1. Central Laser Facility, Rutherford Appleton Laboratory, Harwell OX110QX, United Kingdom
2. Department of Radiation and Chemical Physics, Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 18221 Prague 8, Czechia
3. SUPA Department of Physics, University of Strathclyde, Glasgow G4 0NG, United Kingdom
4. Kansai Photon Science Institute, National Institutes for Quantum and Radiological Science and Technology, 8-1-7 Umemidai, Kizugawa, Kyoto 619-0215, Japan