Articles: toroidal mode conversion in the ICRF

摘要

Mode conversion is studied in the ion cyclotron range of frequencies(ICRF), taking into account the toroidal geometry relevant for Tokamaks. The global wavefield obtained using the gyrokinetic toroidal PENN code illustrate how the fast wave propagates to the neighbourhood of the ion-ion hybrid resonance, where it is converted to a slow wave that deposits the wave energy through resonant Landau and cyclotron interactions with the particles. The power deposition profiles obtained are dramatically different from the toroidal resonance absorption, showing that Budden's fluid model is dramatically different in the torus.