Abstract
The structures of Coulomb clusters formed by dust particles in a plasma are studied by numerical simulation. The present study reveals the presence of various types of self-organized structures of clusters confined in an electrostatic potential. The stable configurations depend on the number of dust particles in a cluster as well as on the form of the confining potential. One-dimensional strings, two-dimensional Coulomb lattices, and three-dimensional Coulomb crystals found in the simulation agree well with the observation in the laboratory dust plasma experiments. Elongated axisymmetric Coulomb clusters are found to be composed of a few fundamental configurations. The dynamical features of Coulomb clusters are also studied by the simulation.
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