1. Keldysh Institute of Applied Mathematics RAS, Moscow 125047, Russia
2. National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow 115409, Russia
3. Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
4. Institute of Physics ASCR, v.v.i. (FZU), ELI-Beamlines Project, 182 21 Prague, Czech Republic
5. National Institutes for Quantum and Radiological Science and Technology (QST), Kansai Photon Science Institute, 8-1-7 Umemidai, Kizugawa, Kyoto 619-0215, Japan