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Generation of harmonic Langmuir mode by beam-plasma instability

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Generation of harmonic Langmuir mode by beam-plasma instability

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Título Generation of harmonic Langmuir mode by beam-plasma instability
Autor Gaelzer, Rudi
Ziebell, Luiz Fernando
Yoon, Peter H.
Abstract In this article, numerical solutions of the generalized weak turbulence equation [P. H. Yoon, Phys. Plasmas 7, 4858 (2000)] are carried out. In the generalized weak turbulence theory, the generation of the 2vpe-harmonic Langmuir mode is treated as a fundamental process in turbulent beam-plasma interaction process, in addition to, and concomitant to, the well-known nonlinear processes such as Langmuir and ion-sound mode coupling and wave-particle interactions. The present numerical analysis shows that the harmonic mode, which is a solution to a nonlinear dispersion equation, hence a ‘‘nonlinear’’ eigenmode, grows primarily due to an induced emission process, which is a ‘‘linear’’ wave-particle interaction process. The harmonic Langmuir mode generation has been observed since the late 1960s in laboratory experiments, simulations, and in space. However, adequate and quantitative theoretical explanation has not been forthcoming. The present work represents a step toward an understanding of such a phenomenon.
Contido em Physics of plasmas. Melville. Vol. 9, no. 1 (Jan. 2002), p. 96-110
Assunto Instabilidade em plasmas
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/141201
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