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 - TY - CONF AU - Liu, YX. AU - Liu, T. ED - Schaa, Volker RW ED - Huang, Wenhui ED - Yan, Xueqing ED - Tang, Chuanxiang ED - Li, Lu TI - A Scheme of Fully Coherent X-Ray Free Electron Laser for the Shine Based on Fresh-Slices J2 - Proc. of SAP2023, Xichang, China, 10-12 July 2023 CY - Xichang, China T2 - Symposium on Accelerator Physics T3 - 14 LA - english AB - In this paper, the fresh-slice self-seeding free electron laser scheme is studied, and the feasibility of its application in the SHINE project is analyzed. The scheme used the fresh-slice method to generate the beam with adjustable spatial distribution, which can effectively improve the longitudinal coherence and stability of the self-seeding output radiation. Through the FEL simulation, we demonstrated that this scheme can produce a highly stable, narrow bandwidth pulse output under the SHINE’s parametric conditions, which will be beneficial to further improve the performance of this device in the future. PB - JACoW Publishing CP - Geneva, Switzerland SP - 59 EP - 61 KW - electron KW - FEL KW - radiation KW - undulator KW - simulation DA - 2024/11 PY - 2024 SN - 978-3-95450-265-3 DO - doi:10.18429/JACoW-SAP2023-MOPB027 UR - https://jacow.org/sap2023/papers/mopb027.pdf ER - TY - CONF AU - Zhang, Q.L. AU - Li, C.L. AU - Lu, Y. AU - Wang, K. AU - Wang, Y.X. ED - Schaa, Volker RW ED - Huang, Wenhui ED - Yan, Xueqing ED - Tang, Chuanxiang ED - Li, Lu TI - Compact Accelerator Light Source for Industrial Applications J2 - Proc. of SAP2023, Xichang, China, 10-12 July 2023 CY - Xichang, China T2 - Symposium on Accelerator Physics T3 - 14 LA - english AB - Synchrotron radiation has great application potential in industry. However, the large scale of modern light source has limited it from popular use. Compact accelerator light source has many virtues such as small scale, cost effectiveness, maintenance convenience, etc., which make it a main solution of light source application in industry. The idea has attracted great interests from many institutes, and much effort has been put into its research and development. In this paper we present a design of compact accelerator light source with very small scale. The lattice is very simple to ensure its compactness, while the beam parameters remain flexible to industry needs. PB - JACoW Publishing CP - Geneva, Switzerland SP - 82 EP - 84 KW - radiation KW - synchrotron KW - storage-ring KW - synchrotron-radiation KW - injection DA - 2024/11 PY - 2024 SN - 978-3-95450-265-3 DO - doi:10.18429/JACoW-SAP2023-MOPB036 UR - https://jacow.org/sap2023/papers/mopb036.pdf ER - TY - CONF AU - Liu, H. AU - Chen, S. AU - Deng, H.X. AU - Guo, J.J. AU - Liu, B. AU - Wen, Y.M. ED - Schaa, Volker RW ED - Huang, Wenhui ED - Yan, Xueqing ED - Tang, Chuanxiang ED - Li, Lu TI - Wakefield Studies for the Step Structure and the Skin Depth of Coated Dielectric Tubes J2 - Proc. of SAP2023, Xichang, China, 10-12 July 2023 CY - Xichang, China T2 - Symposium on Accelerator Physics T3 - 14 LA - english AB - Wakefield issues are always important research objects in free electron laser (FEL) facilities. Since the wakefield in free electron laser facilities usually leads to a decrease of FEL performance, the research of the wakefield impacts is of great significance. Step structures are almost ubiquitous in the overall undulator section of an FEL facility, which always generate critical wakefields. In this paper, we systematically analyze and summarize the wakefield characteristics of step structures including the step-in structure and the step-out structure. In addition, the skin depth issue of the wakefield is still controversial. We study the skin depth of the wakefield field in the vacuum chamber of the kicker in the SHINE, which is made of the dielectric pipe. We proposed the conception of ¿effective skin depth¿ from two different perspectives and wrote simulation codes to calculate the ¿effective skin depth¿. We hope these methods could provide new mentalities for related research in the future. PB - JACoW Publishing CP - Geneva, Switzerland SP - 147 EP - 150 KW - wakefield KW - electron KW - impedance KW - FEL KW - simulation DA - 2024/11 PY - 2024 SN - 978-3-95450-265-3 DO - doi:10.18429/JACoW-SAP2023-TUPB029 UR - https://jacow.org/sap2023/papers/tupb029.pdf ER -