Jaromír Chalupský⁶, Thomas E. Cowan^1,8, Sebastian Göde⁵, Jörg Grenzer¹, Věra Hájková⁶, Peter Hilz^2,3,4, Willi Hippler^2,3,4, Hauke Höppner¹, Alžběta Horynová^6,9, Lingen Huang¹, Oliver Humphries⁵, Šimon Jelínek^10,6,7, Libor Juha⁶, Felix Karbstein^2,3,4,†, Christian Kohlfürst¹, Alejandro Laso Garcia¹, Robert Lötzsch^2,3,4, Masruri Masruri⁵, Aimé Matheron^2,3,4, Motoaki Nakatsutsumi⁵, Gerhard G. Paulus^2,3,4, Alexander Pelka⁵, Thomas R. Preston⁵, Sripati V. Rahul⁵, Lisa Randolph⁵, Alexander Sävert^2,3,4, Hans-Peter Schlenvoigt¹, Ralf Schützhold^1,8, Jan Patrick Schwinkendorf^1,5, Thomas Stöhlker^2,3,4, Monika Toncian¹, Toma Toncian¹, Maksim Valialshchikov^2,3,4, Vojtěch Vozda⁶, Edgar Weckert¹¹, Colin Wessel^2,3,4, Jan Wild⁷, Ulf Zastrau⁵, and Matt Zepf^2,3,4,‡

• ¹Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
• ²Helmholtz-Institut Jena, Fröbelstieg 3, 07743 Jena, Germany
• ³GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
• ⁴Faculty of Physics and Astronomy, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
• ⁵European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany
• ⁶Department of Radiation and Chemical Physics, Institute of Physics, Czech Academy of Sciences, Na Slovance 2, 182 00 Prague 8, Czech Republic
• ⁷Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 182 00 Prague 8, Czech Republic
• ⁸Technische Universität Dresden, 01062 Dresden, Germany
• ⁹Department of Nuclear Chemistry, Faculty of Nuclear Science and Physical Engineering, Czech Technical University in Prague, Břehová 7, 115 19 Prague 1, Czech Republic
• ¹⁰Laser Plasma Department, Institute of Plasma Physics, Czech Academy of Sciences, Za Slovankou 3, 182 00 Prague 8, Czech Republic
• ¹¹Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany

• ^*Contact author: m.smid@hzdr.de
• ^†Contact author: f.karbstein@hi-jena.gsi.de
• ^‡Contact author: m.zepf@hi-jena.gsi.de