Title:NONLINEAR PHENOMENA IN SCREENING OF HIGHLY CHARGED GRAINS IN PLASMAS
Authors:O.Bystrenko, A.Zagorodny (Bogolyubov Institute for Theoretical Physics, UA-252143 Kyiv, Ukraine)

Nonlinear effects in screening a high-Z grain immersed in a plasma background were investigated by means of microscopic Monte-Carlo simulations and within the Poisson-Boltzmann theory. A distinct difference from the linear Debye-Huckel approximation was detected in the case of a strong plasma-grain coupling. It effected in the accumulation of the induced plasma charge on the grain surface, accompanied by a sharp enhancement of screening. The critical value of the parameter associated with the beginning of that plasma 'condensation' was determined.

Key words: nonlinear screening, colloidal plasma, Coulomb lattice, phase transition, high-Z impurity
Comments: Figs. 6, Refs. 7, Tabs. 0.