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Quasilinear description of radiofrequency-induced radial diffusion

M. Brambilla2007年被引用 6Nuclear FusionIF 3出版社

We derive the bounce-averaged quasilinear (QL) operator in axisymmetric toroidal geometry using the standard QL formalism. When specialized to resonant ion cyclotron harmonic interactions, this operator predicts the same radiofrequency-induced radial diffusion as the orbit-averaged operator (Eriksson and Helander 1994 Phys. Plasmas1 308) obtained using action-angle variables. By assuming the wave field known as a superposition of toroidal and poloidal Fourier modes, the QL diffusion coefficients are written in a form which can be directly evaluated using the output of a spectral full-wave solver of Maxwell equations in toroidal plasmas.

日本語訳

我々は、標準的な準線形(QL)形式を用いて、軸対称トロイダル幾何学におけるバウンス平均化された準線形演算子を導出する。共鳴イオンサイクロトロン高調波相互作用に特化した場合、この演算子は、作用・角変数を用いて得られた軌道平均演算子(Eriksson and Helander 1994 Phys. Plasmas **1**, 308)と同じ高周波誘起動径拡散を予測する。波動場がトロイダルおよびポロイダルフーリエモードの重ね合わせとして既知であると仮定することにより、QL拡散係数は、トロイダルプラズマにおけるマクスウェル方程式のスペクトル全波ソルバーの出力を用いて直接評価できる形式で記述される。

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