Tripolar vortices associated with toroidal ion temperature gradient modes in a magnetoplasma with sheared flows

摘要

A system of nonlinear equations for low-frequency toroidal ion-temperature-gradient modes in a nonuniform magnetoplasma with sheared plasma flow is presented. For some specific profiles of the equilibrium density, the ion temperature and sheared plasma flows, the nonlinear equations admit a tripolar vortex. The numerical results show a negative potential vortex core between the lobs of a dipole-like structure which has a positive value of the potential. (C) 2001 American Institute of Physics. [References: 17]