Spectral contents of electron waves under strong Langmuir turbulence

In this work we present experimental results of electron plasma waves excited in a beam plasma system. Based on our experimental results we determine the transition from the quasi-linear to non-linear regime. We present the space evolution of the electron beam distribution function for both regimes. The spectrum of the electron plasma wave in the non-linear regime shows a component with frequency larger than the plasma frequency besides the plasma frequency itself. We show that the higher frequency component is strongly affected by Landau damping, indicating a dissipation region. The measured experimental power spectrum of this wave shows a dependence on wave number k given by Wk <FONT FACE=Symbol>µ</FONT> k-7/2 as theoretically predicted.

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Main Authors: Alves,M. Virgínia, Dallaqua,R. S., Prado,F. Do, Karfidov,D. M.
Format: Digital revista
Language:English
Published: Sociedade Brasileira de Física 2003
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332003000400033
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spelling oai:scielo:S0103-973320030004000332005-11-25Spectral contents of electron waves under strong Langmuir turbulenceAlves,M. VirgíniaDallaqua,R. S.Prado,F. DoKarfidov,D. M.In this work we present experimental results of electron plasma waves excited in a beam plasma system. Based on our experimental results we determine the transition from the quasi-linear to non-linear regime. We present the space evolution of the electron beam distribution function for both regimes. The spectrum of the electron plasma wave in the non-linear regime shows a component with frequency larger than the plasma frequency besides the plasma frequency itself. We show that the higher frequency component is strongly affected by Landau damping, indicating a dissipation region. The measured experimental power spectrum of this wave shows a dependence on wave number k given by Wk <FONT FACE=Symbol>µ</FONT> k-7/2 as theoretically predicted.info:eu-repo/semantics/openAccessSociedade Brasileira de FísicaBrazilian Journal of Physics v.33 n.4 20032003-12-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332003000400033en10.1590/S0103-97332003000400033
institution SCIELO
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country Brasil
countrycode BR
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access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author Alves,M. Virgínia
Dallaqua,R. S.
Prado,F. Do
Karfidov,D. M.
spellingShingle Alves,M. Virgínia
Dallaqua,R. S.
Prado,F. Do
Karfidov,D. M.
Spectral contents of electron waves under strong Langmuir turbulence
author_facet Alves,M. Virgínia
Dallaqua,R. S.
Prado,F. Do
Karfidov,D. M.
author_sort Alves,M. Virgínia
title Spectral contents of electron waves under strong Langmuir turbulence
title_short Spectral contents of electron waves under strong Langmuir turbulence
title_full Spectral contents of electron waves under strong Langmuir turbulence
title_fullStr Spectral contents of electron waves under strong Langmuir turbulence
title_full_unstemmed Spectral contents of electron waves under strong Langmuir turbulence
title_sort spectral contents of electron waves under strong langmuir turbulence
description In this work we present experimental results of electron plasma waves excited in a beam plasma system. Based on our experimental results we determine the transition from the quasi-linear to non-linear regime. We present the space evolution of the electron beam distribution function for both regimes. The spectrum of the electron plasma wave in the non-linear regime shows a component with frequency larger than the plasma frequency besides the plasma frequency itself. We show that the higher frequency component is strongly affected by Landau damping, indicating a dissipation region. The measured experimental power spectrum of this wave shows a dependence on wave number k given by Wk <FONT FACE=Symbol>µ</FONT> k-7/2 as theoretically predicted.
publisher Sociedade Brasileira de Física
publishDate 2003
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332003000400033
work_keys_str_mv AT alvesmvirginia spectralcontentsofelectronwavesunderstronglangmuirturbulence
AT dallaquars spectralcontentsofelectronwavesunderstronglangmuirturbulence
AT pradofdo spectralcontentsofelectronwavesunderstronglangmuirturbulence
AT karfidovdm spectralcontentsofelectronwavesunderstronglangmuirturbulence
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