TITLE

Effect of electron nonthermality on nonlinear electrostatic solitary waves in a charge varying dusty plasma

AUTHOR(S)
Tribeche, Mouloud; Boumezoued, Ghania
PUB. DATE
May 2008
SOURCE
Physics of Plasmas;May2008, Vol. 15 Issue 5, p053702
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The effect of nonthermal electrons with excess of fast energetic electrons on large amplitude electrostatic solitary waves is investigated in a charge varying dusty plasma. The correct nonthermal electron charging is investigated based on the orbit-motion-limited approach. It is found that the nonlinear localized potential structure shrinks when the electrons deviate from isothermality. The dust particles are locally expelled and pushed out the region of the soliton localization as the electrons evolve far away from their thermodynamic equilibrium. Under certain conditions, the dust charge fluctuation may provide an alternate physical mechanism causing anomalous dissipation, the strength of which becomes important and may prevail over that of dispersion as the value of the electron nonthermal parameter α increases.
ACCESSION #
32509482

 

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