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Effect of strong coupling on the dust acoustic instability
Journal article   Peer reviewed

Effect of strong coupling on the dust acoustic instability

M Rosenberg, G J Kalman, P Hartmann and J Goree
Physical review. E, Statistical, nonlinear, and soft matter physics, Vol.89(1), pp.013103-013103
01/2014
DOI: 10.1103/PhysRevE.89.013103
PMID: 24580342

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Abstract

In a plasma containing charged dust grains, the dust acoustic instability (DAI) can be driven by ions streaming through the dust with speed less than the ion thermal speed. When the dust is strongly coupled in the liquid phase, the dispersion relation of the dust acoustic modes changes in a way that leads to an enhancement of the growth rate of the DAI. In this paper, we show how strong coupling enhances the DAI growth rate and consider application to microgravity experiments where subthermal ion flows are in general possible.

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