Neoclassical toroidal plasma viscosity in bounce-transit and drift resonance regimes in tokamaks

Abstract Neoclassical toroidal plasma viscosity in the bounce-transit and drift resonance regimes is calculated using a version of kinetic equation that encompasses physics nonlinear trapping quasilinear plateau tokamaks. It demonstrated mirror-force like term controls transition between these two regimes. When effective collision frequency larger than mirroring or bounce frequency, regime prevails; otherwise, reigns. The demonstration accomplished by Eulerian approach beyond grasp method integration along unperturbed orbit solving equation. neoclassical calculated. Approximate analytic expressions for include asymptotic limits are presented to facilitate thermal energetic alpha particle transport modeling