Abeghyan S, Bagha-Shanjani M, Chen G, Englisch U, Karabekyan S, Li Y, Preisskorn F, Wolff-Fabris F, Wuenschel M, Yakopov M, Pflueger J
European XFEL, Holzkoppel 4, 22869 Schenefeld, Germany.
Institute of Fluid Physics, Chinese Academy of Engineering Physics, 64 Mianshan Road, Mianyang, 62199, People's Republic of China.
J Synchrotron Radiat. 2019 Mar 1;26(Pt 2):302-310. doi: 10.1107/S1600577518017125. Epub 2019 Feb 7.
The European XFEL comprises three undulator systems. All of the systems use standardized mechanical, magnetic and control components. The key elements such as undulators, phase shifters and quadrupole movers as well as their controls are described, with special emphasis on the SASE1 undulator system, which was the first to become operational and has been lasing since May 2017. The role of these systems for the commissioning is outlined with special emphasis on beam-based alignment, which was important to achieve first lasing. Radiation damage was observed. The exposure doses were measured with the online radiation dosimetry system. Countermeasures and latest results are reported, which are important for a high-duty-cycle machine such as the European XFEL.
欧洲X射线自由电子激光装置由三个波荡器系统组成。所有系统均使用标准化的机械、磁性和控制部件。文中描述了诸如波荡器、移相器和四极磁体及其控制等关键元件，特别着重介绍了自2017年5月首个投入运行并开始出光的自放大自发辐射1号波荡器系统。概述了这些系统在调试中的作用，特别强调了基于束流的对准，这对首次出光至关重要。观察到了辐射损伤。使用在线辐射剂量测定系统测量了曝光剂量。报告了应对措施和最新结果，这些对于像欧洲X射线自由电子激光装置这样的高占空比机器来说很重要。
