non-propagating electric and density structures formed through non-linear interaction of alfvén waves

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ID: 182308
2012
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Abstract
In the auroral zone of the Earth, the electron acceleration by Alfvén waves is sometimes seen as a precursor of the non-propagating acceleration structures. In order to investigate how Alfvén waves could generate non-propagating electric fields, a series of simulations of counter-propagating waves in a homogeneous medium is presented. The waves propagate along the ambient magnetic field direction. It is shown that non-propagating electric fields are generated at the locus of the Alfvén waves crossing. These electric fields have a component orientated along the direction of the ambient magnetic field, and they generate a significant perturbation of the plasma density. The non-linear interaction of down and up-going Alfvén waves might be a cause of plasma density fluctuations (with gradients along the magnetic field) on a scale comparable to those of the Alfvén wavelengths. The present paper is mainly focused on the creation process of the non-propagating parallel electric field.
Reference Key
mottez2012annalesnon-propagating Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;F. Mottez
Journal journal of food measurement and characterization
Year 2012
DOI
10.5194/angeo-30-81-2012
URL
https://www.ann-geophys.net/30/81/2012/angeo-30-81-2012.pdf
Keywords
cosmic physics sciencephysicsgeophysics

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