1. Institute for Laser and Plasma Technologies, National Research Nuclear University MEPhI, Kashirskoye Shosse 31, Moscow 115409, Russia
2. Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13/19, Moscow 127412, Russia
3. Kepler Aerospace Ltd., 2908 Enterprise LN, Midland, TX 79706, USA
4. Institute for Electrophysics and Electric Power, Russian Academy of Sciences, Dvortsovaya Naberezhnaya, 18, St. Petersburg 191186, Russia