By Tokushi Sato, Romain Letrun, Henry J. Kirkwood, Jia Liu, Patrik Vagovič, Grant Mills, Yoonhee Kim, Cedric M. S. Takem, Marc Planas, Moritz Emons, Tomasz Jezynski, Guido Palmer, Max Lederer, Sebastian Schulz, Jost Mueller, Holger Schlarb, Alessandro Silenzi, Gabriele Giovanetti, Andrea Parenti, Martin Bergemann, Thomas Michelat, Janusz Szuba, Jan Grünert, Henry Chapman1, Adrian P. Mancuso
1. Center for Free-Electron Laser Science