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TY - UNPB AU - Kim, C. AU - Kang, H.-S. AU - Kim, G. AU - Ko, I.S. AU - Ko, J.H. ED - Tavares, Daniel ED - Picoreti, Renan ED - Bruno, Gustavo ED - Marques, Sergio ED - Schaa, Volker R.W. TI - Monitor for Microbunching Instability in X-ray Free Electron Laser J2 - Proc. of IBIC2020, Santos, Brazil, 14-18 September 2020 CY - Santos, Brazil T2 - International Beam Instrumentation Conference T3 - 9 LA - english AB - The microbunching instability is an important issue in an X-ray Free Electron Laser (XFEL) because the intensity of the FEL can be reduced significantly when the microbunching instability is generated. In the X-ray Free Electron Laser of the Pohang Accelerator Laboratory (PAL-XFEL), a visible CCD camera was installed in the existing coherent radiation monitor (CRM) for the bunch length monitoring. The measurement result shows that the CCD camera can be used as a direct monitor to diagnose the microbunching instability and can be used to optimize the FEL lasing in the PAL-XFEL. PB - JACoW Publishing CP - Geneva, Switzerland ER -