We have employed the self-consistent kinetic theory to study the linear dispersion relation of
ion acoustic waves in a four-component plasma consisting of nonextensive hot electrons,
Maxwellian cold electrons, positive ions, and dust particles. The dust charging process with
the modified ion acoustic wave damping, as well as its unstable mode, has been graphically
illustrated. It is found that the dust charging mechanism depends on the density of hot
electrons, the degree of nonextensive electron distribution, and the temperature ratio of hot …