Particle-Wave Micro-Dynamics in Nonlinear Self-Excited Dust Acoustic Waves

The large amplitude dust acoustic wave can be self-excited in a low-pressure dusty plasma. In the wave, the nonlinear wave-particle interaction determines particle motion, which in turn determines the waveform and wave propagation. In this work, the above behaviors are investigated by directly track...

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Bibliographic Details
Main Authors: Tsai, Chen-Yu, Teng, Lee-Wen, Liao, Chen-Ting, Lin, I
Format: Conference Proceeding
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DUSTS
FLUCTUATIONS
ION ACOUSTIC WAVES
LAGRANGIAN FUNCTION
MICROSCOPY
NONLINEAR PROBLEMS
OSCILLATIONS
PARTICLES
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
RF SYSTEMS
SOUND WAVES
TRAPPING
WAVE FORMS
WAVE PROPAGATION
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Summary:The large amplitude dust acoustic wave can be self-excited in a low-pressure dusty plasma. In the wave, the nonlinear wave-particle interaction determines particle motion, which in turn determines the waveform and wave propagation. In this work, the above behaviors are investigated by directly tracking particle motion through video-microscopy. A Lagrangian picture for the wave dynamics is constructed. The wave particle interaction associated with the transition from ordered to disordered particle oscillation, the wave crest trapping and wave heating are demonstrated and discussed.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.2997270