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Reduction of loop voltage and magnetic field fluctuations due to toroidal rotation in the reversed field pinch

H-E Sätherblom, D D Schnack, J R Drake1998年Plasma Physics and Controlled FusionIF 2.2出版社

Results are presented from a three-dimensional (3D), nonlinear, resistive magnetohydrodynamic (MHD)-code study of thin shell modes (TSM) in a reversed field pinch (RFP), when toroidal plasma flow is introduced by adding a drag force in the toroidal momentum balance. Without this rotation-inducing force, TSM wall-locking develops and the loop voltage and edge magnetic fluctuation level are increased compared to the conducting shell case. Inclusion of drag on the plasma which produces toroidal flow in turn creates a force on the mode perturbation. Above a threshold drag force wall-locking is eliminated, the perturbation rotates and the loop voltage and edge magnetic field fluctuations are reduced to the value of the conducting shell case.

日本語訳

三次元(3D)非線形抵抗性磁気流体力学(MHD)コードを用いた、逆転磁場配位(RFP)における薄殻モード(TSM)の研究結果を提示する。ここでは、トロイダル運動量バランスに抗力項を追加することでトロイダルプラズマ流を導入した。この回転誘起力を加えない場合、TSMの壁面ロックが発生し、ループ電圧と端部磁気揺動レベルは、完全導体壁の場合と比較して増大する。プラズマに対する抗力の導入はトロイダル流を生成し、それによりモード摂動に力が生じる。抗力が閾値を超えると、壁面ロックは解消され、摂動は回転し、ループ電圧と端部磁場揺動は完全導体壁の場合の値まで低減する。

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Reversed field pinchToroidal rotation
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