Measurements of Beam Relaxation Length in an Electron Beam Plasma Experiment
Autor(a) principal: | |
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Data de Publicação: | 1997 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Journal of Physics |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97331997000400009 |
Resumo: | A double plasma device with multipole surface magnetic confinement is used to investigate the beam relaxation length of beam plasma interaction as a function of the beam plasma density ratio, 10-4 <FONT FACE="Symbol">£ </font>nb/no <FONT FACE="Symbol">£</font> 2 x 10-2, and beam energy Wb <FONT FACE="Symbol">£</font> 200 eV in an unmagnetized plasma, using argon and helium gases. The measured relaxation lengths show a transition from quasi-linear to nonlinear regime, as predicted by Galeev et al., 1977. There is evidence that for some range of the beam plasma parameters the threshold for modulational instability is reached. In that case it is possible to observe that the beam propagates relatively unperturbed for larger distances than the ones predicted by quasi-linear theory. |
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oai:scielo:S0103-97331997000400009 |
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SBF-2 |
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Brazilian Journal of Physics |
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|
spelling |
Measurements of Beam Relaxation Length in an Electron Beam Plasma ExperimentA double plasma device with multipole surface magnetic confinement is used to investigate the beam relaxation length of beam plasma interaction as a function of the beam plasma density ratio, 10-4 <FONT FACE="Symbol">£ </font>nb/no <FONT FACE="Symbol">£</font> 2 x 10-2, and beam energy Wb <FONT FACE="Symbol">£</font> 200 eV in an unmagnetized plasma, using argon and helium gases. The measured relaxation lengths show a transition from quasi-linear to nonlinear regime, as predicted by Galeev et al., 1977. There is evidence that for some range of the beam plasma parameters the threshold for modulational instability is reached. In that case it is possible to observe that the beam propagates relatively unperturbed for larger distances than the ones predicted by quasi-linear theory.Sociedade Brasileira de Física1997-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97331997000400009Brazilian Journal of Physics v.27 n.4 1997reponame:Brazilian Journal of Physicsinstname:Sociedade Brasileira de Física (SBF)instacron:SBF10.1590/S0103-97331997000400009info:eu-repo/semantics/openAccessPrado,Fábio doAlves,M. VirgíniaDallaqua,Renato S.Karfidov,Dmitryeng1999-06-14T00:00:00Zoai:scielo:S0103-97331997000400009Revistahttp://www.sbfisica.org.br/v1/home/index.php/pt/ONGhttps://old.scielo.br/oai/scielo-oai.phpsbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br1678-44480103-9733opendoar:1999-06-14T00:00Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF)false |
dc.title.none.fl_str_mv |
Measurements of Beam Relaxation Length in an Electron Beam Plasma Experiment |
title |
Measurements of Beam Relaxation Length in an Electron Beam Plasma Experiment |
spellingShingle |
Measurements of Beam Relaxation Length in an Electron Beam Plasma Experiment Prado,Fábio do |
title_short |
Measurements of Beam Relaxation Length in an Electron Beam Plasma Experiment |
title_full |
Measurements of Beam Relaxation Length in an Electron Beam Plasma Experiment |
title_fullStr |
Measurements of Beam Relaxation Length in an Electron Beam Plasma Experiment |
title_full_unstemmed |
Measurements of Beam Relaxation Length in an Electron Beam Plasma Experiment |
title_sort |
Measurements of Beam Relaxation Length in an Electron Beam Plasma Experiment |
author |
Prado,Fábio do |
author_facet |
Prado,Fábio do Alves,M. Virgínia Dallaqua,Renato S. Karfidov,Dmitry |
author_role |
author |
author2 |
Alves,M. Virgínia Dallaqua,Renato S. Karfidov,Dmitry |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Prado,Fábio do Alves,M. Virgínia Dallaqua,Renato S. Karfidov,Dmitry |
description |
A double plasma device with multipole surface magnetic confinement is used to investigate the beam relaxation length of beam plasma interaction as a function of the beam plasma density ratio, 10-4 <FONT FACE="Symbol">£ </font>nb/no <FONT FACE="Symbol">£</font> 2 x 10-2, and beam energy Wb <FONT FACE="Symbol">£</font> 200 eV in an unmagnetized plasma, using argon and helium gases. The measured relaxation lengths show a transition from quasi-linear to nonlinear regime, as predicted by Galeev et al., 1977. There is evidence that for some range of the beam plasma parameters the threshold for modulational instability is reached. In that case it is possible to observe that the beam propagates relatively unperturbed for larger distances than the ones predicted by quasi-linear theory. |
publishDate |
1997 |
dc.date.none.fl_str_mv |
1997-12-01 |
dc.type.driver.fl_str_mv |
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://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97331997000400009 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97331997000400009 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-97331997000400009 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
dc.source.none.fl_str_mv |
Brazilian Journal of Physics v.27 n.4 1997 reponame:Brazilian Journal of Physics instname:Sociedade Brasileira de Física (SBF) instacron:SBF |
instname_str |
Sociedade Brasileira de Física (SBF) |
instacron_str |
SBF |
institution |
SBF |
reponame_str |
Brazilian Journal of Physics |
collection |
Brazilian Journal of Physics |
repository.name.fl_str_mv |
Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF) |
repository.mail.fl_str_mv |
sbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br |
_version_ |
1754734858384441344 |