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A non-localsynergism between electron cyclotron waves and lower hybrid waves induced by transport

P R da S Rosa, L F Ziebell2001年Plasma Physics and Controlled FusionIF 2.2出版社

In this paper, we study the effects of particle radial transport on theelectron cyclotron (EC) and lower hybrid (LH) power deposition profilesand current drive efficiency. We consider a tokamak plasma under thecombined action of LH waves, EC waves, collisions and spatial transportof electrons across the magnetic surfaces, and consider situations inwhich the spatial location of the peaks of power deposition profiles forEC and LH waves is not the same. Our results, found from numericalsolution of the diffusion equation, indicate significant modification inthe LH power deposition profile and show evidence of a non-localsynergism between LH and EC waves when transport is present, leading tostrong enhancing of RF current drive efficiency.

日本語訳

本論文では,粒子の径方向輸送が電子サイクロトロン(EC)および低域混成(LH)波のパワー堆積分布と電流駆動効率に及ぼす影響について検討する。我々は,トカマクプラズマにおいて,LH波,EC波,衝突,および磁気面を横切る電子の空間輸送が同時に作用する状況を考察し,EC波とLH波のパワー堆積分布のピーク位置が空間的に異なる場合を想定する。拡散方程式の数値解から得られた結果は,輸送が存在する場合,LH波のパワー堆積分布が有意に変化することを示し,さらに,輸送存在下ではLH波とEC波の間に非局所的な相乗効果が生じ,RF電流駆動効率が大幅に向上する証拠が得られた。

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Lower hybridCyclotron waveElectron cyclotron wave
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