Author: Wu, G.R.
Paper Title Page
MOC04 Operating of SXFEL in a Single Stage High Gain Harmonic Generation Scheme 29
 
  • G.L. Wang, D.X. Dai, G.R. Wu, X.M. Yang, W.Q. Zhang
    DICP, Dalian, People's Republic of China
 
  The beam energy spread at the entrance of undulator system is of paramount importance for efficient density modulation in high-gain seeded free-electron lasers (FELs). In this paper, the dependencies of high harmonic bunching efficiency in the high-gain harmonic generation (HGHG) schemes on the electron energy spread distribution are studied. Theoretical investigations and multi-dimensional numerical simulations are applied to the cases of uniform and saddle beam energy distributions and compared to a traditional Gaussian distribution. It shows that the uniform and saddle electron energy distributions significantly enhance the performance of HGHG-FELs. A numerical example demonstrates that, with the saddle distribution of sliced beam energy spread controlled by a laser heater, the 30th harmonic radiation can be directly generated by a single-stage seeding scheme for a soft x-ray FEL facility.  
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WEA02
Status of SXFEL and DCLS  
 
  • B. Liu, J.H. Chen, J.H. Chen, J. Chen, Z.H. Chen, H.X. Deng, J.G. Ding, G.P. Fang, W. Fang, M. Gu, Q. Gu, X. Hu, D. Huang, M.M. Huang, Y.B. Leng, B. Li, G.Q. Lin, Y. Liu, S. Sun, D. Wang, G. Wang, L. Wang, L. Yin, L.Y. Yu, M. Zhang, W. Zhang, Z.T. Zhao, S.P. Zhong, Q.G. Zhou
    SINAP, Shanghai, People's Republic of China
  • D.X. Dai, G.R. Wu, X.M. Yang, W.Q. Zhang
    DICP, Dalian, People's Republic of China
  • Y.-C. Du, W.-H. Huang
    TUB, Beijing, People's Republic of China
 
  Shanghai Soft X-ray Free-Electron Laser test facility (SXFEL) and Dalian Coherent Light Source (DCLS) and are two main ongoing FEL projects in mainland China, and the design, construction and commissioning will be carried out by Shanghai Institute of Applied Physics. Introduction to these two projects, including background, parameters, design and current status will be presented.  
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