A mixed ray tracing/full wave ICRH mode conversion model

Abstract

A mixed ray tracing/full wave code is presented. The adopted 1D full wave model gives a realistic description of the mode conversion in the ion-ion hybrid region as it accounts for temperature oblique incidence poloidal magnetic field and finite parallel electric effects. Each ray entering the confluence region is stopped and a full wave computation is subsequently made. After that, a set of subrays carrying the transmitted, reflected and converted power is relaunched. The code is suited to study scenarios where a non-negligible fraction of the power carried by the fast wave is lost to the ion Bernstein or the ion cyclotron wave.