Mode-coupling and nonlinear Landau damping effects in auroral Farley-Buneman turbulence
Abstract
The fundamental problem of Farley-Buneman turbulence in the auroral -region has been discussed and debated extensively in the past two decades. In the present paper we intend to clarify the different steps that the auroral -region plasma has to undergo before reaching a steady state. The mode-coupling calculation, for Farley-Buneman turbulence, is developed in order to place it in perspective and to estimate its magnitude relative to the anomalous effects which arise through the nonlinear wave-particle interaction. This nonlinear effect, known as nonlinear ``Landau damping'' is due to the coupling of waves which produces other waves which in turn lose energy to the bulk of the particles by Landau damping. This leads to a decay of the wave energy and consequently a heating of the plasma. An equation governing the evolution of the field spectrum is derived and a physical interpration for each of its terms is provided.
Keywords
Cite
@article{arxiv.physics/9810062,
title = {Mode-coupling and nonlinear Landau damping effects in auroral Farley-Buneman turbulence},
author = {Abdelaziz M. Hamza},
journal= {arXiv preprint arXiv:physics/9810062},
year = {2015}
}