An external 3D magnetic perturbation typically drives a resonant response at the rational surfaces from the core to the edge of tokamak plasmas, due to strong mode coupling and amplification. This paper presents a method to isolate the edge from core resonant fields using the ideal perturbed equilibrium code and to design an edge-localized resonant magnetic perturbation (RMP) for effective edge localized mode (ELM) control. A robust feature of the edge-localized RMP is the curtailed response to the field at the low-field-side (LFS) midplane, as opposed to typical RMPs which strongly resonate with the LFS fields. This emphasizes the importance of off-midplane coils to improve ELM control without provoking a large core response that could lead to devastating instabilities. The conceptual design of new ELM control coils based on the edge-localized RMP in KSTAR shows how this new insight can be utilized to enhance the efficiency of our ELM suppression capabilities. Simple window-pan...

中文翻译：

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局部共振磁扰动，用于KSTAR中的边缘局部模式控制

由于强模式耦合和放大作用，外部3D磁扰动通常会在从磁芯到托卡马克等离子体边缘的合理表面上驱动共振响应。本文提出了一种使用理想的扰动平衡码将边缘与核心共振场隔离的方法，并设计了一种用于有效边缘局部模式（ELM）控制的边缘局部共振磁扰动（RMP）。边缘局部RMP的一个强大功能是降低了对低场侧（LFS）中平面的磁场的响应，这与典型的RMP在LFS场中产生强烈的共振相反。这强调了中底板线圈在改善ELM控制而又不会引起较大的铁芯响应（可能导致毁灭性不稳定性）方面的重要性。基于KSTAR中基于边缘定位的RMP的新型ELM控制线圈的概念设计显示了如何利用这一新见识来提高我们的ELM抑制功能的效率。简单的窗玻璃