1. Institute of Physics, Czech Academy of Sciences, Na Slovance 2, 182 21 Prague 8, Czech Republic
2. Department of Physics, Faculty of Electrical Engineering, Czech Technical University, Technická 2, 166 27 Prague 6, Czech Republic
3. Russian Research Center "Kurchatov Institute," 123182 Moscow, Russia
4. Research Institute of Pulsed Systems, 115304 Moscow, Russia
5. Dipartimento di Fisica "G. Occhialini" and INFM, Università degli Studi di Milano Bicocca, Piazza della Scienza 3, 20126 Milano, Italy
6. Institute of Plasma Physics, Czech Academy of Sciences, Za Slovankou 3, 182 21 Prague 8, Czech Republic
7. Ion Light Technologies GmbH, Lessingstrasse 2c, 93077 Bad Abbach, Germany