Electrostatic chains driven by nonuniform lower hybrid pump

Abstract

We study the parametric interaction of a nonuniform long-wavelength lower hybrid (LH) wave propagating almost perpendicularly to the magnetic field lines, with low frequency density perturbations. Neglecting perturbations of the strong LH wave acting as a pump, we show that for a specific profile of its amplitude, a LH pump can excite electrostatic vortex chains propagating perpendicularly both to the magnetic field and the direction of the pump gradient.

Acoustic-gravity nonlinear structures

“…The above system of equations was studied in Vranješ and Jovanović (1997), where a numerical solution was found in the form of two parallel vortex chains, shifted by a halfwavelength relative to each other. The asymptotic behaviour of the unperturbed quantities, for z → ±∞, are determined from Eqs.…”