Göttingen 2025 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 12: Complex Plasmas and Dusty Plasmas I

P 12.4: Vortrag

Mittwoch, 2. April 2025, 12:00–12:15, ZHG006

Investigation of dust density waves in binary systems — •Natascha Blosczyk and Dietmar Block — Institute of Experimental and Applied Physics, Kiel University, Kiel, Germany

The wave dynamics in monodisperse dusty plasmas are quite well understood. Theoretical predictions of dispersion relations have been verified in a number of experiments with self-excited or driven waves. For binary systems the situation is different. In general the wave properties will depend on the system properties like mixing ratio, charge ratios and local order. In this work an approach to evaluate the wave dynamics is presented for binary systems in experiments. The waves are driven with a laser manipulation system which launches plane wave fronts into the binary system. The measured system response in terms of particle trajectories is analyzed with the so-called Hilbert-transform which allows to measure with spatial resolution the wave frequency and wave number. This allows us to investigate the wave dispersion in these binary systems. Further, we are able to test whether the local particle arrangement affects the wave propagation. This contribution will show typical results and discuss prospects and limitations of this approach.

Keywords: dust density waves; wave dynamics; laser manipulation; wave dispersion