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Title: Ion Acoustic Shocks in Dust Clouds

Abstract

In this paper has been carried numerical simulation of the interaction of the ion acoustic shocks and one-dimensional dust layers in the argon plasma. Plasmas studied in the frame hydrodynamics model, the charge of dust particles is determined according to the orbit-limited model, the potential of the self-consistent electric field is described by Poisson equation. As a result simulation the spatial distributions of plasma parameters are obtained at different times. It is shown that the velocity of dust ion acoustic shocks is increased at the front boundary, and one is decreased at the back boundary of the dust cloud.

Authors:
; ; ; ;  [1]
  1. Faculty of Radio Physics, Taras Shevchenko Kyiv University, Kyiv (Ukraine)
Publication Date:
OSTI Identifier:
20726759
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 799; Journal Issue: 1; Conference: 4. international conference on the physics of dusty plasmas, Orleans (France), 13-17 Jun 2005; Other Information: DOI: 10.1063/1.2134611; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ARGON; DUSTS; ELECTRIC FIELDS; HYDRODYNAMICS; ION ACOUSTIC WAVES; IONS; LAYERS; ONE-DIMENSIONAL CALCULATIONS; PARTICLES; PLASMA; POISSON EQUATION; POTENTIALS; SHOCK WAVES; SIMULATION; SPATIAL DISTRIBUTION

Citation Formats

Chutov, Yu.I., Kravchenko, O.Yu., Yurchuk, M.M., Chehivsky, A., and Lisitchenko, T.E. Ion Acoustic Shocks in Dust Clouds. United States: N. p., 2005. Web. doi:10.1063/1.2134611.
Chutov, Yu.I., Kravchenko, O.Yu., Yurchuk, M.M., Chehivsky, A., & Lisitchenko, T.E. Ion Acoustic Shocks in Dust Clouds. United States. doi:10.1063/1.2134611.
Chutov, Yu.I., Kravchenko, O.Yu., Yurchuk, M.M., Chehivsky, A., and Lisitchenko, T.E. Mon . "Ion Acoustic Shocks in Dust Clouds". United States. doi:10.1063/1.2134611.
@article{osti_20726759,
title = {Ion Acoustic Shocks in Dust Clouds},
author = {Chutov, Yu.I. and Kravchenko, O.Yu. and Yurchuk, M.M. and Chehivsky, A. and Lisitchenko, T.E.},
abstractNote = {In this paper has been carried numerical simulation of the interaction of the ion acoustic shocks and one-dimensional dust layers in the argon plasma. Plasmas studied in the frame hydrodynamics model, the charge of dust particles is determined according to the orbit-limited model, the potential of the self-consistent electric field is described by Poisson equation. As a result simulation the spatial distributions of plasma parameters are obtained at different times. It is shown that the velocity of dust ion acoustic shocks is increased at the front boundary, and one is decreased at the back boundary of the dust cloud.},
doi = {10.1063/1.2134611},
journal = {AIP Conference Proceedings},
number = 1,
volume = 799,
place = {United States},
year = {Mon Oct 31 00:00:00 EST 2005},
month = {Mon Oct 31 00:00:00 EST 2005}
}
  • The formation of dust ion-acoustic shocks in a four-component quantum plasma whose constituents are electrons, both positive and negative ions, and immobile charged dust grains, is studied. The effects of both the dissipation due to kinematic viscosity and the dispersion caused by the charge separation as well as the quantum tunneling associated with the Bohm potential are taken into account. The propagation of small but finite amplitude dust ion-acoustic waves is governed by the Korteweg-de Vries-Burger equation, which exhibits both oscillatory and monotonic shocks depending not only on the viscosity parameters {eta}{sub {+-}}={mu}{sub {+-}}{omega}{sub p-}/c{sub s}{sup 2} (where {mu}{sub {+-}}more » are the coefficients of kinematic viscosity, {omega}{sub p-} is the plasma frequency for negative ions, and c{sub s} is the ion-sound speed), but also on the quantum parameter H (the ratio of the electron plasmon to the electron Fermi energy) and the positive to negative ion density ratio {beta}. Large amplitude stationary shocks are recovered for a Mach number (M) exceeding its critical value (M{sub c}). Unlike the small amplitude shocks, quite a smaller value of {eta}{sub +}, {eta}{sub -}, H and {beta} may lead to the large amplitude monotonic shock structures. The results could be of importance in astrophysical and laser produced plasmas.« less
  • Theoretical and numerical studies of self-steepening and shock formation of large-amplitude dust ion-acoustic waves in dusty plasmas are presented. A comparison is made between the nondispersive two fluid model, which predicts the formation of large-amplitude compressive and rarefactive dust ion-acoustic shocks, Vlasov simulations, and recent laboratory experiments.
  • A comparative analysis of the most important dissipative processes occurring during the excitation and propagation of dust ion-acoustic shocks in a Q machine device, among which are the charging of dust grains, the absorption of ions by grains, the transfer of the ion momentum to the grains, and Landau damping, is performed. The relative roles played by dissipative processes in different types of laboratory experiments with complex plasmas are estimated.
  • Ion acoustic waves can be excited by electrons drifting relative to the ions in a plasma. This relative drift can be produced, in a collisional plasma, by a static electric field. In the analysis of this instability, which occurs for frequencies well below the ion plasma frequency, the electron inertia term in the momentum equation is typically neglected. A similar assumption has been employed in the investigation of the dust ion acoustic instability in a collisional dusty plasma. In the study of the collisional current driven dust acoustic instability, both the electron and ion inertial terms were neglected. It ismore » shown here that the inclusion of the appropriate inertia terms can result in significant differences in the growth rates for these instabilities. The cases studied, including the inertia terms, led to a decrease in the critical electric fields necessary to excite the current driven dust acoustic, dust ion acoustic, and ion acoustic instabilities.« less
  • Repeated, self-excited dust acoustic shock waves (DASWs) have been observed in a dc glow discharge dusty plasma using high-speed video imaging. Two major observations are reported: (1) The self-steepening of a nonlinear dust acoustic wave (DAW) into a saw-tooth wave with sharp gradient in dust density, very similar to those found in numerical solutions of the fully nonlinear fluid equations for a nondispersive DAW [B. Eliasson and P. K. Shukla, Phys. Rev. E 69, 067401 (2004)], and (2) the collision and confluence of two DASWs.