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P: Fachverband Plasmaphysik
P 5: Low Pressure Plasmas I
P 5.4: Talk
Tuesday, March 17, 2026, 12:00–12:15, KH 02.016
Non-adiabatic electron energization mechanism in plasmas with a magnetron configuration — •Lukas Vogelhuber1, Kevin Köhn1, Dennis Krüger1, Jens Kallähn1, Yulia Sharova1, Liang Xu2, Ralf Peter Brinkmann1, and Denis Eremin1 — 1Institute of Theoretical Electrical Engineering, Ruhr University Bochum, Universitätsstrasse 150, D-44801 Bochum, Germany — 2School of Physical Science and Technology, Soochow University, Suzhou 215006, China
Partially magnetized plasma discharges in E× B configurations are versatile tools, with applications ranging from Hall-effect thrusters for space propulsion to high-power impulse magnetron sputtering (HiPIMS) for thin-film deposition. In these configurations, structures known as spokes can form as potential humps moving in the ± E× B direction, and influence electron dynamics. Electrons confined in the racetrack region are typically considered to be magnetized, with their magnetic moment serving as an indicator of the degree of confinement; if the magnetic moment is conserved along the trajectory, the energization is adiabatic. However, various processes can disrupt this conservation, including collisions, field interactions, and resonant particle motion, leading to non-adiabatic energy gain by electrons. In this work, this phenomenon is studied to gain a deeper understanding of the collisionless energization of electrons at potential humps in magnetized plasmas.
Keywords: Magnetron; Electron dynamics; Modeling and simulation; Adiabatic invariant; Spoke