Abstract

Kinetic or slow Alfv\'en waves, which can be driven in a tokamak plasma by mode conversion, were earlier shown to be useful for wave current drive and plasma heating, for creating reversed shear configurations, and for the formation and maintenance of edge and internal transport barriers due to their small radial localizations. Kinetic Alfv\'en waves can also induce radial electric fields and provide a mechanism for squeezing the banana orbits of ions in weakly collisional plasmas of tokamaks. It is shown that the radial electric field, induced by Alfv\'en waves, under some conditions has a nonlinear dependence on the radio-frequency absorbed power.

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