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Electrostatic wave breaking limit in a cold electronegative plasma with non-Maxwellian electrons

A one-dimensional multifluid hydrodynamic model has been adopted as basis for an investigation of the role of suprathermal electrons on the wave breaking amplitude limit for electrostatic excitations propagating in an electronegative plasma. A three-component plasma is considered, consisting of two...

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Autores principales: Elkamash, I. S., Kourakis, I.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7969780/
https://www.ncbi.nlm.nih.gov/pubmed/33731733
http://dx.doi.org/10.1038/s41598-021-85228-z
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author Elkamash, I. S.
Kourakis, I.
author_facet Elkamash, I. S.
Kourakis, I.
author_sort Elkamash, I. S.
collection PubMed
description A one-dimensional multifluid hydrodynamic model has been adopted as basis for an investigation of the role of suprathermal electrons on the wave breaking amplitude limit for electrostatic excitations propagating in an electronegative plasma. A three-component plasma is considered, consisting of two inertial cold ion populations of opposite signs, evolving against a uniform background of (non-Maxwellian) electrons. A kappa-type (non-Maxwellian) distribution function is adopted for the electrons. By employing a traveling wave approximation, the first integral for the fluid-dynamical system has been derived, in the form of a pseudo-energy balance equation, and analyzed. The effect of intrinsic plasma parameters (namely the ion density ratio, the ion mass ratio, and the superthermal index of the nonthermal electrons) on the wave breaking amplitude limit is explored, by analyzing the phase space topology of the associated pseudopotential function. Our results are relevant to particle acceleration in Space environments and to recent experiments based on plasma-based accelerator schemes, where the simultaneous presence of negative ions and nonthermal electrons may be observed.
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spelling pubmed-79697802021-03-19 Electrostatic wave breaking limit in a cold electronegative plasma with non-Maxwellian electrons Elkamash, I. S. Kourakis, I. Sci Rep Article A one-dimensional multifluid hydrodynamic model has been adopted as basis for an investigation of the role of suprathermal electrons on the wave breaking amplitude limit for electrostatic excitations propagating in an electronegative plasma. A three-component plasma is considered, consisting of two inertial cold ion populations of opposite signs, evolving against a uniform background of (non-Maxwellian) electrons. A kappa-type (non-Maxwellian) distribution function is adopted for the electrons. By employing a traveling wave approximation, the first integral for the fluid-dynamical system has been derived, in the form of a pseudo-energy balance equation, and analyzed. The effect of intrinsic plasma parameters (namely the ion density ratio, the ion mass ratio, and the superthermal index of the nonthermal electrons) on the wave breaking amplitude limit is explored, by analyzing the phase space topology of the associated pseudopotential function. Our results are relevant to particle acceleration in Space environments and to recent experiments based on plasma-based accelerator schemes, where the simultaneous presence of negative ions and nonthermal electrons may be observed. Nature Publishing Group UK 2021-03-17 /pmc/articles/PMC7969780/ /pubmed/33731733 http://dx.doi.org/10.1038/s41598-021-85228-z Text en © The Author(s) 2021 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Elkamash, I. S.
Kourakis, I.
Electrostatic wave breaking limit in a cold electronegative plasma with non-Maxwellian electrons
title Electrostatic wave breaking limit in a cold electronegative plasma with non-Maxwellian electrons
title_full Electrostatic wave breaking limit in a cold electronegative plasma with non-Maxwellian electrons
title_fullStr Electrostatic wave breaking limit in a cold electronegative plasma with non-Maxwellian electrons
title_full_unstemmed Electrostatic wave breaking limit in a cold electronegative plasma with non-Maxwellian electrons
title_short Electrostatic wave breaking limit in a cold electronegative plasma with non-Maxwellian electrons
title_sort electrostatic wave breaking limit in a cold electronegative plasma with non-maxwellian electrons
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7969780/
https://www.ncbi.nlm.nih.gov/pubmed/33731733
http://dx.doi.org/10.1038/s41598-021-85228-z
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