Direct toroidal torque driven by ICRF heating and its dependence on the plasma rotation

The contribution of ICRF waves as source of direct external toroidal torque is investigated and shown to be too small to be the main mechanism behind the common experimental observations of plasma rotation in the presence of ICRF-heating. In particular, the impact of plasma rotation on the direct ICRF torque is addressed with the outcome that plasma rotation mainly influences the profiles of the ICRF torque and not its total value.