Abstract
In order to diverge the enormous heat flux on the divertor plate in tokamak fusion reactor, new methods by using kinds of perturbed magnetic field made by either periodically deformed divertor coil or a set of in-vessel coils are proposed. By tracing magnetic field lines in JT-60 configuration, we confirmed that the nonaxisymmetric perturbed magnetic field can make a stochastic edge field, and that a toroidally rotating perturbed field can sweep a separatrix on the plate by about 10cm in width. In the latter case, a penetration of rapidly changing A. C. perturbation field into the confiment region can be avoided by a plasma skin effect.
