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Title: Ion kinetic effects on the wake potential behind a dust grain in a flowing plasma

Abstract

The structure of the wake potential downstream of a stationary dust grain in a flowing plasma is studied on ion time scales using particle-in-cell simulation methods. The scaling of the wake is investigated as a function of Mach number and other parameters as well as the dimensionality of the system. The results are compared and discussed in relation to various theoretical expressions for the wake. Consistent with theory, in one dimension the wake wavelength scales as M{lambda}{sub De}(1-M{sup 2}){sup -1/2} for M<1, where M is the Mach number and {lambda}{sub De} is the electron Debye length, while no wake forms for M>1. In two dimensions, a wake is formed for both M<1 and M>1, while the wake wavelength scales as M{lambda}{sub De} in both regimes. The amplitude of the wake peaks at M{approx_equal}1 in both the one- and two-dimensional simulations. (c) 2000 American Institute of Physics.

Authors:
 [1];  [1];  [1];  [1]
  1. Applied Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
Publication Date:
OSTI Identifier:
20216540
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 7; Journal Issue: 6; Other Information: PBD: Jun 2000; Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DUSTS; PLASMA IMPURITIES; KINETIC EQUATIONS; PLASMA FLUID EQUATIONS; PLASMA SIMULATION; THEORETICAL DATA

Citation Formats

Winske, D., Daughton, W., Lemons, D. S., and Murillo, M. S. Ion kinetic effects on the wake potential behind a dust grain in a flowing plasma. United States: N. p., 2000. Web. doi:10.1063/1.874067.
Winske, D., Daughton, W., Lemons, D. S., & Murillo, M. S. Ion kinetic effects on the wake potential behind a dust grain in a flowing plasma. United States. doi:10.1063/1.874067.
Winske, D., Daughton, W., Lemons, D. S., and Murillo, M. S. Thu . "Ion kinetic effects on the wake potential behind a dust grain in a flowing plasma". United States. doi:10.1063/1.874067.
@article{osti_20216540,
title = {Ion kinetic effects on the wake potential behind a dust grain in a flowing plasma},
author = {Winske, D. and Daughton, W. and Lemons, D. S. and Murillo, M. S.},
abstractNote = {The structure of the wake potential downstream of a stationary dust grain in a flowing plasma is studied on ion time scales using particle-in-cell simulation methods. The scaling of the wake is investigated as a function of Mach number and other parameters as well as the dimensionality of the system. The results are compared and discussed in relation to various theoretical expressions for the wake. Consistent with theory, in one dimension the wake wavelength scales as M{lambda}{sub De}(1-M{sup 2}){sup -1/2} for M<1, where M is the Mach number and {lambda}{sub De} is the electron Debye length, while no wake forms for M>1. In two dimensions, a wake is formed for both M<1 and M>1, while the wake wavelength scales as M{lambda}{sub De} in both regimes. The amplitude of the wake peaks at M{approx_equal}1 in both the one- and two-dimensional simulations. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.874067},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 6,
volume = 7,
place = {United States},
year = {2000},
month = {6}
}