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Magnetic field profiles in fusion plasmas in the presence of equilibrium flow

L Guazzotto, R Paccagnella2009年Plasma Physics and Controlled FusionIF 2.2出版社

In nuclear fusion magnetic-confinement devices, equilibrium calculations for realistic systems are necessarily based on numerical solutions. In this work, we describe some of the latest updates to the code FLOW (Guazzotto et al 2004 Phys. Plasmas11 604) and give some applications. We apply the code to both tokamak and reversed field pinch (RFP) configurations. It is shown that plasma rotation can have a non-negligible effect on tokamak resonant modes, such as neoclassical tearing modes, in particular by modifying the location of the resonant surface. Regarding RFPs, we show how toroidal flow reversal (detected in experiments) can be understood as an equilibrium effect, and how the neoclassical effect can modify the plasma resistivity and current profiles.

日本語訳

核融合磁気閉じ込め装置における平衡計算は、現実的な系に対しては必然的に数値解法に基づくものとなる。本論文では、コードFLOW(Guazzotoら 2004 Phys. Plasmas 11 604)の最新の更新内容の一部を述べ、その応用例を示す。本コードをトカマク配置と反転磁場ピンチ(RFP)配置の両方に適用する。プラズマ回転は、トカマクの共鳴モード、特に新古典テアリングモードに対して無視できない影響を及ぼし得ること、とりわけ共鳴面の位置を変更することにより影響を及ぼすことが示される。RFPに関しては、実験で検出されたトロイダル流の反転が平衡効果として理解され得る方法と、新古典効果がプラズマ抵抗率および電流分布を変更し得る方法を示す。

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