Multifaceted asymmetric radiation from the edge suppression by external edge heating

A linear, fluid model stability analysis of a radiative plasma mantle reveals that the impurity density limit for the onset of multifaceted asymmetric radiation from the edge (MARFE) in tokamaks can be increased by external heating of the radiative mantle at the plasma edge. The required injected power is estimated to be a few MW for present experiments and a few tens of MW for future reactors. copyright 1997 American Institute of Physics