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Variational description of lower hybrid wave propagation and absorption in fusion plasmas

D. Moreau, Y. Peysson, J.M. Rax, A. Samain, J.C. Dumas1990年被引用 9Nuclear FusionIF 3出版社

A variational approach to a global solution of the lower hybrid wave propagation and absorption in fusion plasmas is presented. It is restricted to current drive or electron heating applications (i.e. when no lower hybrid resonance exists) and is based on the use of trial functions which are locally solutions of the homogeneous problem ('eikonal trial functions'). Results in circular cylindrical geometry are presented for which radial power deposition profiles have been calculated. The influence of the main plasma and wave parameters has been investigated, focusing on the effect of the toroidal wave number on the power deposition and also on the wave accessibility and the 'whispering gallery' phenomena. The radial extension and shape of the power deposition near the reflection layer of inaccessible waves (caustics) are displayed.

日本語訳

核融合プラズマにおける低混成波の伝播と吸収の大域的解法に対する変分法を提示する。この方法は、電流駆動または電子加熱の応用(すなわち、低混成共鳴が存在しない場合)に限定され、均質問題の局所解である試行関数(「アイコナール試行関数」)の使用に基づいている。円筒座標系における結果を示し、動径方向のパワー堆積分布を計算した。主要なプラズマおよび波動パラメータの影響を調査し、特にトロイダル波数がパワー堆積に及ぼす効果、ならびに波動の到達可能性と「ささやきの回廊」現象に焦点を当てた。到達不可能な波動の反射層(コースティクス)近傍におけるパワー堆積の動径方向の広がりと形状を示す。

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