Research Frontiers 2017 Research Frontiers 2017 102 A large jump in performance has been achieved by introducing BL2 and BL3 pulse-by-pulse switching operations in user experiments [1,2]. Since September 2017 [1], three FEL beamlines, BL1 for soft-X-ray FEL, and BL2 and BL3 for hard X-ray FELs, have been available simultaneously for a variety of experiments. This new operation standard significantly increases opportunities for user experiments, and the net user time in FY2017 across user shifts at BL1 to BL3 is expected to exceed 5000 hours, while maintaining high laser availability and short-pulse characteristics with efficient multi-beamline operations. Figure 1 shows the typical intensity stability at the three FEL beamlines. SACLA Beam Performance Hitoshi Tanaka RIKEN SPring-8 Center Email: tanaka@spring8.or.jp References [1] C. Kondo et al. : Proc. of IPAC2017, Copenhagen, Denmark (2017) pp. 3404. [2] T. Hara et al. : Proc. of FEL2017, Santa Fe, USA (2017) - in press. Fig. 1. Typical laser intensity trends during user experiments. The upper, middle, and lower graphs show the intensity stability at BL3, BL2, and BL1, respectively. The repetition rates of SACLA and BL1 dedicated accelerator are 60 Hz. BL3 (Hard-X) 9.4 keV 700 μ J/pulse BL2 (Hard-X) 7.0 keV 400 μ J/pulse BL1 (Soft-X) 103 keV 120 μ J/pulse 60 Hz beam switching Dedicated accelerator Pulse Energy 736.4 microJ/pulse Repetition Rate 30 Hz 08:00 0 0 50 100 150 200 250 300 350 400 450 0 5 Photon Energy (keV) 0 5 10 15 20 Photon Energy (keV) 10 15 20 100 200 300 400 500 600 700 800 900 10:00 12:00 14:00 16:00 18:00 20:00 22:00 00:00 02:00 04:00 06:00 08:00 10:00 08:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 00:00 02:00 04:00 06:00 08:00 10:00 0 20 40 60 80 100 120 140 0 50 100 150 200 Photon Energy (keV ) Pulse Energy ( μ J/pulse) Pulse Energy ( μ J/pulse) Pulse Energy ( μ J/pulse) 08:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 00:00 02:00 04:00 06:00 08:00 10:00 Photon Energy / Wavelength 9.4 keV / 0.131 nm Intensity Fluctuation in 30 shots (STD) 7.6% Pulse Energy 401.2 microJ/pulse Repetition Rate 30 Hz Photon Energy / Wavelength 7.0 keV / 0.177 nm Intensity Fluctuation in 30 shots (STD) 8.0% Pulse Energy 108.9 microJ/pulse Repetition Rate 60 Hz Photon Energy / Wavelength 102.6 keV / 12.1 nm Intensity Fluctuation in 30 shots (STD) 19.3% 08 :00 0 0 0 0 0 0 0 0 0 0 0 0 5 0 5 1 1 2 1 1 2 0 0 0 0 0 0 0 0 0 10:00 12:00 14:00 16:00 18:00 20:00 22:00 00:00 02:00 04:00 06:00 08:00 10:00 08:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 00:00 02:00 04:00 06:00 08:00 10:00 0 0 0 0 0 0 0 0 0 5 1 1 2 08:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 00:00 02:00 04:00 06:00 08:00 10:00 P ulse Energy gy 401.2 micr o J/pulse p Repetition Rate 30 Hz Photon Energy / Wavelength gy g 7.0 keV / 0.177 nm Intensity Fluctuation in 30 shots (STD 8.0% Pulse Energy gy 108.9 micr o J/pulse p Repetition Rate 60 Hz Photon Energy / Wavelength gy g 102.6 keV / 12.1 nm Intensity Fluctuation in 30 shots (STD 19. 3 %
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