SUKANYA BURMAN, A ROY CHOWDHURY and S N PAUL*

High Energy Physics Division,  Department of Physics, Jadavpur University, Calcutta 700 032, India

*Serampore Girls' College, P.O. Serampore, Dist. Hooghly 73239, West Bengal

Abstract.

Propagation of both low and high frequency waves in a plasma consisting of electrons, ions, positrons and charged dust particles have been theoretically studied. The characteristics of dust acoustic wave propagating through the plasma has been analysed and the dispersion relation deduced is a generalization of that obtained by previous authors. It is found that nonlinear localization of high frequency electromagnetic field in such a plasma generates magnetic field. This magnetic field is seen to depend on the temperatures of electrons and positrons and also on their equilibrium density ratio. It is suggested that the present model would be applicable to find the magnetic field generation in space plasma.

Keywords: Dusty plasma; acoustic waves; high and low frequency; magnetic field generation.

Pacs Nos. 52.35-g; 52.35.Lv; 52.35.Mw