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Updated: May 2, 2026

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
Published on: May 9, 2021
Effect of strong coupling on the dust acoustic instability
M Rosenberg1, G J Kalman2, P Hartmann3
1Department of Electrical and Computer Engineering, University of California San Diego, La Jolla, California, 92093, USA.
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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