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Zhao, K.

Paper Title Page
MO6RFP085 Study of Transverse Emittance Evolution in 3.5-Cell DC-SC Photo-Injector 568
 
  • W. Xu, S.W. Quan, K. Zhao, J. Zhuang
    PKU/IHIP, Beijing
  
 

High quality electron beam with low transverse emittance in 3.5‐cell DC‐SC photo‐injector is crucial significance for PKU‐ERL‐FEL facility. In this paper, we analyse the emittance evolution in the 3.5‐cell DC‐SC photo‐injector by simply model with consideration of DC acceleration, RF acceleration and space charge effect. The results are compared with Astra simulation. The matching condition of DC‐gun and Superconducting cavity, which is critical for the final emittance at the exit of the injector, is also presented.

  
WE5PFP045 Analytical and Experimental Study of Crosstalk in the Superconducting Cavity 2098
 
  • F.S. He, J.K. Hao, F. Wang, W. Xu, B.C. Zhang, K. Zhao
    PKU/IHIP, Beijing
  
 

Funding: Supported by National Basic Research Program(No. 2002CB713600) and NSFC(No. 10775010).


The 3.5-cell cavity for the PKU DCSC photoinjector requires the main coupler and the pickup be on the same side of the cavity, which will cause crosstalk between them. At room temperature, serious distortion of the RF response is caused. This paper applies a clear understanding of the RF signal; numerical and experimental study shows that the crosstalk will be negligible in superconducting (SC) status. Furthermore, a method to calculater resonant frequency and loaded quality factor from the crosstalk signal is provided

  
WE5RFP036 The PKU Terahertz Facility at Peking University 2343
 
  • K. Yu, S.W. Quan, W. Xu, K. Zhao, F. Zhu, J. Zhuang
    PKU/IHIP, Beijing
  
 

The PKU Terahertz facility (PTF) is planned as a compact, high power Terahertz user facility based on the coherent undulator radiation concept and the superconducting radiofrequency technology for the linear accelerator. By utilizing a 3.5-cell DC-SC (DC-Superconducting) photoinjector, the PTF will provide high average power, coherent terahertz radiation with quasi-monochromaticity and wavelength tunable between 400um ~ 1200um, serving as a powerful tool for frontier researches and practical applications in the THz realm. Key components of the 3.5-cell DC-SC photoinjector have been prepared and the beamline is under construction. In this paper, the technical layout of the injector and the conceptual design of the PTF will be presented.