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 - Dommach, M. ED - Schaa, Volker R.W. ED - Bian, Lin ED - Chen, Zhichu ED - Dong, Yuhui ED - He, Ping TI - Upgrade of European XFEL Beam Shutters for Full Beam Operation J2 - Proc. of MEDSI2023, Beijing, China, 06-10 November 2023 CY - Beijing, China T2 - International Conference on Mechanical Engineering Design of Synchrotron Radiation Equipment and Instrumentation T3 - 12 LA - english AB - The European XFEL, a Free-Electron-Laser facility in the Hamburg area (Germany), started user operation in September 2017. In full operation the novel facility will produce coherent femtosecond pulses with unprecedented brilliance in the energy range from 250 eV to 25 keV at MHz repetition rate. The facility consists of a linear accelerator and three photon beamlines, located in underground tunnels. Different sections of the beamlines can be closed with mechanical shutters, blocking the beam and allowing access to one of the tunnels or experimental hutches. Material damage tests have shown that the X-ray beam, in an extremely unlikely event, is capable of damaging the absorber in front of the shutters, if focusing elements like CRLs or bendable mirrors are not operated properly. To exclude such events, the power at different parts of the beam transport system is currently limited. In order to abolish this limitation an upgrade of all absorbers was carried out implementing new absorbing materials like CVD diamond and an active safety system. This presentation will give an overview of the new design, implementation and first commissioning results from an engineering point of view. PB - JACoW Publishing CP - Geneva, Switzerland ER -