Experimental Study of Dust Acoustic Waves in the Strongly Correlated Regime
arXiv:1604.05528 · doi:10.1063/1.2134584
Abstract
Low frequency dust acoustic waves (DAW) were excited in a laboratory argon dusty plasma by modulating the discharge voltage with a low frequency AC signal. Metallic graphite particles were used as dust grains and a digital FFT technique was used to obtain dispersion characteristics. The experimental dispersion relation shows the reduction of phase velocity and a regime where $\partial Ï/\partial k < 0$. A comparison is made with existing theoretical model.
It contains four pages with three figures