Nonlinear Dust Acoustic Waves in the Near Ideal (Gas-Like) Cryogenic Glow Discharge Dusty Plasma

Abstract

A dust acoustic instability in the cryogenic glow discharge dusty plasma at a buffer gas temperature of 83 K is experimentally investigated. Estimates for the main plasma parameters are given. It is shown that dusty plasma is close to a ideal plasma (weakly-coupled). The wave–particle interaction is studied, and it has been shown that the wave is strongly nonlinear. The electric field of the wave is estimated, which also indicates its strong nonlinearity. The presence of slight perturbation of the dust concentration by the wave with strong nonlinearity, which is apparently associated with the high kinetic temperature of the dust fraction and the gaseous phase state of the dust cloud, is an important feature of the described experiment.