| Project/Area Number |
07680502
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
プラズマ理工学
|
|---|
| Research Institution | University of Tokyo |
|---|
Principal Investigator |
ONO Yasushi Univ.Tokyo, Dept.Electrical Engineering, Associate Professor, 大学院・工学系研究科, 助教授 (30214191)
|
|---|
| 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)
|
|---|
| Project Period (FY) |
1995 – 1996
|
| Project Status |
Completed (Fiscal Year 1996)
|
| Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1996: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1995: ¥1,300,000 (Direct Cost: ¥1,300,000)
|
|---|
| Keywords | Magnetic Reconnection / Torus Plasma Merging / Plasma Jet / Plasma Heating / Spheromak / Fiela-Reversed Configuration / Anomalous Resistivity / イオン異常加熱 / イオン加速 / 逆転磁界配位 / トカマク |
|---|
| 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.
|
