Suppression of Edge Localized Modes in ITER Baseline Scenario in EAST using Edge Localized Magnetic Perturbations

P. Xie, Y. Sun, M. Jia, A. Loarte, Y. Q. Liu, C. Ye, S. Gu, H. Sheng, Y. Liang, Q. Ma, H. Yang, C. A. Paz-Soldan, G. Deng, S. Fu, G. Chen, K. He, T. Jia, D. Lu, B. Lv, J. Qian, H. H. Wang, S. Wang, D. Weisberg, X. Wu, W. Xu, X. Yan, Y. Yu, Q. Zang, L. Zeng, T. Zhang, C. Zhou, Z. Zhou, B. Wan, the EAST Team
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Abstract

We report the suppression of Type-I Edge Localized Modes (ELMs) in the EAST tokamak under ITER baseline conditions using $n = 4$ Resonant Magnetic Perturbations (RMPs), while maintaining energy confinement. Achieving RMP-ELM suppression requires a normalized plasma beta ($\beta_N$) exceeding 1.8 in a target plasma with $q_{95}\approx 3.1$ and tungsten divertors. Quasi-linear modeling shows high plasma beta enhances RMP-driven neoclassical toroidal viscosity torque, reducing field penetration thresholds. These findings demonstrate the feasibility and efficiency of high $n$ RMPs for ELM suppression in ITER.
利用边缘局部磁扰动抑制 EAST 中 ITER 基准方案的边缘局部模态
我们报告了在ITER基线条件下使用$n = 4$共振磁扰动(RMPs)抑制EASTtokamak中的I型边缘局部模(ELMs),同时保持能量约束的情况。实现RMP-ELM抑制要求目标等离子体中的归一化等离子体β($\beta_N$)超过1.8,q_{95}\approx 3.1$和钨分流器。准线性建模显示,高等离子体β能增强RMP驱动的新古典环形粘滞力矩,降低场穿透阈值。这些发现证明了在热核实验堆中使用高 n$ RMP 抑制 ELM 的可行性和效率。
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