RUDI GAELZER
Departamento de Física - Instituto de Física - Universidade Federal do Rio Grande do Sul
Av. Bento Gonçalves, 9500 - Caixa Postal 15051 - 91501-970 - Porto Alegre-RS - Sala N206 (Prédio 43134) (rudi.gaelzer@ufrgs.br) (email)
Av. Bento Gonçalves, 9500 - Caixa Postal 15051 - 91501-970 - Porto Alegre-RS - Sala N206 (Prédio 43134) (rudi.gaelzer@ufrgs.br) (email)
In the present article, the classic problem of nonlinear frequency shifts of electrostatic plasma eigenmodes in an unmagnetized plasma (i.e., the Langmuir and ion-acoustic waves) is revisited. In the standard literature, only the frequency shift of Langmuir waves by the finite-amplitude Langmuir waves themselves is usually treated. In the present approach, the discussion is generalized to include the ion-sound waves. The significance of the present article is that the analytical approach employed in the present discussion can be utilized to resolve certain apparently singular terms in the induced scattering coefficients of the wave kinetic equations. The detailed discussion of such a problem will be reported in a forthcoming article.
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