Experimental study of pair correlation function for dusty plasma in rf-discharge

Summary form only given. Information about spatial correlation of the particles in nonideal systems is of great interest in various fields of science and technique. This information is necessary for calculation of various thermodynamic and transport characteristics on a base of known formulas of statistic physics. The pair correlation functions were studied experimentally for quasi-two-dimensional (2D) non-ideal systems. The experiments were carried out in plasma of a capacitive radio-frequency (RF-) discharge in argon for monolayers of the monodispersed (melamine formaldehyde) spheres. A comparison with the existing theoretical and numerical data is presented. An experimental verification of the theoretical model for reconstruction of pair correlation function in strongly nonideal 2D systems was carried out for the first time. New experimental data related to the Hansen´s and Lindemann´s melting criteria for two-dimensional systems was obtained.