Simulation of ion-cyclotron-like modes in a magnetoplasma with transverse inhomogeneous electric field

Physics

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Earth Magnetosphere, Electric Fields, Ion Cyclotron Radiation, Magnetohydrodynamic Stability, Plasma Turbulence, Kelvin-Helmholtz Instability, Plasma Layers, Shock Waves

Scientific paper

The new kinetic ion-cyclotronlike (IC-like) instability driven by a localized electric field perpendicular to the ambient magnetic field is investigated using particle simulation. The existence of the new mode is demonstrated and the mode is distinguished from the well-known Kelvin-Helmholtz branch and the kinetic modification of this branch. The issue of the initial loading of particles in phase space in the simulation is clarified. The simulation results show that the growing ion waves are associated with the small vortices in the linear state, which evolve into a nonlinear stage dominated by large vortices with lower frequencies.

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