Full wave modelling of lower hybrid current drive in tokamaks

摘要

Full wave calculations based on the use of eikonal trial functions that are locally solutions of the homogeneous problem are carried out for solving the lower hybrid(LH)current drive problem in tokamaks, when geometrical optics assumptions are no longer valid in the descriptin of the wave dynamics. The LH power deposition profile as well as the non-inductive driven current are determined self-consistently with a two dimensional(2-D)relativistic Fokker-Planck solver. The first consistent simulations are performance for the high aspect ratio tokamak TRIAM-1M, when the toroidal n_|| upshift is bounded and insufficient to bridge the large spectral gap and cause wave damping.