Title :
Imaging of the Dust Acoustic Wave to Explore Synchronization
Author :
Don, Wellalage ; Ruhunusiri, Suranga ; Goree, J.
Author_Institution :
Dept. of Phys. & Astron., Univ. of Iowa, Iowa City, IA, USA
Abstract :
A self-excited dust acoustic wave is synchronized by sinusoidal modulation of the ion density, and the wave is imaged by planar laser-light scattering. Space-time diagrams based on the images reveal how the nonlinearity of the plasma´s response causes the wave´s frequency to be synchronized to a multiple of 0.5, 1, 2, or 3 of the modulation frequency. Space-time diagrams also reveal wave front merging as is observed for a wide range of modulation frequencies.
Keywords :
dusty plasmas; light scattering; plasma density; plasma diagnostics; plasma nonlinear processes; plasma waves; space-time configurations; synchronisation; ion density; modulation frequency; planar laser-light scattering; plasma response nonlinearity; self-excited dust acoustic wave; sinusoidal modulation; space-time diagrams; synchronization; wave frequency; wave front merging; Acoustic waves; Frequency modulation; Frequency synchronization; Plasmas; Scattering; Synchronization; Dusty plasmas; plasma waves; plasma waves.;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2014.2321105
