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TY - CONF AU - Wang, X.F. AU - Feng, C. AU - Li, X.M. AU - Liang, Y.F. AU - Sun, J.T. AU - Wang, Z. AU - Yang, X.M. AU - Yi, H. AU - Yu, Y. AU - Zeng, L. AU - Zhang, W.Q. ED - Schaa, Volker RW ED - Huang, Wenhui ED - Yan, Xueqing ED - Tang, Chuanxiang ED - Li, Lu TI - Physical Design for EEHG Beamlines at S3FEL J2 - Proc. of SAP2023, Xichang, China, 10-12 July 2023 CY - Xichang, China T2 - Symposium on Accelerator Physics T3 - 14 LA - english AB - The proposed Shenzhen Superconducting Soft X-Ray Free-electron Laser (S3FEL) aims at generating FEL pulses from 1 nm to 30 nm. At phase-I, two undulator beamlines work at ehco-enable harmonic generation (EEHG) principle. The two undulators will cover the spectral ranges 2.3-15 nm (~83-539 eV) and 5-30 nm (~41-248 eV), respectively, when receiving electrons from 2.5 GeV superconducting linac. However, the generated FEL radiation is sensitive to various electron beam properties, e.g., its energy profile influenced by collective effects such as Coherent Synchroton Radiation (CSR), especially at high harmonics. To generate intense full coherent FEL radiation at ultra-short wavelength, a novel technique of EEHG cascaded harmonic lasing method is also considered. Physical design and FEL performance are described in this paper. PB - JACoW Publishing CP - Geneva, Switzerland SP - 55 EP - 58 KW - FEL KW - electron KW - undulator KW - radiation KW - simulation DA - 2024/11 PY - 2024 SN - 978-3-95450-265-3 DO - doi:10.18429/JACoW-SAP2023-MOPB026 UR - https://jacow.org/sap2023/papers/mopb026.pdf ER -