The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - UNPB AU - Malyzhenkov, A. AU - Arbelo, Y.P. AU - Bettoni, S. AU - Craievich, P. AU - Dijkstal, P. AU - Ferrari, E. AU - Juranič, P.N. AU - Prat, E. AU - Reiche, S. ED - Schaa, Volker R.W. ED - Decking, Winfried ED - Sinn, Harald ED - Geloni, Gianluca ED - Schreiber, Siegfried ED - Marx, Michaela TI - Generation of Sub-Femtosecond X-Ray Pulses at SwissFEL J2 - Proc. of FEL2019, Hamburg, Germany, 26-30 August 2019 CY - Hamburg, Germany T2 - Free Electron Laser Conference T3 - 39 LA - english AB - We report on the first generation of sub-femtosecond hard X-ray FEL pulses at SwissFEL. A few microjoule pulses with a single spike in the frequency domain have been predicted by simulations and then experimentally demonstrated. Ultra-short X-ray pulses are produced by the electron bunch with a specially-tailored current profile and longitudinal phase space. This configuration is achieved by means of an optimized nonlinear compression. Two- and three-stage nonlinear compression schemes are compared in terms of FEL performance and stability. We also discuss different FEL lasing regimes that can be realized depending on the particular configuration of the electron beam and undulator settings. PB - JACoW Publishing CP - Geneva, Switzerland ER -