Stabilization of the resistive wall mode instability by trapped energetic particles

摘要

A theoretical model for investigating the effect of the trapped energetic particles (EPs) on the resistive wall mode (RWM) instability is proposed. The results demonstrate that EPs have a dramatic stabilizing effect on the RWM because of resonance between the mode and the precession motion of EPs. The plasma rotation can enhance this stabilization. In addition, when the EPs beta exceeds a critical value,a fishbone-like bursting mode (FLM) branch with external kink eigenstructure can exist. The characteristics of FLM are qualitatively consistent with the experimental observations [Phys. Rev. Lett. 103, 045001 (2009)].