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TY - UNPB AU - Marinelli, A. ED - Chin, Yong Ho ED - Zhao, Zhentang ED - Petit-Jean-Genaz, Christine ED - Schaa, Volker RW TI - Generation of Atto-Second FELs J2 - Proc. of FLS2018, Shanghai, China, 5-9 March 2018 C1 - Shanghai, China T2 - ICFA Advanced Beam Dynamics Workshop T3 - 60 LA - english AB - Sub-fs X-ray pump/probe capabilities hold great promise for understanding the role of coherent electron dynamics in molecules and solids. At the Linac Coherent Light Source (LCLS) for hard X-ray energies the sub-fs regime can be reached by shortening the electrong bunch and operating the FEL in the single-spike SASE FEL limit. In the soft X-ray region, achieving sub-fs pulses requires bandwidth broadening by means of an enhanced SASE scheme. In this talk I will present recent results on the generation of sub-fs X-ray pulses at LCLS and discuss the path to time-resolved experiments with attosecond time resolution PB - JACoW Publishing CP - Geneva, Switzerland ER -