Spontaneous emission of electromagnetic radiation in turbulent plasmas

Detalhes bibliográficos
Autor(a) principal: Ziebell, Luiz Fernando
Data de Publicação: 2014
Outros Autores: Yoon, Peter H., Simões Júnior, Fernando Jaques Ruiz, Gaelzer, Rudi, Pavan, Joel
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/142378
Resumo: Known radiation emission mechanisms in plasmas include bremmstrahlung (or free-free emission), gyro- and synchrotron radiation, cyclotron maser, and plasma emission. For unmagnetized plasmas, only bremmstrahlung and plasma emissions are viable. Of these, bremmstrahlung becomes inoperative in the absence of collisions, and the plasma emission requires the presence of electron beam, followed by various scattering and conversion processes. The present Letter proposes a new type of radiation emission process for plasmas in a state of thermodynamic quasi-equilibrium between particles and enhanced Langmuir turbulence. The radiation emission mechanism proposed in the present Letter is not predicted by the linear theory of thermal plasmas, but it relies on nonlinear wave-particle resonance processes. The electromagnetic particle-in-cell numerical simulation supports the new mechanism.
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spelling Ziebell, Luiz FernandoYoon, Peter H.Simões Júnior, Fernando Jaques RuizGaelzer, RudiPavan, Joel2016-06-09T02:08:24Z20141070-664Xhttp://hdl.handle.net/10183/142378000939641Known radiation emission mechanisms in plasmas include bremmstrahlung (or free-free emission), gyro- and synchrotron radiation, cyclotron maser, and plasma emission. For unmagnetized plasmas, only bremmstrahlung and plasma emissions are viable. Of these, bremmstrahlung becomes inoperative in the absence of collisions, and the plasma emission requires the presence of electron beam, followed by various scattering and conversion processes. The present Letter proposes a new type of radiation emission process for plasmas in a state of thermodynamic quasi-equilibrium between particles and enhanced Langmuir turbulence. The radiation emission mechanism proposed in the present Letter is not predicted by the linear theory of thermal plasmas, but it relies on nonlinear wave-particle resonance processes. The electromagnetic particle-in-cell numerical simulation supports the new mechanism.application/pdfengPhysics of plasmas. Melville. Vol. 21, no. 1 (Jan. 2014), 010701, 4 p.Turbulência em plasmasFlutuações em plasmasRadiação eletromagnéticaSpontaneous emission of electromagnetic radiation in turbulent plasmasEstrangeiroinfo: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:UFRGSORIGINAL000939641.pdf000939641.pdfTexto completo (inglês)application/pdf1812564http://www.lume.ufrgs.br/bitstream/10183/142378/1/000939641.pdf5c35a04449effbee8b0960461e51994dMD51TEXT000939641.pdf.txt000939641.pdf.txtExtracted Texttext/plain22628http://www.lume.ufrgs.br/bitstream/10183/142378/2/000939641.pdf.txt0492aa7918aeaac4c5f3874d9a1a0970MD52THUMBNAIL000939641.pdf.jpg000939641.pdf.jpgGenerated Thumbnailimage/jpeg1971http://www.lume.ufrgs.br/bitstream/10183/142378/3/000939641.pdf.jpgbeab33b7fc03378ee34dd0c7f5d9f9b4MD5310183/1423782023-09-23 03:37:38.021687oai:www.lume.ufrgs.br:10183/142378Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-09-23T06:37:38Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Spontaneous emission of electromagnetic radiation in turbulent plasmas
title Spontaneous emission of electromagnetic radiation in turbulent plasmas
spellingShingle Spontaneous emission of electromagnetic radiation in turbulent plasmas
Ziebell, Luiz Fernando
Turbulência em plasmas
Flutuações em plasmas
Radiação eletromagnética
title_short Spontaneous emission of electromagnetic radiation in turbulent plasmas
title_full Spontaneous emission of electromagnetic radiation in turbulent plasmas
title_fullStr Spontaneous emission of electromagnetic radiation in turbulent plasmas
title_full_unstemmed Spontaneous emission of electromagnetic radiation in turbulent plasmas
title_sort Spontaneous emission of electromagnetic radiation in turbulent plasmas
author Ziebell, Luiz Fernando
author_facet Ziebell, Luiz Fernando
Yoon, Peter H.
Simões Júnior, Fernando Jaques Ruiz
Gaelzer, Rudi
Pavan, Joel
author_role author
author2 Yoon, Peter H.
Simões Júnior, Fernando Jaques Ruiz
Gaelzer, Rudi
Pavan, Joel
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Ziebell, Luiz Fernando
Yoon, Peter H.
Simões Júnior, Fernando Jaques Ruiz
Gaelzer, Rudi
Pavan, Joel
dc.subject.por.fl_str_mv Turbulência em plasmas
Flutuações em plasmas
Radiação eletromagnética
topic Turbulência em plasmas
Flutuações em plasmas
Radiação eletromagnética
description Known radiation emission mechanisms in plasmas include bremmstrahlung (or free-free emission), gyro- and synchrotron radiation, cyclotron maser, and plasma emission. For unmagnetized plasmas, only bremmstrahlung and plasma emissions are viable. Of these, bremmstrahlung becomes inoperative in the absence of collisions, and the plasma emission requires the presence of electron beam, followed by various scattering and conversion processes. The present Letter proposes a new type of radiation emission process for plasmas in a state of thermodynamic quasi-equilibrium between particles and enhanced Langmuir turbulence. The radiation emission mechanism proposed in the present Letter is not predicted by the linear theory of thermal plasmas, but it relies on nonlinear wave-particle resonance processes. The electromagnetic particle-in-cell numerical simulation supports the new mechanism.
publishDate 2014
dc.date.issued.fl_str_mv 2014
dc.date.accessioned.fl_str_mv 2016-06-09T02:08:24Z
dc.type.driver.fl_str_mv Estrangeiro
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/142378
dc.identifier.issn.pt_BR.fl_str_mv 1070-664X
dc.identifier.nrb.pt_BR.fl_str_mv 000939641
identifier_str_mv 1070-664X
000939641
url http://hdl.handle.net/10183/142378
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv Physics of plasmas. Melville. Vol. 21, no. 1 (Jan. 2014), 010701, 4 p.
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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