Abstract
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.
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