Nonlinear modulation of ion-acoustic waves in two-electron-temperature plasmas

A. Esfandyari-Kalejahi, Yannis Kourakis, M. Akbari-Moghanjoughi

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


The amplitude modulation of ion-acoustic waves IS investigated in a plasma consisting of adiabatic warm ions, and two different populations of thermal electrons at different temperatures. The fluid equations are reduced to nonlinear Schrodinger equation by employing a multi-scale perturbation technique. A linear stability analysis for the wave packet amplitude reveals that long wavelengths are always stable, while modulational instability sets in for shorter wavelengths. It is shown that increasing the value of the hot-to-cold electron temperature ratio (mu), for a given value of the hot-to-cold electron density ratio (nu): favors instability. The role of the ion temperature is also discussed. In the limiting case nu = 0 (or nu -> infinity). which correspond(s) to an ordinary (single) electron-ion plasma, the results of previous works are recovered.
Original languageEnglish
Pages (from-to)169-181
Number of pages13
JournalJournal of plasma physics
Issue number2
Publication statusPublished - Apr 2010

ASJC Scopus subject areas

  • Condensed Matter Physics


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