Author: Wang, D.
Paper Title Page
MOPAB386 Development of Nitrogen-Doping Technology for SHINE 1182
 
  • Y. Zong, X. Huang, Z. Wang
    SINAP, Shanghai, People’s Republic of China
  • J.F. Chen, H.T. Hou, D. Wang, J.N. Wu, Y.X. Zhang
    SARI-CAS, Pudong, Shanghai, People’s Republic of China
  • P.C. Dong
    Shanghai Advanced Research Institute, Pudong, Shanghai, People’s Republic of China
  • Y.W. Huang
    ShanghaiTech University, Shanghai, People’s Republic of China
  • J. Rong
    SSRF, Shanghai, People’s Republic of China
  
  The Shanghai HIgh repetition rate XFEL aNd Extreme light facility (SHINE) is under construction, which needs six hundred 1.3GHz cavities with high quality factor. In this paper, we present the newest studies on single cell cavities with nitrogen doping and cold EP treatment, showing an obvious improvement compared with the previous results.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB386  
About • paper received ※ 21 May 2021       paper accepted ※ 08 June 2021       issue date ※ 20 August 2021  
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TUPAB078 Relative Timing Jitter Effects on Two-stage Seeded FEL at SHINE 1551
 
  • H.X. Yang
    SINAP, Shanghai, People’s Republic of China
  • H.X. Deng, B. Liu, D. Wang, K.S. Zhou
    SARI-CAS, Pudong, Shanghai, People’s Republic of China
  
  Funding: The National Key Research and Development Program of China (Grants No. 2016YFA0401901, No. 2018YFE0103100) and the National Natural Science Foundation of China (Grants No. 11935020, No. 11775293).
The synchronization between the ultrashort electron beam and external seed laser is essential for seeded FELs, especially for a multi-stage one. In this paper, we demonstrate a simple method to obtain the correlations between the pulse energy and relative timing jitter for evaluating the corresponding effects. In this method, the sensitivity of the output FEL performance against electron beam properties is demonstrated by scanning the electron beam and seed lasers, and the fitted curve is used to predict the pulse energy in different timing jitter by random sampling. The results indicate that the pulse energy of the first-stage EEHG is more stable than the second-stage HGHG. Meanwhile, the rise of bunch charge from 100 pC to 300 pC can reduce the timing control requirement by a factor of least 3 for the RMS timing jitter in our numerical simulations based on the parameters of Shanghai High-Repetition-Rate XFEL and Extreme Light Facility. The timing jitter study can demonstrate the feasibility of the EEHG-HGHG cascading scheme in different current profiles for generating Fourier-transform-limited soft X-ray FEL. 		 
poster icon Poster TUPAB078 [0.866 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB078  
About • paper received ※ 11 May 2021       paper accepted ※ 11 June 2021       issue date ※ 21 August 2021  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)