1. Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
2. Department of Mathematics, Universität Hamburg, Bundesstraße 55, 20146 Hamburg, Germany
3. Center for Ultrafast Imaging, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
4. Department of Chemistry, Universität Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany
5. Department of Physics, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany