Achievement and prospect of the PAL-XFEL

The PAL-XFEL has demonstrated excellent timing stability and unprecedented peak brightness since its start of user service operation in June 2017. The 18-fs timing stability in the XFEL allows excellent pump-probe time-resolved experiments with low timing jitter. A self-seeding scheme enables us to produce a higher peak brightness of the XFEL with a narrow bandwidth. The plans for improving the capability of the PAL-XFEL as a user facility have been studied. The 2nd hard X-ray FEL line was designed to double the hard X-ray user’s beamtime, and polarization tunability will be implemented in the soft X-ray FEL line. It will allow more users to experience new science.