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 Pis'ma v Zh. Èksper. Teoret. Fiz., 2019, Volume 110, Issue 11, Pages 729–735 (Mi jetpl6057)

PLASMA, HYDRO- AND GAS DYNAMICS

On the effect of confinement on the structure of a complex (dusty) plasma

B. A. Klumovab

a High Energy Density Research Center, Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, 125412 Russia
b Ural Federal University, Yekaterinburg, 620002 Russia

Abstract: The influence of the confining parabolic potential (confinement) on the equilibrium configurations of a bounded highly nonideal complex (dusty) plasma in the one- and two-dimensional cases in the approximation of the pair interaction between microparticles by means of the Yukawa potential has been considered. In particular, it has been shown that the dust component of the complex plasma is essentially inhomogeneous in such a confining potential: the density of microparticles drops markedly to the system boundaries. This effect qualitatively changes the character of phase transitions (melting and crystallization) in such systems. For example, melting (crystallization) of a two-dimensional system of microparticles occurs with the formation of a melting (crystallization) wave, which propagates from the boundaries of the system to its center (in the case of crystallization, it propagates from the center to the boundaries). It has been shown that the equilibrium distribution of the density of the microparticles is determined only by the stiffness of the interparticle interaction, which makes it possible to noninvasively determine the screening parameter $\kappa$, which is the key interaction parameter, in the experiments with dusty plasma.

 Funding Agency Grant Number Russian Academy of Sciences - Federal Agency for Scientific Organizations This work was supported by the Presidium of the Russian Academy of Science (program “Condensed Matter and Plasma at High Energy Densities”).

DOI: https://doi.org/10.1134/S0370274X19230036

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English version:
Journal of Experimental and Theoretical Physics Letters, 2019, 110:11, 715–721

Bibliographic databases:

Revised: 23.10.2019
Accepted:24.10.2019

Citation: B. A. Klumov, “On the effect of confinement on the structure of a complex (dusty) plasma”, Pis'ma v Zh. Èksper. Teoret. Fiz., 110:11 (2019), 729–735; JETP Letters, 110:11 (2019), 715–721

Citation in format AMSBIB
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