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TY - UNPB AU - Min, C.-K. ED - Liu, Lin ED - Byrd, John M. ED - Neuenschwander, Regis T. ED - Picoreti, Renan ED - Schaa, Volker R. W. TI - Generation of High-Brightness Self-Seeded X-Ray Free Electron Laser J2 - Proc. of IPAC2021, Campinas, SP, Brazil, 24-28 May 2021 CY - Campinas, SP, Brazil T2 - International Particle Accelerator Conference T3 - 12 LA - english AB - At the PAL-XFEL, we demonstrate substantially improved self-seeded XFEL performance, which promises to add another popular XFEL operation mode with up to ~mJ pulse energy at 9.7 keV (peak spectral brightness, 3.2×10³⁵ photons s⁻¹ mm⁻² mrad⁻² (0.1%BW)⁻¹) and wide tunability (3.5-14.6 keV). The machine is tuned to get stable seeding and its monochromatic amplification process and provide a stable amplitude (better than filtered SASE using DCM) and the time-bandwidth product is close to transform-limited. The suppression ofμbunching instability using a laser heater is much more effective in this narrow spectral bandwidth compared to SASE mode with a broad spectrum. The benefit of this seeded XFEL is demonstrated in serial femtosecond crystallography experiments. PB - JACoW Publishing CP - Geneva, Switzerland ER -