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P: Fachverband Plasmaphysik

P 13: Dusty Plasmas

P 13.1: Talk

Wednesday, March 30, 2022, 16:00–16:15, P-H11

The sticking machine: measuring electron sticking coefficients using dusty plasmas — •Armin Mengel and Franko Greiner — Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel

In many plasma-surface interactions, the electron sticking coefficient is, due to lack of better knowledge, assumed to be 1. However, recent quantum-mechanical calculations^[1] hint at significantly smaller values for dielectric surfaces. The goal of the presented project is to experimentally determine the particle charge and thus (via a relative measurement scheme) the low-energy electron sticking coefficient. In order to achieve this, a new approach using microparticles of the material of interest confined in the sheath of a radiofrequency plasma is introduced, employing long-distance microscopy and an improved phase resolved resonance method.
[1] F.X.Bronold et al., Plasma Phys. Cont. Fusion 59 (2017) 014011,
https://iopscience.iop.org/article/10.1088/0741-3335/59/1/014011