Simulation of fast wave current drive in tokamaks in the ion cyclotron frequency range

摘要

To perform simulations of radio-frequency current drive in tokamaks in the ion cyclotron range of frequencies, the wave fields evaluated by the toroidal full-wave code TORIC have been used to build the quasilinear electron diffusion coefficient, which, in turn, is used by a recently developed solver of the bounce-averaged quasilinear Fokker-Planck kinetic equation, QLEFOPS. Applications to possible fast wave current drive experiments in ASDEX Upgrade are presented. The effects of varying the target electron temperature, the background ohmic current, and, Within the relatively limited possibilities, the directivity of the antenna have been investigated.