Influence of the Plasma Absorption on the Longitudinal Dust Lattice Waves in Dusty Plasmas

Abstract

We investigate the influence of the plasma absorption on the longitudinal dust lattice wave in highly collisional dusty plasmas. The dispersion relation for the dust lattice wave has been obtained by the considering of the screened effective nearest-neighbor interactions. It is found that the plasma absorption effect strongly suppresses the frequency of the longitudinal dust lattice wave. It is also found that the frequency of the dust lattice wave decreases with increasing the inter-dust grain spacing. In addition, we have found that the frequency of the dust lattice wave decreases with an increase of the ratio of the electron temperature to the ion temperatures, in dusty plasmas. Hence, we have found that the amplitudes of the dust lattice waves in one-temperature plasmas are always greater than those in highly nonequilibrium dusty plasmas. (c) 2013 The Japan Society of Applied Physics