Acceleration of dust particles by vortex ring

TL;DR

This paper demonstrates how nonlinear interactions in dusty plasma generate vortex rings that can accelerate dust particles, potentially useful for dust control in tokamak plasmas.

Contribution

It introduces a novel mechanism where nonlinear EM wave interactions produce vortex rings that accelerate dust particles without rotation, unlike traditional vortices.

Findings

Vortex rings are generated by nonlinear EM interactions in dusty plasma.

Dust particles are accelerated to form non-relativistic jets.

Potential application in dust acceleration in tokamak plasmas.

Abstract

It is shown that nonlinear interaction between large amplitude circularly polarized EM wave and dusty plasma leads to a nonstationary ponderomotive force which in turn produces a vortex ring, and magnetic field. Then the ensuing vortex ring in the direction of propagation of the pump wave can accelerate the micron-size dust particles which are initially at rest and eventually form a non relativistic dust jet. This effect is purely nonstationary and unlike linear vortices, dust particles do not rotate here. Specifically, it is pointed out that the vortex ring or closed filament can become potential candidate for the acceleration of dust in tokamak plasmas.