Oblique Amplitude Modulation of Dust-Acoustic Plasma Waves

I. Kourakis, P. K. Shukla

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


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 Schrödinger-type equation (NLSE), shows that the wave may become unstable; the stability criteria depend on the angle θ 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 languageBritish English
Pages (from-to)316-327
Number of pages12
JournalPhysica Scripta T
Issue number4
StatePublished - Apr 2004


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