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TY - UNPB AU - Huang, S. AU - Ding, Y. AU - Feng, Y. AU - Hemsing, E. AU - Huang, Z. AU - Krzywinski, J. AU - Lutman, A.A. AU - Marinelli, A. AU - Maxwell, T.J. AU - Zhu, D. ED - Bishofberger, Kip:Carlsten, Bruce (LANL, Los Alamos, NM, USA)[ORCID:0000-0001-5619-907X] ED - Schaa, Volker RW TI - Generating Subfemtosecond Hard X-Ray Pulses with Optimized Nonlinear Bunch Compression J2 - Proc. of FEL2017, Santa Fe, NM, USA, August 20-25, 2017 C1 - Santa Fe, NM, USA T2 - International Free Electron Laser Conference T3 - 38 LA - english AB - A simple method for generating single-spike hard x-ray pulses in free-electron lasers (FELs) has been developed at the Linac Coherent Light Source (LCLS). By optimizing the electron bunch compression in experiments, we have obtained half of the hard x-ray FEL shots containing single-spike spectrum. At 5.6-keV photon energy, the single-spike shots have a mean pulse energy of about 10 J with 70% intensity fluctuation and the pulse width (full width at half maximum) is evaluated to be at 200-attosecond level. PB - JACoW CP - Geneva, Switzerland ER -