Statistical Aspects of Diffusion in Turbulent Plasmas

Abstract: In this work we address the closure issue in kinetic and fluid descriptions of turbulent plasmas. In fluid description contribution has been made to the nonlinear closure by Mattor and Parker [Phys. Rev. Lett. 79, 3419 (1997)]. It was generalized by taking into account effects of diffusion due to the background turbulence.

In kinetic description we have focused on the Fokker-Planck approach. Within this approach we developed non-Markovian quasilinear theory of particle diffusion in random fields. We have also made a contribution to the theory of Brownian motion of charged particle in constant external electric and magnetic fields. In connection with that, the theory of large-scale fluctuations in plasmas has been developed.