Resonant magnetic perturbations (RMPs) are extensively applied to mitigate or suppress the edge localized mode in tokamak plasmas, but will break the axisymmetric magnetic field configuration and increase the loss of energetic ions. The mechanism of RMPs induced energetic ion loss has been extensively studied, and is mainly attributed to resonant effects. In this paper, in the perturbed non-axisymmetric tokamak pedestal, we analytically derive the equations of guiding center motion for energetic ions including the bounce/transit averaged radial drift velocity and the toroidal precession frequency modified by strong radial electric field. The loss time of energetic ions is numerically solved and its parametric dependence is analyzed in detail. We find that passing energetic ions cannot escape from the plasma, while deeply trapped energetic ions can escape from the plasma. The strong radial electric field plays an important role in modifying the toroidal precession frequency and r...

中文翻译：

---

共振磁扰动对托卡马克基座上高能离子损失的影响

共振磁扰动（RMP）被广泛应用于减轻或抑制托卡马克等离子体中的边缘局域模式，但会破坏轴对称磁场配置并增加高能离子的损失。RMP引起高能离子流失的机理已得到广泛研究，主要归因于共振效应。本文在扰动的非轴对称托卡马克基座上，我们分析性地导出了高能离子的引导中心运动方程，包括反弹/瞬态平均径向漂移速度和强径向电场修正的环形进动频率。数值求解了高能离子的损失时间，并详细分析了其参数依赖性。我们发现经过的高能离子无法从等离子体中逸出，而深陷的高能离子可以从等离子体中逸出。强大的径向电场在改变环向进动频率并改变环进动中起着重要作用。