Collisional damping rates for plasma waves
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/164998 |
Resumo: | The distinction between the plasma dynamics dominated by collisional transport versus collective processes has never been rigorously addressed until recently. A recent paper [P. H. Yoon et al., Phys. Rev. E 93, 033203 (2016)] formulates for the first time, a unified kinetic theory in which collective processes and collisional dynamics are systematically incorporated from first principles. One of the outcomes of such a formalism is the rigorous derivation of collisional damping rates for Langmuir and ion-acoustic waves, which can be contrasted to the heuristic customary approach. However, the results are given only in formal mathematical expressions. The present brief communication numerically evaluates the rigorous collisional damping rates by considering the case of plasma particles with Maxwellian velocity distribution function so as to assess the consequence of the rigorous formalism in a quantitative manner. Comparison with the heuristic (“Spitzer”) formula shows that the accurate damping rates are much lower in magnitude than the conventional expression, which implies that the traditional approach over-estimates the importance of attenuation of plasma waves by collisional relaxation process. Such a finding may have a wide applicability ranging from laboratory to space and astrophysical plasmas. |
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Ferrão, Sabrina TigikZiebell, Luiz FernandoYoon, Peter H.2017-08-09T02:36:59Z20161070-664Xhttp://hdl.handle.net/10183/164998001021371The distinction between the plasma dynamics dominated by collisional transport versus collective processes has never been rigorously addressed until recently. A recent paper [P. H. Yoon et al., Phys. Rev. E 93, 033203 (2016)] formulates for the first time, a unified kinetic theory in which collective processes and collisional dynamics are systematically incorporated from first principles. One of the outcomes of such a formalism is the rigorous derivation of collisional damping rates for Langmuir and ion-acoustic waves, which can be contrasted to the heuristic customary approach. However, the results are given only in formal mathematical expressions. The present brief communication numerically evaluates the rigorous collisional damping rates by considering the case of plasma particles with Maxwellian velocity distribution function so as to assess the consequence of the rigorous formalism in a quantitative manner. Comparison with the heuristic (“Spitzer”) formula shows that the accurate damping rates are much lower in magnitude than the conventional expression, which implies that the traditional approach over-estimates the importance of attenuation of plasma waves by collisional relaxation process. Such a finding may have a wide applicability ranging from laboratory to space and astrophysical plasmas.application/pdfengPhysics of plasmas. Melville. Vol. 23, no. 6 (Jun. 2016), 064504, 5 p.Processos de colisao em plasmasPlasmas astrofisicosOndas de Langmuir em plasmasOndas íon-acústicas em plasmasCollisional damping rates for plasma wavesEstrangeiroinfo: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:UFRGSORIGINAL001021371.pdf001021371.pdfTexto completo (inglês)application/pdf571488http://www.lume.ufrgs.br/bitstream/10183/164998/1/001021371.pdf37085f75b117b9f2b0a06481bd77aeceMD51TEXT001021371.pdf.txt001021371.pdf.txtExtracted Texttext/plain21694http://www.lume.ufrgs.br/bitstream/10183/164998/2/001021371.pdf.txtf2e7de5ea3ec4b4c4171b1efaa148345MD52THUMBNAIL001021371.pdf.jpg001021371.pdf.jpgGenerated Thumbnailimage/jpeg1375http://www.lume.ufrgs.br/bitstream/10183/164998/3/001021371.pdf.jpgf8c6154a86c585b9665f36122bc43f88MD5310183/1649982023-09-23 03:38:12.760995oai:www.lume.ufrgs.br:10183/164998Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-09-23T06:38:12Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Collisional damping rates for plasma waves |
title |
Collisional damping rates for plasma waves |
spellingShingle |
Collisional damping rates for plasma waves Ferrão, Sabrina Tigik Processos de colisao em plasmas Plasmas astrofisicos Ondas de Langmuir em plasmas Ondas íon-acústicas em plasmas |
title_short |
Collisional damping rates for plasma waves |
title_full |
Collisional damping rates for plasma waves |
title_fullStr |
Collisional damping rates for plasma waves |
title_full_unstemmed |
Collisional damping rates for plasma waves |
title_sort |
Collisional damping rates for plasma waves |
author |
Ferrão, Sabrina Tigik |
author_facet |
Ferrão, Sabrina Tigik Ziebell, Luiz Fernando Yoon, Peter H. |
author_role |
author |
author2 |
Ziebell, Luiz Fernando Yoon, Peter H. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Ferrão, Sabrina Tigik Ziebell, Luiz Fernando Yoon, Peter H. |
dc.subject.por.fl_str_mv |
Processos de colisao em plasmas Plasmas astrofisicos Ondas de Langmuir em plasmas Ondas íon-acústicas em plasmas |
topic |
Processos de colisao em plasmas Plasmas astrofisicos Ondas de Langmuir em plasmas Ondas íon-acústicas em plasmas |
description |
The distinction between the plasma dynamics dominated by collisional transport versus collective processes has never been rigorously addressed until recently. A recent paper [P. H. Yoon et al., Phys. Rev. E 93, 033203 (2016)] formulates for the first time, a unified kinetic theory in which collective processes and collisional dynamics are systematically incorporated from first principles. One of the outcomes of such a formalism is the rigorous derivation of collisional damping rates for Langmuir and ion-acoustic waves, which can be contrasted to the heuristic customary approach. However, the results are given only in formal mathematical expressions. The present brief communication numerically evaluates the rigorous collisional damping rates by considering the case of plasma particles with Maxwellian velocity distribution function so as to assess the consequence of the rigorous formalism in a quantitative manner. Comparison with the heuristic (“Spitzer”) formula shows that the accurate damping rates are much lower in magnitude than the conventional expression, which implies that the traditional approach over-estimates the importance of attenuation of plasma waves by collisional relaxation process. Such a finding may have a wide applicability ranging from laboratory to space and astrophysical plasmas. |
publishDate |
2016 |
dc.date.issued.fl_str_mv |
2016 |
dc.date.accessioned.fl_str_mv |
2017-08-09T02:36:59Z |
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 |
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publishedVersion |
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http://hdl.handle.net/10183/164998 |
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1070-664X |
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001021371 |
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1070-664X 001021371 |
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http://hdl.handle.net/10183/164998 |
dc.language.iso.fl_str_mv |
eng |
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eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physics of plasmas. Melville. Vol. 23, no. 6 (Jun. 2016), 064504, 5 p. |
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openAccess |
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