Berlin 2014 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 16: Helmholtz Graduate School for Plasma Physics I

P 16.5: Fachvortrag

Mittwoch, 19. März 2014, 15:40–16:05, SPA HS202

Recent progress in studying the dynamics of finite 3D dust clouds — •André Schella, Matthias Mulsow, and André Melzer — Institut für Physik, Ernst-Moritz-Arndt-Universität Greifswald, 17489 Greifswald, Germany

Dusty plasmas had become a versatile model system to study diverse physical concepts at the kinetic level since individual particles can be traced by means of video microscopy. One decade ago, Arp et al. conducted groundbreaking experiments with a finite number of harmonically trapped dust particles in a plasma. Due to their mutual particle-particle interaction and their shell-like structures, these 3D dust clouds are termed Yukawa balls. In these finite ensembles volume effects and boundary related effects are always competing, making a quantitative physical description a challenging task.

In my contribution, I will focus onto recent progress in studying the dynamics of finite dust clouds. Here, laser heating is a generic approach drive these systems to the fluid state. During the last years, not only the associated phase transition, but moreover statistical properties of dust clouds were explored. There, a close relationship between transport and disorder even in finite ensembles was demonstrated. Furthermore, I will emphasize the role of dust clusters in studying the recrystallization process of finite matter by means of experiments.