title: Kazakov and Fülöp reply.
authors.affiliation: Laboratory for Plasma Physics, LPP-ERM/KMS, TEC Partner, BE-1000 Brussels, Belgium.
authors.forename: Ye O
authors.initials: YO
authors.lastname: Kazakov
authors.affiliation: Department of Applied Physics, Chalmers University of Technology, SE-41296 Göteborg, Sweden.
authors.forename: T
authors.initials: T
authors.lastname: Fülöp