Speaker
Zhangfeng Gao
(Shanghai Synchrotron Radiation Facility)
Description
Circularly polarized free electron laser (FEL) pulses are strongly demanded to satisfy plenty of experiments, but static magnetic elliptically polarized undulators(EPU) are too limited to achieve shorter undulator periods. In this paper, the potential of polarization control using the radio frequency (RF) undulator afterburner is discussed for Shanghai soft X-ray FEL user facility(SXFEL-UF). The parameters of the afterburner in the 2nm undulator line are obtained by theoretical predictions and numerical simulations. Then the general description of the proposal, and the optimization of the RF undulator cavity are presented. The coupler design is still in progress, leaving more work to do for a proper rotating electromagnetic field.
Author
Zhangfeng Gao
(Shanghai Synchrotron Radiation Facility)
Co-authors
Chao Feng
(Shanghai Advanced Research Institute)
Haixiao Deng
(Shanghai Institute of Applied Physics)
Kaiqing Zhang
(Shanghai Synchrotron Radiation Facility)
Tao Liu
(Shanghai Advanced Research Institute)
Xiaoxia Huang
(Shanghai Synchrotron Radiation Facility)
Zheng Qi
(Shanghai Advanced Research Institute)
