Influence Of Resonance Magnetic Perturbation On The Asymmetric Magnetic Perturbation Induced Double Tearing Modes

In this paper, we have studied the influence of resonance magnetic perturbation (RMP) on the double tearing modes induced by asymmetric magnetic perturbation in a 2D geometry based on the MHD model. After studying the four cases, we have found that with RMP, no matter which rational surface the magnetic perturbation is in: (1) the width of the outer magnetic island will be greater than that of the inner magnetic island at the end of the mode evolution; (2) The influence of the RMP on the outer magnetic island is far greater than the inner magnetic island; (3) RMP will shorten the time required for the magnetic island to reach saturation.