Modulational instability in the beat wave generation

Denis Pesme, Seppo Karttunen, Rainer Salomaa, G. Laval, N. Silvestre

Research output: Contribution to journalArticleScientificpeer-review

20 Citations (Scopus)


The coupling of a large amplitude plasmon, generated by the beat-wave process, to ion acoustic waves may lead to modulational or decay instabilities, which are investigated here. A general dispersion relation obtainable from Zakharov equations predicts large growth rates (∼ωpi) for short wavelength modulations. To avoid these, extremely short pulse lengths are required in the beat-wave experiments. Due to the very long wavelength of the beat-plasmon, the decay instability is not likely below the ke V-temperatures.
Original languageEnglish
Pages (from-to)199-210
JournalLaser and Particle Beams
Issue number2
Publication statusPublished - 1988
MoE publication typeA1 Journal article-refereed


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