Stereoscopy on Yukawa Balls in Dusty Plasmas

The static properties and the dynamics of spherically symmetric 3-D particle clusters (Yukawa balls) are determined experimentally. For that purpose, the stereoscopy with two standard video cameras as well as a three-camera high-speed system is used to simultaneously measure the positions of all particles in a Yukawa ball. The order phenomena, like shell configuration and occupation numbers, are found to be in agreement with the models and simulations. The normal modes´ analysis for the Yukawa ball is presented