Kinetic integrated modeling of plasma heating in tokamaks

Plasma heating and current drive by waves, neutral beam, and fusion reaction cause deformation of momentum distribution function of heated species. The deformation affects the heating, the loss mechanism, and the radial transport of energetic ions. The fusion reaction rate and the propagation of RF electric field is also influenced by the deformation. Therefore self-consistent heating analysis including the deformation of distribution function is required for quantitative analysis. In the present analysis, the deformation of the distribution function and the effect of radial diffusion during heating in tokamak plasmas are studied using integrated tokamak modeling code TASK and its components TASK/FP and TASK/WM. The newly extended bounce averaged Fokker-Planck component TASK/FP implements relativistic and energy conservative collision model, and it enables us to solve the Fokker-Planck equation for each species simultaneously. Using the integrated code TASK, multi-species plasma heating is analyzed and the effect of radial diffusion models are examined. (author)