Magnetic field structure and transport induced by the ergodic divertor of Tore Supra

The quasilinear analysis of transport in stochastic fields (including the electric perturbation), which is to be tested by the ergodic divertor experiments on Tore Supra, is discussed. On Tore Supra configuration, the magnetic connection is due to a resonant magnetic perturbation, which creates a stochastic layer between the hot plasma and the wall. The coils, creating the magnetic perturbation, consist in 6 identical modules 60 degrees apart, in the toroidal direction. A radial perturbation of the magnetic field allows a radial transport of energy through the parallel motion of the electrons. Concerning plasma connection, it is shown that the ergodic layer can maintain a constant pressure profile