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Tang C.X.

PaperTitlePage
TUP35Impedance Simulation and Waveguide Damping Study of a Superconducting Deflecting Cavity for ALS at LBNL210
 
  • J. R. Shi, H. B. Chen, C. X. Tang, S. X. Zheng
    Tsinghua University
  • D. Li
    LBNL
 
 Superconducting deflecting cavities are proposed for the generation of sub-pico-second X-ray pulses in storage ring. A 2-cell structure has been simulated to achieve required deflecting voltage and damping waveguide is attached on beam pipe to get low impedance. Detailed simulation notes to calculate longitudinal and transverse impedance in MAFIA and result of different configurations of the damping waveguides are presented. 
TUP54Field Tuning and HOMs Measurement of the 9-cell ICHIRO Copper Cavity Model251
 
  • J. Wu, Q. Z. Xing, J. R. Shi, S. X. Zheng, D. C. Tong, C. X. Tang
    Tsinghua University
 
 Field tuning and HOMs measurement of a 9-cell superconducting ICHIRO copper cavity model is presented. The field flatness 97.2% of the TM010_PI mode is obtained after a few iterations by inserting perturbation objects into the cells. The frequencies and shunt impendence of the higher order modes (HOMs) are measured and compared with the numerical simulation of the cavity using Mafia 2D code.