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Quasi-optical launchers for lower hybrid waves: a full wave approach

F. Frezza, G. Schettini, F. Gori, M. Santarsiero, F. Santini1994年被引用 10Nuclear FusionIF 3出版社

Theoretical investigations on the use of an advanced launcher to couple lower hybrid waves to a plasma, for current drive in tokamaks, have been developed. A study of the coupling has been carried out in a rigorous way, through the solution of the scattering by an array of cylinders with parallel axes in the presence of a plane of discontinuity for the electromagnetic constants. The general features of the proposed method are presented together with results on the launched spectra and coupled power. The numerical results of this work are relevant to the optimization of the single layer quasi-optical grill launching RF power towards a constant density plasma: it is shown that the power coupled in the plasma can reach values of about 25-30% in the -1 diffracted order and about 40% in all other orders. As a consequence it is expected that the coupling values for a suitable double layer configuration should approach those for total transmission

日本語訳

トカマクにおける電流駆動のための低域混成波をプラズマに結合させる先進ランチャーの使用に関する理論的調査が展開されてきた。結合の研究は、電磁定数の不連続面の存在下での平行軸を持つ円柱の配列による散乱の解法を通じて、厳密な方法で実施された。提案された方法の一般的特徴が、放射スペクトルと結合電力に関する結果とともに提示される。この研究の数値結果は、一定密度プラズマに向けてRF電力を放射する単層準光学グリルの最適化に関連するものである:プラズマに結合される電力は、-1次回折次数において約25〜30%、他のすべての次数において約40%の値に達し得ることが示される。その結果として、適切な二層構成に対する結合値は全透過の値に近づくことが期待される。

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