Effect of poloidal magnetic field on the propagation characteristics of ion Bernstein waves in the ion cyclotron resonance frequency range for tokamak

摘要

For radio frequency heating, the main requirement is that it should be possible to launch a wave from the plasma edge, get coupled to the plasma, propagate with minimum losses up to the core and then deposit the power at the required position in the plasma correspond- ing to a cyclotron resonance layer. The absorption and propagation of the waves for radio-frequency heating in the ion cyclotron range of frequencies have been Investigated using kinetic theory to take into account the effect of finite Larmor radius. In general, the dispersion relation contains two modes, one Corresponding to cold plasma wave and another one corresponding to ion Bernstein wave, Sy, W N-C et al [1] have developed a dispersion Relation for tokamak plasmas taking into account the two cold plasma waves and the ion Bernstein wave. However, they have neglected the effect Of poloidal magnetic field on the propagation characteristics.