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Title: Observation of 3D defect mediated dust acoustic wave turbulence with fluctuating defects and amplitude hole filaments

We experimentally demonstrate the direct observation of defect mediated wave turbulence with fluctuating defects and low amplitude hole filaments, from a 3D self-excited plane dust acoustic wave in a dusty plasma by reducing dissipation. The waveform undulation is found to be the origin for the amplitude and the phase modulations of the local dust density oscillation, the broadening of the sharp peaks in the frequency spectrum, and the fluctuating defects. The corrugated wave crest surface also causes the observed high and low density patches in the transverse (xy) plane. Low oscillation amplitude spots (holes) share the same positions with the defects. Their trajectories in the xyt space appear in the form of chaotic filaments without long term predictability, through uncertain pair generation, propagation, and pair annihilation.
Authors:
; ;  [1]
  1. Department of Physics and Center for Complex Systems, National Central University, Jhongli, Taiwan 32001, Taiwan (China)
Publication Date:
OSTI Identifier:
22220698
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 8; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AMPLITUDES; ANNIHILATION; DENSITY; DUSTS; FILAMENTS; FLUCTUATIONS; HOLES; ION ACOUSTIC WAVES; NONLINEAR PROBLEMS; OSCILLATIONS; PLASMA DENSITY; SOUND WAVES; TRAJECTORIES; TURBULENCE; WAVE FORMS