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RF current drive in a toroidal plasma in the banana regime

V.S. Belikov, Ya.I. Kolesnichenko, I.S. Plotnik1982年被引用 6Nuclear FusionIF 3出版社

The use of travelling waves for the steady-state current drive in an axisymmetric toroidal plasma in the banana regime is studied. The treatment is based on a quasi-linear equation for the electron distribution function, averaged over the period of particle motion along the small azimuth of the torus. It is shown that the trapped electrons do not absorb the energy of the monochromatic (in frequency) RF field and thus only the circulating electrons contribute to the driving current and the absorbed RF power. The current and the absorbed power are calculated by using the electron distribution function obtained for the case of a narrow wave packet, both the toroidial magnetic field and the distortion of the electron distribution with respect to transverse velocities being taken into account. The important role of the marginally circulating electrons is revealed. It is pointed out that the toroidal satellite resonances can affect the RF current drive by spreading and splitting the region of wave-particle interaction.

日本語訳

バナナ領域における軸対称トロイダルプラズマ中の定常電流駆動のための進行波の利用について研究する。この取り扱いは、トーラスの小周方向に沿った粒子運動の周期にわたって平均化された、電子分布関数に対する準線形方程式に基づく。捕捉電子は(周波数の)単色RF場のエネルギーを吸収せず、したがって循環電子のみが駆動電流と吸収RFパワーに寄与することが示される。電流と吸収パワーは、トロイダル磁場と横速度に関する電子分布の歪みの両方を考慮したうえで、幅の狭い波束の場合に対して得られた電子分布関数を用いて計算される。限界的循環電子の重要な役割が明らかにされる。トロイダル衛星共鳴は、波と粒子の相互作用の領域を広げて分割することにより、RF電流駆動に影響を及ぼし得ることが指摘される。

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