Abstract

The Coulomb lattices of strongly-coupled fine particles, which have a two-dimensional hexagonal structure, are formed in dc discharge plasmas. Static and dynamic properties of the fine-particle clouds are controlled by changing plasma parameters and their spatial structures. A double-plasma method is employed to trigger the phase transition and to increase a vertical spread of the fine-particle clouds. Vortex flows of the particles are generated by two methods: insertion of a small metal plate biased electrically and application of a magnetic field in the vertical direction.

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