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Evolution of frequency clusters in the naturally occurring dust acoustic wave
1Department of Physics, Wittenberg University, Springfield, Ohio 45504, USA.
Abstract:
The spatiotemporal evolution of the naturally occurring dust acoustic wave mode is experimentally investigated in a weakly coupled dc glow discharge dusty plasma system over a range of neutral gas pressures through the application of a time-resolved Hilbert Transform. Frequency clusters are observed over a range of neutral gas pressures, though their spatial distribution varies with neutral gas pressure. It is also observed that the wave frequency is observed to drop by ∼ 10 Hz across these frequency clusters independent of the experimental parameters.
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