A note on dust wave excitation in a plasma with warm dust: Comparison with experiment

Dust acoustic waves are very low frequency modes associated with the dynamics of charged dust in a plasma. These waves have phase speed much smaller than the ion thermal speed and frequencies typically below the dust plasma frequency which can be on the order of hertz to hundreds of hertz for typical lab dusty plasma parameters. When the phase speed of the wave is much larger than the thermal speed of the dust grains i.e., cold dust , the dispersion relation of a dust acoustic wave DAW is given by