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A quantitative investigation of rotating magnetic field current drive in a field-reversed configuration

A J Knight, I R Jones1990年Plasma Physics and Controlled FusionIF 2.2出版社

It is experimentally demonstrated that a Field-Reversed Configuration can be generated and maintained by the rotating magnetic field technique of driving plasma current. For the particular discharge described in this paper, detailed measurements showed that the pressure varied linearly with the poloidal flux function and that the contribution of any ponderomotive force to plasma confinement was negligible. Consequently, the observed plasma/field equilibrium could be adequately described by the Solov'ev solution of the Grad-Shafronov equation. Detailed measurements were made of the amplitude and phase of the rotating magnetic field within the plasma volume. Incomplete penetration of the rotating field into the plasma was observed. Nevertheless, about half the maximum possible amount of driven current was obtained. An appropriate analysis of the experimental data indicated that the standard rotating magnetic field current drive theory (mobile electrons, immobile ions, infinitely long plasma cylinder) was capable of quantitatively describing the current drive mechanism operative in the experiment.

日本語訳

磁場反転配位が、プラズマ電流を駆動する回転磁場技術によって生成・維持され得ることが実験的に実証された。本論文で述べる特定の放電について、詳細な測定により、圧力がポロイダル磁束関数と線形に変化すること、およびプラズマ閉じ込めに対するポンデロモーティブ力の寄与が無視できることが示された。その結果、観測されたプラズマ・磁場平衡は、グラッド・シャフラノフ方程式のソロビエフ解によって適切に記述できることが明らかとなった。プラズマ体積内における回転磁場の振幅と位相の詳細な測定が行われた。プラズマへの回転磁場の浸透は不完全であった。それにもかかわらず、駆動電流は理論上の最大値の約半分が得られた。実験データの適切な解析により、標準的な回転磁場電流駆動理論(移動可能な電子、不動のイオン、無限に長いプラズマ円柱)が、実験において作用する電流駆動機構を定量的に記述できることが示された。

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Current driveField-Reversed Configuration
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