In this paper we consider the behavior of the dust particles around the electric probe with a negative potential. The size of the dust‐free region, which depends on the probe potential, was experimentally determined. Theoretical calculation of the size of the dust‐free region based on the energy balance was performed. Comparison of theoretical estimations with experimental results was made. Also in this work the results of the theoretical investigation of the oscillations of the dust particles based on the Fourier analysis of the velocity autocorrelation functions are presented. It is shown that real and imaginary parts of the spectral function have maximum near the plasma frequency of the dust particles at large values of coupling parameter and small values of friction coefficient. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

This paper presents the results of the analysis of the experimentally measured width of the dust-free region around a single electric probe in a dusty plasma of glow discharge. The experimental results were compared with the data of a theoretical study on the basis of the balance equation of the dust particles thermal energy and their electrostatic interaction energy with the probe. An alternative method for the determination of the buffer plasma parameters was developed by measuring the dust-free region area around the probe. Using this method the temperature and the concentration of electrons in an argon glow discharge plasma in the pressure range from to were determined.

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