1. High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
2. University of Alberta, Edmonton, Alberta T6G 1H9, Canada
3. European XFEL GmbH, 22869 Schenefeld, Germany
4. Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, 01328 Dresden, Germany
5. Technische Universität Dresden, 01062 Dresden, Germany
6. University of California Berkeley, Berkeley, California 94720, USA
7. Friedrich-Schiller-University Jena, 07743 Jena, Germany