Author: Li, Z.B.
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MOPIK088 Vertical Emittance Reduction in the SSRF Phase II Project 733
 
  • C.L. Li, B.C. Jiang, Z.B. Li, M.Z. Zhang, Q.L. Zhang, W.Z. Zhang
    SINAP, Shanghai, People's Republic of China
 
  The Shanghai Synchrotron Radiation Facility (SSRF) Phase II beamline project (SSRF Phase II) will implement the new lattice with dual-canted insertion devices, superbends and superconducting wiggler. The emittance coupling is one of the most important parameters for the high brightness storage ring light sources. It is often less than 1% in the third-generation storage ring light sources. In this paper, the sensitivity of emittance coupling to magnetic alignment errors in the SSRF Phase II is presented. Sixty skew quadrupole magnets are utilized to correct the emittance coupling with gradient descent algorithm. The emittance coupling obtained in the SSRF Phase II lattice is below 0.3%.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK088  
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TUPIK069 PXIe Embedded Control Station Based the Electric Breakdown Data Acquisition and RF Conditioning System for C-Band Accelerating Structures Using for Shanghai Soft X-Ray Free Electron Laser (SXFEL) 1855
 
  • Y. Li, W. Fang, J.Z. Gong, Q. Gu, J.J. Guo, L. Li, Z.B. Li, J.H. Tan, C.C. Xiao, J.Q. Zhang, M. Zhang, Z.T. Zhao
    SINAP, Shanghai, People's Republic of China
 
  Funding: Shanghai Institute of Applied Physics, The Chinese Academy of Science., National Development and Reform Commission, the People's Republic of China., National Natural Science Foundation of China.
Shanghai Soft X-Ray Free Electron Laser (SXFEL) adopts C-band structure to accelerate the electron to 1.5-GeV. Due to high gradient operation, the electric breakdown and structure conditioning problems need to be perfectly resolved. For this purpose, we develop an automatic conditioning control and electric breakdown data acquisition system. The control based on a PXI Express (PXIe) embedded frame and the LabView-FPGA technique. The prototype system design, the software programming and hardware test will be introduced. The experiment setup and test results for a low-level signal will be shown.
' Corresponding author: liyingmin@sinap.ac.cn
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK069  
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THPIK067 A C-Band Compact Spherical RF Pulse Compressor for the SXFEL Linac Energy Upgrade 4248
SUSPSIK094   use link to see paper's listing under its alternate paper code  
 
  • Z.B. Li, W. Fang, Q. Gu, Z.T. Zhao
    SINAP, Shanghai, People's Republic of China
 
  A new compact C-band (5712 MHz) spherical RF pulse compressor has been designed for Shanghai Soft X-ray Free Electron Laser (SXFEL) facility energy upgrading at Shanghai Institute of Applied Physics (SINAP), Chinese Academy of Sciences (CAS). This pulse compressor contains one high Q0 spherical RF resonant cavity which works on two TE113 modes and a novel coupler. As there is only one storage cavity, this pulse compressor can be much smaller than the traditional SLED. With the coupling coefficient 4.9, the average power gain can be as high as 3.8. In this paper, the scheme of the C-band spherical pulse compressor and RF design are presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPIK067  
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THPIK068 High Power Test of SINAP X-Band Deflector at KEK 4251
 
  • J.H. Tan, W. Fang, Q. Gu, X.X. Huang, Z.B. Li, Z.T. Zhao
    SINAP, Shanghai, People's Republic of China
  • T. Higo
    KEK, Ibaraki, Japan
  • D.C. Tong
    TUB, Beijing, People's Republic of China
 
  A crucial RF structure used for bunch length measurement for Shanghai X-ray Free Electron Lasers (SXFEL) at the Shanghai Institute of Applied Physics (SINAP), Chinese Academy of Science [1]. The design, fabrication, measurement and tuning have been completed at SINAP [2], and the high power test was carried out at Nextef of KEK with international collaboration. This paper presents the RF conditioning process and test results.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPIK068  
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