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Loss cone structure for ions in the TJ-II helical axis stellarator Part II: Radial electric field effects

J. Guasp, M. Liniers2000年被引用 12Nuclear FusionIF 3出版社

Previous studies are extended of losses and trapping for collisionless ions of low and intermediate energy (0.1-1 keV roughly), done for the TJ-II helical axis stellarator, to the case where radial electric fields are present. The modifications produced by the electric field on the radial profile of losses, the angular distributions at the plasma exit and the impact patterns on the TJ-II vacuum vessel are analysed showing a progressive peripheral concentration and a slow rotation of the distributions of lost particles at the plasma exit and on the vacuum vessel in the direction of the poloidal rotation induced by the electric field. Changes in radial and angular trapping distributions are discussed, showing the relative insensitivity to the electric field of the angular positions where the maxima and minima of trapping occur. The effect of the electric field resonances is analysed and there is a discussion of the order of appearance of the different TJ-II magnetic configurations and the influence on trapping and losses. The modifications produced by the electric field and the resonances on the different loss cone diagrams are analysed and explained.

日本語訳

先行研究は、低・中エネルギー(おおよそ0.1〜1 keV)の無衝突イオンに対する損失と閉じ込めの研究を、TJ-IIヘリカル軸ステラレーターにおいて、動径電場が存在する場合へと拡張するものである。動径電場によって生じる損失の動径プロファイル、プラズマ端部における角度分布、およびTJ-II真空容器への入射分布の変化を解析し、動径電場によって誘起されるポロイダル回転の方向への、損失粒子のプラズマ端部および真空容器上での分布の漸進的な周辺部への集中と緩慢な回転を示す。閉じ込めの動径分布および角度分布の変化について考察し、閉じ込めの極大値および極小値が生じる角度位置の動径電場に対する相対的な不感性を示す。動径電場共鳴の影響を解析し、異なるTJ-II磁場配位における出現順序と、閉じ込めおよび損失への影響について考察する。動径電場および共鳴によって生じる異なる損失円錐図形の変化を解析し、説明する。

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tj-ii高精度(タイトル一致)

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StellaratorTJ-IIRadial electric field
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