ELM suppression and flow damping with n=1 RMP fields in tokamaks plasmas

Controling large edge localized modes (ELMs) is critical for tokamaks operating in H-mode, due to potentially severe consequences on material damages caused by ELM bursts in future large scale devices such as ITER. Resonant magnetic perturbation (RMP) has been extensively applied to mitigate or suppress ELMs. In this work, we report two new recent results on the effect of the n=1 (n is the toroidal mode number) RMP fields on ELMs and the associated plasma transport. One is the experimental result on the HL-2A tokamak, where large type-I ELMs were for the first time on this device suppressed by the applied n=1 RMP. The other is the toroidal modeling study on the plasma core flow damping by the applied n=1 RMP, with computational results quantitatively agreeing with experiments in ASDEX Upgrade.