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Global forces on the COMPASS-U wall during plasma disruptions

V.V. Yanovskiy, N. Isernia, V.D. Pustovitov, V. Scalera, F. Villone, J. Hromadka, M. Imrisek, J. Havlicek, M. Hron, R. Panek2021年被引用 11Nuclear FusionIF 3出版社

First, it is shown that during electromagnetic transients in COMPASS-U the poloidal field coils must drain sizeably the current from the vessel and, therefore, reduce disruption forces and their duration. Next, the role of poloidal eddy current (which is absent in some approaches) in the dynamics of vertical and radial forces is found to be essential. Finally, to verify the CarMa0NL modelling for COMPASS-U, the numerical results are cross-validated with general analytical predictions (Pustovitov 2015 Nucl. Fusion55 113032): the computed vertical force on the tokamak wall is found to be almost zero during rapid (jump-like) transients, as it should be because of strong skin-effect. This test proves the credibility of the simulation model and computational realization.

日本語訳

まず、COMPASS-Uにおける電磁過渡現象中、ポロイダル磁場コイルは容器からかなりの電流を排出しなければならず、それによってディスラプション力とその持続時間を低減することが示される。次に、(いくつかのアプローチでは欠落している)ポロイダル渦電流が、垂直力と径方向力のダイナミクスにおいて本質的な役割を果たすことが見出される。最後に、COMPASS-Uに対するCarMa0NLモデリングを検証するため、数値結果は一般的な解析的予測(Pustovitov 2015 Nucl. Fusion55 113032)と相互検証される:トカマク壁に作用する計算上の垂直力は、強い表皮効果のため、急速な(ジャンプ状の)過渡現象中はほぼゼロになることが見出される。この試験は、シミュレーションモデルと計算実装の信頼性を証明するものである。

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