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HINT modeling of three-dimensional tokamaks with resonant magnetic perturbation

Yasuhiro Suzuki2017年Plasma Physics and Controlled FusionIF 2.2出版社

In order to consider the nonlinear three-dimensional (3D) equilibrium response of the resonant magnetic perturbation field, the nonlinear 3D equilibrium is discussed for the 3D perturbed tokamak. To model the magnetic topology, a nonlinear 3D equilibrium calculation code, which has been developed in stellarator research, is applied to the perturbed tokamak. That code does not assume the existence of perfectly nested flux surfaces. In the nonlinear 3D equilibrium calculation, the change of the magnetic topology is due to the nonlinear 3D equilibrium response, which is the lowest order plasma response appearing in the 3D steady state. The parallel current flow along perturbed field lines three-dimensionally drives the perturbed field to break the magnetic topology. This effect is significant along the separatrix and must be considered to interpret the experimental observations.

日本語訳

非線形三次元(3D)平衡応答を共鳴磁場摂動に対して考察するため、摂動を受けたトカマクにおける非線形3D平衡について議論する。磁気トポロジーをモデル化するために、ステラレータ研究で開発された非線形3D平衡計算コードを摂動トカマクに適用する。このコードは、完全に入れ子になった磁気面の存在を仮定しない。非線形3D平衡計算において、磁気トポロジーの変化は非線形3D平衡応答に起因し、これは3D定常状態に現れる最低次のプラズマ応答である。摂動磁場に沿った平行電流の流れは、三次元的に摂動磁場を駆動し、磁気トポロジーを破壊する。この効果はセパラトリクスに沿って顕著であり、実験結果を解釈する際に考慮しなければならない。

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Magnetic perturbationResonant magnetic perturbation
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