Recent Progress in Linear and Nonlinear Studies of Toroidal Alfv en Eigenmode
Authors: G. Y. Fu, et al.
TAE modes are studied in linear and nonlinear regimes using several kinetic/MHD hybrid models. It is shown that the stability of TAE mode is largely determined by its radial mode structure. The calculated stability thresholds are correlated well with observations, including the recently observed alpha-driven TAE modes in the TFTR DT experiments. In the nonlinear regime, quasilinear simulations with multiple modes show that the saturation level is enhanced by nonlinear wave-particle resonance overlapping when the linear growth rate ex- ceeds a critical value. A fully self-consistent df noise reduction method for the 3D particle/MHD hybrid model is developed.