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@inproceedings{xiang:medsi2023-thppp035, author = {S.W. Xiang and H.X. Deng and R. Deng and Z.Q. Jiang and Y.Y. Lei and J.Y. Yang and W. Zhang and T.T. Zhen and S.D. Zhou}, % author = {S.W. Xiang and H.X. Deng and R. Deng and Z.Q. Jiang and Y.Y. Lei and J.Y. Yang and others}, % author = {S.W. Xiang and others}, title = {{Mechanical System of the U26 Undulator Prototype for SHINE}}, % booktitle = {Proc. MEDSI'23}, booktitle = {Proc. 12th Int. Conf. Mech. Eng. Design Synchrotron Radiat. Equip. Instrum. (MEDSI'23)}, eventdate = {2023-11-06/2023-11-10}, pages = {325--327}, paper = {THPPP035}, language = {english}, keywords = {FEL, undulator, SRF, alignment, linac}, venue = {Beijing, China}, series = {International Conference on Mechanical Engineering Design of Synchrotron Radiation Equipment and Instrumentation}, number = {12}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {07}, year = {2024}, issn = {2673-5520}, isbn = {978-3-95450-250-9}, doi = {10.18429/JACoW-MEDSI2023-THPPP035}, url = {https://jacow.org/medsi2023/papers/thppp035.pdf}, abstract = {{The Shanghai High repetition rate XFEL and Extreme light facility (SHINE) is under construction and aims at generating X-rays between 0.4 and 25 keV with three FEL beamlines at repetition rates of up to 1 MHz. The three undulator lines of the SHINE are referred to as the FEL-I, FEL-II, and FEL-III. Shanghai Synchrotron Radiation Facility(SSRF) will manufacture a total of 42 undulators (U26) with a period length of 26mm for FEL-I and 22 undulators (U55) with a period length of 55mm for FEL-II. Both the U26 and U55 are 4m long and use a common mechanical system. By using the specially designed double lever compensation springs can eliminate different magnetic force on the drive units. A U26 prototype has been developed and tested at SSRF. This paper describes the mechanical system design¿simulation and testing results of the U26 prototype, as well as its compatibility with U55.}}, }