Vortices in nonuniform upper-hybrid field

Abstract

The possibility of formation of smooth double-vortices due to modulational instability of drift waves produced by a localized pump at the upper-hybrid frequency is investigated. It is shown that the density profile of vortices obtained in this way can be described by analytic functions in all finite part of space. Their characteristic size is much smaller than the size of pump localization region and is completely determined by intensity and spatial length of the upper-hybrid pump.