RADIAL ELECTRIC FIELD DYNAMICS IN THE EDGE WITH ERGODISATION IN TOKAMAK TF-2

摘要

There is a need for improvement in producing uniform power load and particle flux to thernwall and in the avoidance of locked modes in tokamaks. It may be assisted by producing anrnergodic magnetic divertor and an ergodic magnetic limiter (EML) in the edge that was testedrnin Hybtok-II, TEXT and TORE SUPRA[1-3]. In a tokamak the external radial magneticrnperturbation (stochastic boundary) is generated by a specific set of helical coils locatedrnoutside the vacuum vessel. The volume of open field lines connected to the wall is referred tornas the divertor volume. At the moment the issue is whether the features of transport resultrnfrom the properties of the magnetic perturbation or from a change in radial electric fields andrnturbulence?