Physics
Scientific paper
Oct 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..799..486r&link_type=abstract
NEW VISTAS IN DUSTY PLASMAS: Fourth International Conference on the Physics of Dusty Plasmas. AIP Conference Proceedings, Volum
Physics
Dusty Plasmas, Plasma Solitons, Plasma Fluctuations, Vlasov Equation, Poisson Equation, Dusty Or Complex Plasmas, Plasma Crystals, Solitons, Bgk Modes, Fluctuation And Chaos Phenomena
Scientific paper
In a dusty plasma the charge on a moving dust grain changes in response to the variations in the local plasma conditions. The charge on a slowly moving grain should be close to a locally determined equilibrium. For a time independent electrostatic structure an integral of motion for a grain with varying charge can then be found. Solutions of Vlasov's equation are given by arbitrary functions of these integrals of motion, so that, using the Poisson equation, a generalised Sagdeev (Classical) potential can be found (Raadu, 2003, Phys. Scripta vol.68, 266). Solitary wave solutions may be investigated making use of this generalised Sagdeev potential. The influence of charge fluctuations on the range of parameters for the existence of solitary waves is considered here. A modified form of the relation between the amplitude and the wave velocity is found.
Raadu Michael A.
Shafiq Muhammad
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