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Simulation of high Q plasma by ICRF heating of alpha particles

M. Yamagiwa, H. Kimura, T. Takizuka1989年被引用 1Nuclear FusionIF 3出版社

The possibility of achieving a high effective Q plasma (Q is the fusion power multiplication factor) by increasing the power transfer from alpha particles to the background plasma through heating in the ion cyclotron range of frequencies (ICRF) is examined. The effective Q-value, Qeff, which is defined as the ratio of the indirect plasma heating power from ICRF heated alpha particles to the direct heating power, is evaluated by using the rate of wave absorption by alpha particles on the basis of the energy moments of the quasi-linear RF diffusion operator. The fourth harmonic alpha cyclotron wave, which is absorbed mainly by alpha particles in the absence of hydrogen, should be favourable for achieving a high Qeff plasma. In the high magnetic field, Qeff can also be quite well increased by the third harmonic wave. Effects of tail formation by ICRF waves and of wave absorption by hydrogens on Qeff are also discussed.

日本語訳

高実効Qプラズマ(Qは核融合出力増倍率)を、イオンサイクロトロン周波数帯域(ICRF)における加熱を通じてアルファ粒子から背景プラズマへの電力輸送を増加させることによって達成する可能性を検討する。準線形RF拡散演算子のエネルギー・モーメントに基づくアルファ粒子による波の吸収率を用いて、ICRF加熱されたアルファ粒子からの間接的なプラズマ加熱電力と直接加熱電力の比として定義される実効Q値Qeffを評価する。水素が存在しない場合に主にアルファ粒子によって吸収される第4高調波アルファサイクロトロン波は、高Qeffプラズマの達成に有利であるはずである。高磁場では、第3高調波によってもQeffをかなり増加させることができる。ICRF波によるテール形成と水素による波の吸収がQeffに及ぼす影響についても議論する。

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Ion cyclotron heatingAlpha particles
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