Effect of resonant magnetic perturbations on plasma rotation on J-TEXT tokamak

The plasma rotation in edge region has been studied with the locked 2/1 and 3/1 magnetic island excited by the magnetic resonant perturbations respectively on J-TEXT tokamak. In the case of 2/1 magnetic island, it is observed that the toroidal rotation of carbon V changes significantly during the mode locking, shifting from the counter-current to co-current direction. The variation of the rotation of carbon V is found to depend on the RMP current and phase. In the case of 3/1 magnetic island, the locked mode has a relatively small impact on the rotation of carbon V, but a significant impact on the rotation of carbon III, which locates in the outer region. The shift of toroidal rotation of carbon III is normally in co-current direction. However, in specific phase, the counter-current direction shift of toroidal rotation of carbon III is also observed. It is suggested that the effect on the localized rotation might be contrary in and out of the magnetic island. The combined impacts of the magnetic islands and the understanding of the roles on plasma rotation will be presented and discussed in the conference.