Fusion Science and Technology / Volume 57 / Number 2T / February 2010 / Pages 269-276
Edge Physics and Plasma-Wall Interactions / Proceedings of the Ninth Carolus Magnus Summer School on Plasma and Fusion Energy Physics
The basic concepts related to the phenomenon of field line stochastization through external magnetic perturbations, e.g., resonant magnetic surfaces, magnetic islands, overlap of island chains, stochastic instability, Kolmogorov length, field line diffusivity, etc., are discussed. Different models for description of transport of heat, background and impurity particles in stochastic magnetic field are presented. Stochastization impacts on the plasma rotation, radial electric field and electromagnetic fluctuations in the plasma are described. Mechanisms responsible for mitigation of the edge localized modes, ELMs, are introduced.