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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Sociedade Brasileira de Física
2003
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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 |
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Alves,M. Virgínia Dallaqua,R. S. Prado,F. Do Karfidov,D. M. |
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Alves,M. Virgínia Dallaqua,R. S. Prado,F. Do Karfidov,D. M. Spectral contents of electron waves under strong Langmuir turbulence |
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Alves,M. Virgínia Dallaqua,R. S. Prado,F. Do Karfidov,D. M. |
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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. |
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Sociedade Brasileira de Física |
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2003 |
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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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1756407285241872384 |