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<p>The Resistive Wall Mode (RWM) is frequently linked to external kink (XK) instability, which arises from high-pressure gradients in fusion devices. This study emphasises the critical importance of adjusting the phase of Resonant Magnetic Perturbation (RMP) coils to suppress the RWM instability, while considering factors such as plasma elongation and triangularity. Using the MARS-F code [Liu et al. 2000, Phys. Plasmas 7, 3681], we investigated how phase modulation of RMP coils affects the growth rates of RWM across various plasma profiles and thin-wall conditions. Our results demonstrate the effectiveness of phase modulation of RMP coils across different configurations, including elongation, triangularity, and normalised beta. Additionally, we found that toroidal rotation is crucial in suppressing RWM growth rates. These findings provide valuable insights for designing advanced high-confinement scenarios during tokamak operations.</p>

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Study of Resistive Wall Mode Feedback Control with Varying Plasma Configurations

  • 期刊论文

  • 发表日期：

    2025年10月17日

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  • Jing Wu,
  • Shuo Wang,
  • Xue-Feng Chen,
  • Guang-Zhou Hao,
  • Lei Xue,
  • Yue-bin Liang,
  • Peng Lu,
  • Lie-Ming Yao

摘要

The Resistive Wall Mode (RWM) is frequently linked to external kink (XK) instability, which arises from high-pressure gradients in fusion devices. This study emphasises the critical importance of adjusting the phase of Resonant Magnetic Perturbation (RMP) coils to suppress the RWM instability, while considering factors such as plasma elongation and triangularity. Using the MARS-F code [Liu et al. 2000, Phys. Plasmas 7, 3681], we investigated how phase modulation of RMP coils affects the growth rates of RWM across various plasma profiles and thin-wall conditions. Our results demonstrate the effectiveness of phase modulation of RMP coils across different configurations, including elongation, triangularity, and normalised beta. Additionally, we found that toroidal rotation is crucial in suppressing RWM growth rates. These findings provide valuable insights for designing advanced high-confinement scenarios during tokamak operations.