JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - UNPB AU - Inagaki, T. AU - Hara, T. AU - Iwai, E. AU - Kondo, C. AU - Maesaka, H. AU - Tanaka, H. ED - Braun, Hans-Heinrich ED - Chrin, Jan ED - Ganter, Romain ED - Hiller, Nicole ED - Schaa, Volker RW TI - Present Status of SACLA and Plans for Future Upgrades J2 - Proc. of FLS2023, Luzern, Switzerland, 27 August-01 September 2023 CY - Luzern, Switzerland T2 - ICFA Advanced Beam Dynamics Workshop T3 - 67 LA - english AB - SACLA has two XFEL beamlines, BL3 and BL2, which are driven by an 8-GeV normal-conducting C-band high-gradient accelerator and provide SASE from 4 keV to 20 keV, and an EUV-FEL beamline BL1, which is driven by an 800-MeV accelerator and provides SASE from 40 eV to 150 eV. To perform the parallel operation of BL3 and BL2 and the top-up injection into the SPring-8 storage ring, the electron gun, accelerating RF, focusing magnets, and switchyard magnets are synchronously controlled for each 60 Hz pulse. In recent years, experiments using special FELs such as reflection-type self-seeded FELs, two-color, double-pulsed FELs, ultra-short pulsed FELs and nano-focusing optics have been conducted at XFEL beamlines. In order to supply XFELs tailored to various experimental conditions, an automatic tuning system of the accelerator using machine learning has been established and is used for daily tuning. In the future, we plan to improve and precisely control the characteristics of the FEL, such as intensity, pulse duration, spectrum, photon energy, and pulse repetition rate. To achieve these goals, we are working on 1) refinement of accelerator models using electron beam monitors and machine learning, 2) development of the electron gun to increase the beam brightness, 3) development of the efficient RF acceleration. For the purpose of 3, we have started to study a new normal-conducting accelerator design, with the goal of increasing the pulse repetition rate while maintaining XFEL performance and power consumption, to be consistent with ¿Green Facility¿ declaration. In this presentation, we introduce the status and future plans for upgrading SACLA. PB - JACoW Publishing CP - Geneva, Switzerland ER -