Theory of cavitons in complex plasmas

Padma Shukla, Bengt Eliasson, Ingmar Sandberg

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Nonlinear coupling between Langmuir waves with finite amplitude dispersive dust acoustic perturbations is considered. It is shown that the interaction is governed by a pair of coupled nonlinear differential equations. Numerical results reveal the formation of Langmuir envelope solitons composed of the dust density depression created by the ponderomotive force of bell-shaped Langmuir wave envelops. The associated ambipolar potential is positive. The present nonlinear theory should be able to account for the trapping of large amplitude Langmuir waves in finite amplitude dust density holes. This scenario may appear in Saturn’s dense rings, and the Cassini spacecraft should be able to observe fully nonlinear cavitons, as presented herein. Furthermore, we propose that new electron-beam plasma experiments should be conducted to verify our theoretical prediction.
LanguageEnglish
Article number075005
Number of pages4
JournalPhysical Review Letters
Volume91
Issue number7
DOIs
Publication statusPublished - 15 Aug 2003

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cavitons
dust
ponderomotive forces
Saturn
bells
spacecraft
differential equations
envelopes
solitary waves
trapping
electron beams
perturbation
acoustics
rings
predictions
interactions

Keywords

  • complex plasmas
  • dusty plasmas
  • cavitons

Cite this

Shukla, Padma ; Eliasson, Bengt ; Sandberg, Ingmar. / Theory of cavitons in complex plasmas. In: Physical Review Letters. 2003 ; Vol. 91, No. 7.
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Theory of cavitons in complex plasmas. / Shukla, Padma; Eliasson, Bengt; Sandberg, Ingmar.

In: Physical Review Letters, Vol. 91, No. 7, 075005, 15.08.2003.

Research output: Contribution to journalArticle

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AU - Sandberg, Ingmar

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