LAUSR

In this paper a theoretical approach has been carried out using a fluid model on a bi-dust plasma which consist of two dusts negative charged different particles in an electron-ion plasma. In such system, this fluid model describe a dense strong coupled heavy dust grain together with a weak coupled light dusty particle.The bulk is immersed in a system of electrons and ions dominated by a Thomas-Fermi density distribution, where interaction and propagation of solitary dust acoustic solitary waves (DASW) will be analyzed. This investigation will be carried out for arbitrary amplitude of solitary dust acoustic waves. These are originated througha#13; the presence of both dust grains in the plasma system. Therefore, it is used a set of fluid equation which determine general expressions for the concentrations of different dust particles. The onset of the Sagdeev method is then employed in order to looka#13; for influence of the light component on the quantum system. In this way there is an increasing or decreasing in the Sagdeev potential. This is a quantum effect phenomena.