*YANJUN GU1,2, Francesco Pegoraro3, Pavel Sasorov1, Daniil Golovin4, Akifumi Yogo4, Georg Korn1, Sergei Bulanov1,5,6
(1. Institute of Physics of ASCR, ELI-Beamlines, 2. Institute of Plasma Physics of the CAS, 3. Enrico Fermi Department of Physics, University of Pisa, 4. Institute of Laser Engineering, Osaka University, 5. Kansai Photon Research Institute, National Institutes for Quantum and Radiological Science and Technology, 6. A. M. Prokorov Institute of General Physics, the Russian Academy of Sciences)