1. Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
2. Department of Physics, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
3. Charles University, Faculty of Mathematics and Physics, V Holesovickach 2, 180 00 Praha 8, Czech Republic
4. The Hamburg Centre for Ultrafast Imaging CUI, Luruper Chaussee 149, 22761 Hamburg, Germany
5. Helmholtz Institute Jena, Fröbelstieg 3, 07743 Jena, Germany
6. Helmholtz Centre for Heavy Ion Research (GSI), Planckstr. 1, 64291 Darmstadt, Germany
7. Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany
8. European XFEL GmbH, Holzkoppel 4, 22869 Schenefeld, Germany
9. Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Straße 15, 12489 Berlin, Germany
10. Faculty of Electrical Engineering, Helmut Schmidt University, Holstenhofweg 85, 22043 Hamburg, Germany
11. Department of Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany