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Description
The Shanghai High-Repetition-Rate XFEL Facility (SHINE), a hard X-ray free-electron laser currently under construction in Zhangjiang, Shanghai, will start with three undulator lines, FEL-I, FEL-II and FEL-III, covering a photon-energy range from 0.4 to 25 keV. In the initial construction phase, nearly 100 undulators are required, mainly including 42 U26 undulators for FEL-I and 18 U55 plus 14 U55&U75 double-period undulators for FEL-II. Delivering this large number of devices within a tight schedule imposes stringent requirements on design, manufacturing, quality control, and tunnel installation and integration.
To address these challenges, a collaborative scheme has been adopted in which the Shanghai Advanced Research Institute takes the lead in overall technical design, magnetic measurements, acceptance criteria and test-facility development, while several domestic industrial partners are responsible for precision machining, assembly, factory testing and delivery. This paper presents the mass-production and installation progress of SHINE undulators, describing the series engineering design, production organization and quality-assurance strategy for the U26, U55 and U55&U75 devices, and reporting the current statistics of modules that have passed magnetic acceptance and have been installed in the tunnel. The experience gained provides practical references for the implementation of large undulator arrays at future high-repetition-rate XFEL facilities.
| In which format do you inted to submit your paper? | Word |
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