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Simulations of the ion–dust streaming instability with non-Maxwellian ions

Published online by Cambridge University Press:  04 December 2017

K. Quest ,
M. Rosenberg  and
B. Kercher
K. Quest
Affiliation:
Department of Electrical and Computer Engineering, University of California San Diego, La Jolla, CA 92093, USA
M. Rosenberg*
Affiliation:
Department of Electrical and Computer Engineering, University of California San Diego, La Jolla, CA 92093, USA
B. Kercher
Affiliation:
Department of Electrical and Computer Engineering, University of California San Diego, La Jolla, CA 92093, USA
*
†Email address for correspondence: rosenber@ece.ucsd.edu
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Abstract

The dust acoustic, or dust density, wave is a very low frequency collective mode in a dusty plasma that is associated with the motion of the charged and massive dust grains. An ion flow due to an electric field can excite these waves via an ion–dust streaming instability. Theories of this instability have often assumed a shifted-Maxwellian ion velocity distribution. Recently, the linear kinetic theory of this instability was considered using a non-Maxwellian ion velocity distribution (Kählert, Phys. Plasmas, vol. 22, 2015, 073703). In this paper, we present one-dimensional PIC simulations of the nonlinear development of the ion–dust streaming instability, comparing the results for these two types of ion velocity distributions, for several values of the ion drift speed and collision rate. Parameters are considered that reflect the ordering of plasma and dust quantities in laboratory dusty plasma experiments. It is found that, in general, the wave energy density is smaller in the simulations with a non-Maxwellian ion distribution.

Keywords

dusty plasmasplasma instabilitiesplasma simulation
Type
Research Article
Information
Journal of Plasma Physics , Volume 83 , Issue 6 , December 2017 , 905830612
Copyright
© Cambridge University Press 2017 

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