Soliton and Double Layer Solutions for Four Component Dusty Plasmas

Details Soliton and Double Layer Solutions for Four Component Dusty Plasmas Soliton and Double Layer Solutions for Four Component Dusty Plasmas

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..784..506s&link_type=abstract

MAGNETIC FIELDS IN THE UNIVERSE: From Laboratory and Stars to Primordial Structures. AIP Conference Proceedings, Volume 784, pp

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2

Dusty Plasmas, Plasma Solitons, Dusty Or Complex Plasmas, Plasma Crystals, Nonlinear Phenomena: Waves, Wave Propagation, And Other Interactions, Solitons, Bgk Modes

Scientific paper

In dusty plasmas with warm electrons, warm positive ions, and negative and positively charged cold dust grains which are simultaneously present, it is shown that stationary solutions of the fluid equations combined with Poisson's equation can be expressed in terms of the energy integral of a classical particle with a modified Sagdeev potential. We found that in four component dusty plasma there are changes in the nonlinear properties of the DAW. Compressive dust-acoustic solitons exist only when there is at least a trace of positively charged dust grains. The four fluid dusty plasma system, with both the negatively and positively charged dust grains, provides the ambient to excite double layers. These are analyzed both analytically and numerically. The parametric regions of solitons, cavitons and double layers are given, and their profiles are displayed graphically. At the end, we have analysed the case in which the dust charge is introduced self-consistently, using a simple charging model. The result of this analysis is that for small k-values large damping occurs, but as k-values become large the damping factor goes to zero, so, the soliton and double layers analysis maintain valid.

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