Greifswald 2024 – scientific programme

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P: Fachverband Plasmaphysik

P 6: Poster I

P 6.28: Poster

Monday, February 26, 2024, 16:30–18:30, ELP 6: Foyer

The charging of nonspherical particles in a dusty plasma — •Isabel König, Armin Mengel, and Franko Greiner — Institute of Experimental and Applied Physics, Kiel University, Kiel, Germany

For the most part, studies focus on the charging of spherical particles in a plasma, and only a few experiments were performed studying the charging of nonspherical particles. Nonspherical particles have a varying surface potential, which complicates the calculation of the equilibrium particle charge and also affects dust dynamics. One ansatz to determine the charge of nonspherical particles is the smallest enclosing sphere approximation [Asnaz, Phys.Plasmas 2018].

To analyze the charging of micrometer-sized nonspherical particles we use a combination of long-distance microscopy and the phase-resolved resonance method. We compare the nonspherical particles with spherical SiO₂ particles which levitate at the same position in the sheath. Measurements for different kinds of nonspherical particles are performed: clustered microparticles (doublets and triplets), cylinders, tetrapods, MgO and sapphire crystals, multiscale aeromaterials and MOFs.

Keywords: dusty plasma; microparticles; charging of particles; particle in RF shealth