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Wave chaos and the dependence of LHCD efficiency on temperature

K. Kupfer, D. Moreau1992年被引用 32Nuclear FusionIF 3出版社

Weakly damped lower hybrid wave propagation is shown to be chaotic for parameter regimes typical of current drive in TORE SUPRA and IT-60. In these cases, the spectral gap is filled by wave energy that diffuses to higher parallel wavenumber k// in the stochastic layer. Agreement between theoretical and experimental scalings for the current drive efficiency is obtained by including nonresonant losses of wave energy due to collisions and loss reflections near the plasma edge which reduce the efficiency at low temperatures when the spectral gap is large

日本語訳

弱減衰の低混成波伝搬は、TORE SUPRAおよびIT-60における電流駆動に典型的なパラメータ領域においてカオス的であることが示される。これらの場合、スペクトルギャップは、ストカスティック層内でより高い平行波数k//へと拡散する波動エネルギーによって満たされる。電流駆動効率に対する理論的・実験的スケーリングの一致は、衝突による波動エネルギーの非共鳴損失と、スペクトルギャップが大きいときに低温で効率を低下させるプラズマ端近傍での損失反射とを含めることによって得られる。

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Lower hybrid current drive
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