1. Faculty of science Paderborn University Warburger Straße 100 33098 Paderborn Germany
2. Department of Chemistry Technical University of Denmark ‐2800 Kongens Lyngby Denmark
3. Department of Chemical Physics and NanoLund Lund University Box 124 22100 Lund Sweden
4. Argonne National Laboratory Center for Nanoscale Materials 9700 S. Cass Avenue 60439 Lemont, Illinois United States
5. Institute for Inorganic Chemistry and Center for Nanointegration Duisburg‐Essen (Cenide) University of Duisburg‐Essen Universitätsstraße 5‐7 ‐45117 Essen Germany
6. European XFEL, Holzkoppel 4 22869 Schenefeld Germany
7. Faculty of Physics Adam Mickiewicz University, Umultowska 85, 61‐614 Poznań Poland
8. ELI‐ALPS, ELI‐HU Non‐Profit Ltd., Dugonics ter 13, Szeged 6720, Hungary & Attosecond Science Group, Deutsches Elektronen‐Synchrotron (DESY), Notkestrasse 85 Germany