1. European XFEL GmbH, Albert-Einstein-Ring 19, Hamburg D-22671, Germany
2. Institute of Physics, PAS Al. Lotnikw 32/46, Warsaw PL-02-668, Poland
3. Institute of Physics, ASCR, Na Slovance 2, CZ 182 21 Prague 8, Czech Republic
4. Helmholtz-Zentrum Geesthacht, Max-Planck-Straße 1, Geesthacht D-21502, Germany
5. Deutsches Elektronen-Synchrotron, Notkestraße 85, Hamburg D-22607, Germany
6. RIKEN/SPring-8 Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan
7. Japan Synchrotron Radiation Research Institute (JASRI), Kouto 1-1-1, Sayo, Hyogo 679-5198, Japan