• Q.K. Jia, H. Geng, H.T. Li
  USTC/NSRL, Hefei, Anhui

An easy-to-implement scheme called Enhanced High Gain Harmonic Generation has been proposed and shown to be able to significantly enhance the performance of traditional HGHG-FEL. In this paper we investigate the effects of the system parameters in EHGHG scheme, such as the electron energy tuning, the energy spread, the dispersive strength, amount of the phase shift, and the power of seed laser. The numerical results are presented, and shown that: the EHGHG scheme has acceptable the parameters tolerance requirements and is not more or even less sensitive to the system parameters than that of the existing scheme.