Oblique amplitude modulation of dust-acoustic plasma waves

Yannis Kourakis, P.K. Shukla

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)


Theoretical and numerical studies are presented of the nonlinear amplitude modulation of dust-acoustic (DA) waves propagating in an unmagnetized three component, weakly-coupled, fully ionized plasma consisting of electrons, positive ions and charged dust particles, considering perturbations oblique to the carrier wave propagation direction. The stability analysis, based on a nonlinear Schrodinger-type equation (NLSE), shows that the wave may become unstable; the stability criteria depend on the angle theta between the modulation and propagation directions. Explicit expressions for the instability rate and threshold have been obtained in terms of the dispersion laws of the system. The possibility and conditions for the existence of different types of localized excitations have also been discussed.
Original languageEnglish
Pages (from-to)316-327
Number of pages12
JournalPhysica Scripta
Issue number4
Publication statusPublished - Apr 2004

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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