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P: Fachverband Plasmaphysik

P 9: Poster I

P 9.39: Poster

Tuesday, March 29, 2022, 16:00–17:30, P

Pulse excitation method for the determination of microparticle properties — •Armin Mengel and Franko Greiner — Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel

The fact that a microparticle trapped in the sheath of a radiofrequency plasma behaves like a harmonic oscillator is often employed for diagnostics of particle properties, like charge-to-mass ratio or neutral drag coefficient. While traditional resonance methods like the frequency sweep^[1] or phase resolved resonance method(PRRM)^[2] rely on a sequence of measurements at a set of individual frequencies, possibly resulting in low time resolution, excitation with a pulse signal offers the opportunity to obtain the same parameters from a single time-resolved trajectory of the particle response within a much shorter time. We present a comparative study of PRRM and pulse excitation method (PEM).
[1] A. Melzer et al., Phys. Lett. A, 191 (1994) 301-308, https://doi.org/10.1016/0375-9601(94)90144-9
[2] H. Jung et al., J. Plasma Phys. (2016), 82(3), 615820301, https://doi.org/10.1017/S0022377816000441