1. Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318 Leipzig, Germany
2. Science Institute, University of Iceland, Dunhaga 3, IS-107 Reykjavik, Iceland
3. Department of Space and Plasma Physics, School of Electrical Engineering and Computer Science, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
4. Plasma and Coatings Physics Division, IFM-Materials Physics, Linköping University, SE-581 83 Linköping, Sweden
5. Laboratoire de Physique des Gaz et des Plasmas—LPGP, UMR 8578 CNRS, Université Paris–Sud, Université Paris–Saclay, 91405 Orsay Cedex, France
6. Felix Bloch Institute of Solid State Physics, Leipzig University, Linnéstraße 5, 04103 Leipzig, Germany