The dispersion characteristics of the low-frequency mode associated with vertical oscillations of dust grains in a quasi-two-dimensional dust-plasma crystal are calculated, taking into account the dependence of the dust charge on the local sheath potential. It is shown that the equilibrium of the dust grains close to the electrode may be disrupted by large amplitude vertical oscillations.
|Number of pages
|Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
|Published - Dec 1999