Learning Electron Bunch Distribution along a FEL Beamline by Normalising Flows. - Anna Willmann; Jurjen Couperus Cabadag; Yen-Yu Chang; Richard Pausch; Amin Ghaith; Alexander Debus; Arie Irman; Michael Bussmann; Ulrich Schramm; Nico Hoffmann (CoRR, 2023)