Simulation Study of Toroidal Shear Flow Generation by a Local ICRF Heating

The toroidal shear flow generation by a local ICRF heating is studied using GNET code, in which the drift kinetic equation is solved in 5D phase-space. Verification of the Ohkawa model [T. Ohkawa and Miller, Phys. Plasmas 12(2005) 094506.] predicting the toroidal shear flow generation is done including the finite orbit effect of energetic ions in a tokamak configuration. The Alcator C-mod plasma is assumed as a first step. A co-directional toroidal flow outside of the power absorption region (resonance position) is observed. The dominant part of toroidal flow dose not depend on the sign k|| and this fact indicates that the driving mechanism of the dominant part is different from that proposed by the Ohkawa model.