2012 Fiscal Year Final Research Report
New phenomena on turbulence transport caused by electron-ion hybrid temperature gradient in magnetized plasma
| Project/Area Number |
22340168
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Plasma science
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| Research Institution | Tohoku University |
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Principal Investigator |
KANEKO Toshiro 東北大学, 大学院・工学研究科, 教授 (30312599)
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| Co-Investigator(Kenkyū-buntansha) |
KATO Toshiaki 東北大学, 大学院・工学研究科, 助教 (20502082)
HATAKEYAMA Rikizo 東北大学, 大学院・工学研究科, 名誉教授 (00108474)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 電子温度勾配モード / ドリフト波モード / 非線形結合 / バイスペクトル解析 / プ ラズマ乱流 / 輸送現象 / フロー速度シア |
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| Research Abstract |
Electron temperature gradient (ETG) perpendicular to magnetic field lines is formed by superimposing high-temperature electrons of an electron cyclotron resonance (ECR) plasma upon low-temperature thermionic electrons. The formed ETG is found to excite a high-frequency fluctuation (ETG mode), and also, to stimulate a low-frequency fluctuation (drift-wave mode) excitement via multi-scale nonlinear interaction, which ultimately causes ETG mode energy to be transferred to the drift-wave mode. Furthermore, the strong E×B velocity shear is demonstrated to suppress the ETG mode and drift-wave mode, experimentally.
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