Topical issue “Plasma Sources and Plasma Processes (PSPP)” Luís Lemos Alves, Thierry Belmonte and Tiberiu Minea Eur. Phys. J. Appl. Phys., 82 1 (2018) 10801 Published online: 08 June 2018 DOI: 10.1051/epjap/2018180117