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Nonlinear frequency chirping and radial restructure of the ion-temperature-gradient-driven turbulence

Shiqiao Sun, Zihao Wang, Shaojie Wang, Zongliang Dai2022年被引用 2Nuclear FusionIF 3出版社

Global nonlinear gyrokinetic simulation of the ion-temperature-gradient (ITG) modes clearly demonstrates the nonlinear phase-space resonance, which can be well understood by the nonlinear frequency chirping due to the nonlinear poloidal acceleration of resonant particles by the large-scale structure of radial electric field rather than the widely discussed local shearing effects of the zonal flows. The nonlinear radial restructure of a single-n ITG mode generates multiple daughter-ballooning-modes.

日本語訳

イオン温度勾配(ITG)モードの大域的非線形ジャイロ運動論的シミュレーションは、非線形位相空間共鳴を明確に示しており、これは、広く議論されている帯状流の局所的シアリング効果ではなく、動径電場の大規模構造による共鳴粒子の非線形ポロイダル加速に起因する非線形周波数チャープによって十分に理解され得る。単一nのITGモードの非線形動径的再構築は、複数の娘バルーニングモードを生成する。

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