Neoclassical diffusion in a turbulent plasma
Smolyakov A. I., Yushmanov P. N.
A new diffusion mechanism is analyzed. It arises when electrostatic fluctuations and a toroidal drift of particles are taken into account simultaneously. The diffusion results from transitions of particles from trapped to untrapped trajectories. The diffusion coefficient is slightly higher than that in the neoclassical plateau regime, regardless of the collision rate.