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