity and ion temperature were observed to increase significantly, explaining thosethree-component and driven effects of reconnection.
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