SMuK 2021 – scientific programme

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P: Fachverband Plasmaphysik

P 17: Poster II

P 17.2: Poster

Friday, September 3, 2021, 14:00–16:00, P

Structural properties of binary dusty plasmas — •Charlotte Büschel, Lasse Bruhn, and Dietmar Block — Institut für Experimentelle Plasmaphysik der Christian-Albrechts-Universität zu Kiel, Leibnizstraße 11-19, 24118 Kiel, Deutschland

Complex plasmas with microparticles can be used to analyze strongly coupled systems on an individual particle level. Using binary mixtures of particles, i.e. two particle species of different material and size and thus different charge but at similar confinement conditions, opens up new possibilities to study polydisperse systems. To generate a binary mixture, both species have to have identical confinement conditions. Even small differences result in a separation of the species. That a fully mixed state is nevertheless possible was shown by Wieben et al. [1], where the size loss due to etching processes in the plasma was utilized. First experiments on binary mixtures studied waves [2] as well as thermodynamics [3] . These investigations focused on particle systems in a mixed state. So far, there were no studies about the process of mixing. In this contribution structural properties of binary systems are analyzed on their way from a demixed to a mixed state. Special emphasis is put on the density profile and configurational changes during the mixing process. Thus, this study aims at a global as well as local description of the structure of binary systems as a function of their mixing state.

1. F. Wieben et al., Phys. Plasmas , Vol. 24, No. 3, 2017)

2. Yang et al., EPL , Vol. 117, No. 2, 2017

3. Wieben and Block, Phys. Rev. Lett. , Vol. 100, 2019)