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Intrinsic parallel rotation drive by electromagnetic ion temperature gradient turbulence

Shuitao Peng, Lu Wang, Yuan Pan2017年被引用 12Nuclear FusionIF 3出版社

The quasilinear intrinsic parallel flow drive including parallel residual stress, kinetic stress, cross Maxwell stress and parallel turbulent acceleration by electromagnetic ion temperature gradient (ITG) turbulence is calculated analytically using electromagnetic gyrokinetic theory. Both the kinetic stress and cross Maxwell stress also enter the mean parallel flow velocity equation via their divergence, as for the usual residual stress. The turbulent acceleration driven by ion pressure gradient along the total magnetic field (including equilibrium magnetic field and fluctuating radial magnetic field) cannot be written as a divergence of stress, and so should be treated as a local source/sink. All these terms can provide intrinsic parallel rotation drive. Electromagnetic effects reduce the non-resonant electrostatic stress force and even reverse it, but enhance the resonant stress force. Both the non-resonant and resonant turbulent acceleration terms are also enhanced by electromagnetic effects. The possible implications of our results for experimental observations are discussed.

日本語訳

準線形固有平行流駆動(平行残留応力、運動論的応力、交差マクスウェル応力、および電磁的イオン温度勾配(ITG)乱流による平行乱流加速を含む)を、電磁的ジャイロ運動論を用いて解析的に計算する。運動論的応力と交差マクスウェル応力も、通常の残留応力と同様に、その発散を介して平均平行流速度方程式に入る。全磁場(平衡磁場と変動する動径方向磁場を含む)に沿ったイオン圧力勾配によって駆動される乱流加速は、応力の発散として書くことができないため、局所的な源・沈み込みとして扱うべきである。これらの項はすべて、固有平行回転駆動を提供し得る。電磁的効果は、非共鳴静電応力を減少させ、さらには反転させるが、共鳴応力は増強する。非共鳴および共鳴の乱流加速項も、電磁的効果によって増強される。我々の結果が実験的観測に与える可能性のある含意について議論する。

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Ion temperature gradientTemperature gradient turbulence
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