Laboratory observation of the dust‐acoustic wave mode

1995 ◽  
Vol 2 (10) ◽  
pp. 3563-3565 ◽  
Author(s):  
A. Barkan ◽  
R. L. Merlino ◽  
N. D’Angelo
Keyword(s):  
Acoustic Wave ◽  
Wave Mode ◽  
Laboratory Observation ◽  
Dust Acoustic Wave ◽  
Dust Acoustic

Volumetric measurement of the synchronization and desynchronization of the dust acoustic wave with an external modulation

2019 ◽  
Vol 85 (5) ◽  
Author(s):  
Jeremiah D. Williams
Keyword(s):  
Acoustic Wave ◽  
Phase Synchronization ◽  
Wave Mode ◽  
Gas Pressure ◽  
Dust Acoustic Wave ◽  
Neutral Gas ◽  
External Modulation ◽  
Naturally Occurring ◽  
Dust Acoustic ◽  
Temporal Measurement

A spatio-temporal measurement showing the volumetric nature of the phase synchronization of a naturally occurring dust acoustic wave to an external modulation and the relaxation from the driven wave mode back to the naturally occurring wave mode (phase desynchronization) is presented. It is shown that the phase synchronization and desynchronization occur behind a propagating synchronization/desynchronization front that travels at a slower speed than the phase velocity of the wave and that the speed of this synchronization/desynchronization front decreases with increasing neutral gas pressure. It is also observed that volume of the wave that is synchronous depends on the frequency of the external modulation and the neutral gas pressure.

Spatial Evolution of the Dust-Acoustic Wave

2013 ◽  
Vol 41 (4) ◽  
pp. 788-793 ◽  
Author(s):  
Jeremiah Williams
Keyword(s):  
Acoustic Wave ◽  
High Speed ◽  
Wave Amplitude ◽  
Wave Mode ◽  
Glow Discharge Plasma ◽  
Initial Growth ◽  
Dust Acoustic Wave ◽  
Weakly Coupled ◽  
Dust Acoustic ◽  
Dusty Plasma System

Over the past twenty years, the dust-acoustic wave (DAW) has been a subject of intense study. In this paper, high-speed video imaging is employed to measure the evolution of wavefronts of a propagating DAW as it propagates through a weakly coupled dusty plasma system in an argon dc glow discharge plasma. In particular, measurements of the growth, saturation, and, then, damping of the wave mode as the wave propagates through the cloud are reported. It is observed that the wave amplitude initially exhibits rapid growth while the wavefront compresses. After this initial growth, the width of the wavefront remains relatively constant, while the amplitude of the wavefront evolves like the background dust medium. In some cases, it is also observed that the wave amplitude can decay more quickly than the background dust medium.

Instability of dust acoustic wave due to nonthermal ions in a charge varying dusty plasma

2004 ◽  
Vol 11 (7) ◽  
pp. 3602-3609 ◽  
Author(s):  
Samiran Ghosh ◽  
R. Bharuthram ◽  
Manoranjan Khan ◽  
M. R. Gupta
Keyword(s):  
Acoustic Wave ◽  
Dusty Plasma ◽  
Dust Acoustic Wave ◽  
Dust Acoustic ◽  
A Charge

Dispersion Relation of Dust Acoustic Wave in Dusty Plasma with Charge Fluctuations

2010 ◽  
Author(s):  
H. Asgari ◽  
S. V. Muniandy ◽  
C. S. Wong ◽  
P. Chatterjee ◽  
A. K. Yahya ◽  
...  
Keyword(s):  
Dispersion Relation ◽  
Acoustic Wave ◽  
Dusty Plasma ◽  
Charge Fluctuations ◽  
Dust Acoustic Wave ◽  
Dust Acoustic
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