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Title:
Dynamical behaviors of nonlinear dust acoustic waves: From plane waves to dust acoustic wave turbulence
Authors:
Tsai, Ya-Yi; Chang, Mei-Chu; I., Lin; I.
Affiliation:
AA(Department of Physics and Center for Complex Studies, National Central University, Jhongli, Taiwan 32001, Republic of China), AB(Department of Physics and Center for Complex Studies, National Central University, Jhongli, Taiwan 32001, Republic of China), AC(Department of Physics and Center for Complex Studies, National Central University, Jhongli, Taiwan 32001, Republic of China), AD()
Publication:
Journal of Plasma Physics, Volume 80, Issue 6, pp. 809-816
Publication Date:
12/2014
Origin:
CUP
Abstract Copyright:
(c) 2014: Copyright © Cambridge University Press 2014
DOI:
10.1017/S0022377814000324
Bibliographic Code:
2014JPlPh..80..809T

Abstract

The dust acoustic wave (DAW), associated with longitudinal dust oscillations in dusty plasmas, can be self-excited from the free energy of ion streaming. It is not only a fundamental plasma wave but also a paradigm to understand the generic dynamical behaviors of self-excited nonlinear longitudinal density waves through optically monitoring particle motion and dust density evolutions over a large area. In this paper, the dynamical behaviors of the wave-particle interaction and wave breaking in ordered self-excited DAW with straight wave fronts, and the defect-mediated wave turbulence with fluctuating defects and chaotic low amplitude hole filaments along defect trajectories in the 2+1D space-time space, are briefly reviewed. The first experimental observation of acoustic vortices with helical waveforms in self-excited acoustic-type defect-mediated wave turbulence, and the dynamics of spontaneous pair generation, propagation, and pair annihilation of acoustic vortices, is demonstrated and discussed.
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