Nonlinear development of weak beam-plasma instability
Autor(a) principal: | |
---|---|
Data de Publicação: | 2001 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/141200 |
Resumo: | Nonlinear interactions of tenuous electron beam, background, unmagnetized plasma, and self-consistently generated Langmuir and ion-sound waves are analyzed in the framework of plasma weak turbulence kinetic theory. Full numerical solutions of the complete weak turbulence equations are obtained for the first time, which show the familiar plateau formation in the electron beam distribution and concomitant quasi-saturation of primary Langmuir waves, followed by fully nonlinear processes which include three-wave decay and induced-scattering processes. A detailed analysis reveals that the scattering off ions is an important nonlinear process which leads to prominent backscattered and long-wavelength Langmuir wave components. However, it is found that the decay process is also important, and that the nonlinear development of weak Langmuir turbulence critically depends on the initial conditions. Special attention is paid to the electron-to-ion temperature ratio, Te /Ti , and the initial perturbation level. It is found that higher values of Te /Ti promote the generation of backscattered Langmuir wave component, and that a higher initial wave intensity suppresses the backscattered component while significantly enhancing the long-wavelength Langmuir wave component. |
id |
UFRGS-2_cc7b03c3cc782ac649c31c93417b2cc6 |
---|---|
oai_identifier_str |
oai:www.lume.ufrgs.br:10183/141200 |
network_acronym_str |
UFRGS-2 |
network_name_str |
Repositório Institucional da UFRGS |
repository_id_str |
|
spelling |
Ziebell, Luiz FernandoGaelzer, RudiYoon, Peter H.2016-05-17T02:07:19Z20011070-664Xhttp://hdl.handle.net/10183/141200000306083Nonlinear interactions of tenuous electron beam, background, unmagnetized plasma, and self-consistently generated Langmuir and ion-sound waves are analyzed in the framework of plasma weak turbulence kinetic theory. Full numerical solutions of the complete weak turbulence equations are obtained for the first time, which show the familiar plateau formation in the electron beam distribution and concomitant quasi-saturation of primary Langmuir waves, followed by fully nonlinear processes which include three-wave decay and induced-scattering processes. A detailed analysis reveals that the scattering off ions is an important nonlinear process which leads to prominent backscattered and long-wavelength Langmuir wave components. However, it is found that the decay process is also important, and that the nonlinear development of weak Langmuir turbulence critically depends on the initial conditions. Special attention is paid to the electron-to-ion temperature ratio, Te /Ti , and the initial perturbation level. It is found that higher values of Te /Ti promote the generation of backscattered Langmuir wave component, and that a higher initial wave intensity suppresses the backscattered component while significantly enhancing the long-wavelength Langmuir wave component.application/pdfengPhysics of plasmas. Melville. Vol. 8, no. 9 (Sept. 2001), p. 3982-3995Instabilidade em plasmasTeoria cinetica de plasmasNonlinear development of weak beam-plasma instabilityEstrangeiroinfo: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:UFRGSORIGINAL000306083.pdf000306083.pdfTexto completo (inglês)application/pdf559308http://www.lume.ufrgs.br/bitstream/10183/141200/1/000306083.pdf4e512217e22902c973bfc1ed55f6a27dMD51TEXT000306083.pdf.txt000306083.pdf.txtExtracted Texttext/plain64576http://www.lume.ufrgs.br/bitstream/10183/141200/2/000306083.pdf.txtf25898d968d3855ed1d2a58c8b7fc716MD52THUMBNAIL000306083.pdf.jpg000306083.pdf.jpgGenerated Thumbnailimage/jpeg2091http://www.lume.ufrgs.br/bitstream/10183/141200/3/000306083.pdf.jpgad88e1d4df0393c1e9ae463870dd2489MD5310183/1412002023-09-24 03:38:04.905484oai:www.lume.ufrgs.br:10183/141200Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-09-24T06:38:04Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Nonlinear development of weak beam-plasma instability |
title |
Nonlinear development of weak beam-plasma instability |
spellingShingle |
Nonlinear development of weak beam-plasma instability Ziebell, Luiz Fernando Instabilidade em plasmas Teoria cinetica de plasmas |
title_short |
Nonlinear development of weak beam-plasma instability |
title_full |
Nonlinear development of weak beam-plasma instability |
title_fullStr |
Nonlinear development of weak beam-plasma instability |
title_full_unstemmed |
Nonlinear development of weak beam-plasma instability |
title_sort |
Nonlinear development of weak beam-plasma instability |
author |
Ziebell, Luiz Fernando |
author_facet |
Ziebell, Luiz Fernando Gaelzer, Rudi Yoon, Peter H. |
author_role |
author |
author2 |
Gaelzer, Rudi Yoon, Peter H. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Ziebell, Luiz Fernando Gaelzer, Rudi Yoon, Peter H. |
dc.subject.por.fl_str_mv |
Instabilidade em plasmas Teoria cinetica de plasmas |
topic |
Instabilidade em plasmas Teoria cinetica de plasmas |
description |
Nonlinear interactions of tenuous electron beam, background, unmagnetized plasma, and self-consistently generated Langmuir and ion-sound waves are analyzed in the framework of plasma weak turbulence kinetic theory. Full numerical solutions of the complete weak turbulence equations are obtained for the first time, which show the familiar plateau formation in the electron beam distribution and concomitant quasi-saturation of primary Langmuir waves, followed by fully nonlinear processes which include three-wave decay and induced-scattering processes. A detailed analysis reveals that the scattering off ions is an important nonlinear process which leads to prominent backscattered and long-wavelength Langmuir wave components. However, it is found that the decay process is also important, and that the nonlinear development of weak Langmuir turbulence critically depends on the initial conditions. Special attention is paid to the electron-to-ion temperature ratio, Te /Ti , and the initial perturbation level. It is found that higher values of Te /Ti promote the generation of backscattered Langmuir wave component, and that a higher initial wave intensity suppresses the backscattered component while significantly enhancing the long-wavelength Langmuir wave component. |
publishDate |
2001 |
dc.date.issued.fl_str_mv |
2001 |
dc.date.accessioned.fl_str_mv |
2016-05-17T02:07:19Z |
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/10183/141200 |
dc.identifier.issn.pt_BR.fl_str_mv |
1070-664X |
dc.identifier.nrb.pt_BR.fl_str_mv |
000306083 |
identifier_str_mv |
1070-664X 000306083 |
url |
http://hdl.handle.net/10183/141200 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physics of plasmas. Melville. Vol. 8, no. 9 (Sept. 2001), p. 3982-3995 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFRGS instname:Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS |
instname_str |
Universidade Federal do Rio Grande do Sul (UFRGS) |
instacron_str |
UFRGS |
institution |
UFRGS |
reponame_str |
Repositório Institucional da UFRGS |
collection |
Repositório Institucional da UFRGS |
bitstream.url.fl_str_mv |
http://www.lume.ufrgs.br/bitstream/10183/141200/1/000306083.pdf http://www.lume.ufrgs.br/bitstream/10183/141200/2/000306083.pdf.txt http://www.lume.ufrgs.br/bitstream/10183/141200/3/000306083.pdf.jpg |
bitstream.checksum.fl_str_mv |
4e512217e22902c973bfc1ed55f6a27d f25898d968d3855ed1d2a58c8b7fc716 ad88e1d4df0393c1e9ae463870dd2489 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS) |
repository.mail.fl_str_mv |
|
_version_ |
1801224900115955712 |