Effect of ICRF heating on single particle confinement in Tokamaks

The simultaneous effect of ion heating and spatial diffusion due to ICRF heating in tokamak geometry is investigated from the single particle viewpoint. A set of finite difference equations which connect the magnetic moment, and phase between successive resonances are used to describe the nonadiabatic jumps produced by the RF at the resonance layer. The topology of the tokamak orbits (passing, trapped) is explicitly retained in the mapping equations. The effect of collisions is treated by a Monte-Carlo procedure that contains the slowing down and the pitch angle scattering of the minority protons with a deuterium background