The anomalous transport caused by particles transverse drift

The plasma anomalous transport is analyzed form the particles transverse drift in the system of magnetic surfaces disrupted by a stochastic perturbation of the magnetic field. In the ergodic region, the motion equation of particles can be written the form of Langevin equation, and the diffusion coefficient Dperpendicular can be obtained in the Fokker-Planck model. The Dperpendicular obtained in this way have the similar form and same order as comparison with that derived by the diffusion of the field lines in the quasilinear approximation. The two Dperpendicular's just supplement each other and only when combined into one the final result is the complete one. (author). 6 refs, 6 figs