Nonlinear evolution of beam-plasma instability in inhomogeneous medium
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/108974 |
Resumo: | The problem of electron-beam propagation in inhomogeneous solar wind is intimately related to the solar type II and/or type III radio bursts. Many scientists have addressed this issue in the past bymeans of quasi-linear theory, but in order to fully characterize the nonlinear dynamics, one must employ weak-turbulence theory. Available numerical solutions of the weak-turbulence theory either rely on only one nonlinear process (either decay or scattering), or when both nonlinear terms are included, the inhomogeneity effect is generally ignored. The present paper reports the full solution of weak-turbulence theory that includes both decay and scattering processes, and also incorporating the effects of density gradient. It is found that the quasi-linear effect sufficiently accounts for the primary Langmuir waves, but to properly characterize the back-scattered Langmuir wave, which is important for eventual radiation generation, it is found that both nonlinear decay and scattering processes make comparable contributions. Such a finding may be important in the quantitative analysis of the plasma emission process with application to solar type II and/or type III radio bursts. |
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Ziebell, Luiz FernandoYoon, Peter H.Pavan, JoelGaelzer, Rudi2015-01-15T02:15:10Z20110004-637Xhttp://hdl.handle.net/10183/108974000771954The problem of electron-beam propagation in inhomogeneous solar wind is intimately related to the solar type II and/or type III radio bursts. Many scientists have addressed this issue in the past bymeans of quasi-linear theory, but in order to fully characterize the nonlinear dynamics, one must employ weak-turbulence theory. Available numerical solutions of the weak-turbulence theory either rely on only one nonlinear process (either decay or scattering), or when both nonlinear terms are included, the inhomogeneity effect is generally ignored. The present paper reports the full solution of weak-turbulence theory that includes both decay and scattering processes, and also incorporating the effects of density gradient. It is found that the quasi-linear effect sufficiently accounts for the primary Langmuir waves, but to properly characterize the back-scattered Langmuir wave, which is important for eventual radiation generation, it is found that both nonlinear decay and scattering processes make comparable contributions. Such a finding may be important in the quantitative analysis of the plasma emission process with application to solar type II and/or type III radio bursts.application/pdfengThe astrophysical journal. Bristol. Vol. 727, no. 1 (Jan. 2011), 16, 8 p.Plasmas astrofisicosMateria interplanetariaFontes de plasmaTurbulência em plasmasVento solarInstabilitiesPlasmasSolar windTurbulenceWavesNonlinear evolution of beam-plasma instability in inhomogeneous mediumEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000771954.pdf000771954.pdfTexto completo (inglês)application/pdf1222320http://www.lume.ufrgs.br/bitstream/10183/108974/1/000771954.pdf88f98c39e853319cc52e6a5b93aa5982MD51TEXT000771954.pdf.txt000771954.pdf.txtExtracted Texttext/plain33686http://www.lume.ufrgs.br/bitstream/10183/108974/2/000771954.pdf.txte8e006d8a9fe6abb8bbcad0c470ea645MD52THUMBNAIL000771954.pdf.jpg000771954.pdf.jpgGenerated Thumbnailimage/jpeg2146http://www.lume.ufrgs.br/bitstream/10183/108974/3/000771954.pdf.jpgadb35e81710e0b45aa451535363c67c7MD5310183/1089742023-09-24 03:38:05.60537oai:www.lume.ufrgs.br:10183/108974Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-09-24T06:38:05Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Nonlinear evolution of beam-plasma instability in inhomogeneous medium |
title |
Nonlinear evolution of beam-plasma instability in inhomogeneous medium |
spellingShingle |
Nonlinear evolution of beam-plasma instability in inhomogeneous medium Ziebell, Luiz Fernando Plasmas astrofisicos Materia interplanetaria Fontes de plasma Turbulência em plasmas Vento solar Instabilities Plasmas Solar wind Turbulence Waves |
title_short |
Nonlinear evolution of beam-plasma instability in inhomogeneous medium |
title_full |
Nonlinear evolution of beam-plasma instability in inhomogeneous medium |
title_fullStr |
Nonlinear evolution of beam-plasma instability in inhomogeneous medium |
title_full_unstemmed |
Nonlinear evolution of beam-plasma instability in inhomogeneous medium |
title_sort |
Nonlinear evolution of beam-plasma instability in inhomogeneous medium |
author |
Ziebell, Luiz Fernando |
author_facet |
Ziebell, Luiz Fernando Yoon, Peter H. Pavan, Joel Gaelzer, Rudi |
author_role |
author |
author2 |
Yoon, Peter H. Pavan, Joel Gaelzer, Rudi |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Ziebell, Luiz Fernando Yoon, Peter H. Pavan, Joel Gaelzer, Rudi |
dc.subject.por.fl_str_mv |
Plasmas astrofisicos Materia interplanetaria Fontes de plasma Turbulência em plasmas Vento solar |
topic |
Plasmas astrofisicos Materia interplanetaria Fontes de plasma Turbulência em plasmas Vento solar Instabilities Plasmas Solar wind Turbulence Waves |
dc.subject.eng.fl_str_mv |
Instabilities Plasmas Solar wind Turbulence Waves |
description |
The problem of electron-beam propagation in inhomogeneous solar wind is intimately related to the solar type II and/or type III radio bursts. Many scientists have addressed this issue in the past bymeans of quasi-linear theory, but in order to fully characterize the nonlinear dynamics, one must employ weak-turbulence theory. Available numerical solutions of the weak-turbulence theory either rely on only one nonlinear process (either decay or scattering), or when both nonlinear terms are included, the inhomogeneity effect is generally ignored. The present paper reports the full solution of weak-turbulence theory that includes both decay and scattering processes, and also incorporating the effects of density gradient. It is found that the quasi-linear effect sufficiently accounts for the primary Langmuir waves, but to properly characterize the back-scattered Langmuir wave, which is important for eventual radiation generation, it is found that both nonlinear decay and scattering processes make comparable contributions. Such a finding may be important in the quantitative analysis of the plasma emission process with application to solar type II and/or type III radio bursts. |
publishDate |
2011 |
dc.date.issued.fl_str_mv |
2011 |
dc.date.accessioned.fl_str_mv |
2015-01-15T02:15:10Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/108974 |
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0004-637X |
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000771954 |
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url |
http://hdl.handle.net/10183/108974 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
The astrophysical journal. Bristol. Vol. 727, no. 1 (Jan. 2011), 16, 8 p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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