Author Affiliations

Yudong Yang,^1,2,3 Liwei Song,^2,4 Fabian Scheiba,^1,2,3 Giulio Maria Rossi,^1,2,3 Roland E. Mainz,^1,2,3 Shaobo Fang,² Oliver D. Mücke,^1,2 and Franz X. Kärtner^1,2,3

¹The Hamburg Centre for Ultrafast Imaging CUI, University of Hamburg, 22761 Hamburg, Germany

²Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany

³Department of Physics, University of Hamburg, 20355 Hamburg, Germany

⁴State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 201800 Shanghai, China