Effect of secondary electron emission and other sources on the propagation of dust ion acoustic waves in a complex plasma with positively charged dust grains

The effect of secondary electron emission on dust ion acoustic wave (DIA) propagation has been investigated based on orbit motion limited (OML) theory of dust grain charging. The emitted secondaries are assumed to have the same temperature of that of the ambient plasma electrons so that the plasma is effectively composed of three components: The ions, electrons and the varying charged dusts. Together with the effect of secondary electron emission, the effect of ion and electron capture and ionization of neutral atoms and recombination have been included in the ion and electron fluid equations. Small amplitude perturbation is considered about a charge neutral steady state. It is seen that for the positively charged dust grains, waves are purely damped about the equilibrium. The frequency and damping decrement of DIA waves in complex plasmas with positively charged dust grains are determined.