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Title:
Simulations of a low frequency beam-cyclotron instability in a dusty plasma
Authors:
Rosenberg, M.; Quest, K.; Kercher, B.
Affiliation:
AA(Department of Electrical and Computer Engineering, University of California San Diego, La Jolla, CA 92093, USA), AB(Department of Electrical and Computer Engineering, University of California San Diego, La Jolla, CA 92093, USA), AC(Department of Electrical and Computer Engineering, University of California San Diego, La Jolla, CA 92093, USA)
Publication:
Journal of Plasma Physics, Volume 84, Issue 6, article id. 905840612, 16 pp.
Publication Date:
12/2018
Origin:
CUP
Keywords:
dusty plasmas, plasma instabilities, plasma simulation
Abstract Copyright:
(c) 2018: © Cambridge University Press 2018
DOI:
10.1017/S0022377818001198
Bibliographic Code:
2018JPlPh..84f9012R

Abstract

The nonlinear development of a low frequency beam-cyclotron instability in a collisional plasma composed of magnetized ions and electrons and unmagnetized, negatively charged dust is investigated using one-dimensional particle-in-cell simulations. Collisions of charged particles with neutrals are taken into account via a Langevin operator. The instability, which is driven by an ion drift, excites a quasi-discrete wavenumber spectrum of waves that propagate perpendicular to the magnetic field with frequency of the order of the dust plasma frequency. In the linear regime, the unstable wavelengths are of the order of the ion gyroradius. As the wave energy density increases, the dominant modes shift to longer wavelengths, suggesting a transition to a Hall-current-type instability. Parameters are considered that reflect the ordering of plasma and dust quantities in laboratory dusty plasmas with high magnetic field. Comparison with the nonlinear development of this beam cyclotron instability in a collisionless dusty plasma is also briefly discussed.
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