Dust Ion-Acoustic Surface Wave in a Lorentzian Plasma

Abstract

Electrostatic surface waves propagating on the interface between a vacuum and a plasma with kappa distribution are kinetically derived by using the Vlasov-Maxwell equations. The plasma is semi-bounded, uniform, isotropic, collisionless, and unmagnetized. A specular reflection condition in which the charged particles undergo a mirror reflection is used for the boundary condition on a small perturbation distribution. It is shown that the ion-acoustic surface modes can be varied with the values of the spectral index , especially in the long wavelength limit.