1. Skobeltsyn Institute of Nuclear Physics, M.V. Lomonosov Moscow State University, 119992 Vorob'evy Gory, Moscow, Russia
2. Synchrotron Radiation Laboratory, Physics Faculty, M.V. Lomonosov Moscow State University, 119992 Vorob'evy Gory, Moscow, Russia
3. Laser Materials and Technology Research Center of GPI, Vavilov str. 38, Bdl. “D”, 119991 Moscow, Russia