1. Lawrence Livermore National Laboratory, Livermore, California 94550, USA
2. Centre Lasers Intenses et Applications, University of Bordeaux-CNRS-CEA, 33405 Talence, France
3. ELI-Beamlines, Institute of Physics, Czech Academy of Sciences, 25241 Dolní Břežany, Czech Republic
4. York Plasma Institute, University of York, Heslington, York YO10 5DQ, United Kingdom