Simplified model for fast optimization of a free-electron laser oscillator

Kai Li, Minghao Song, Haixiao Deng
2017 Physical Review Accelerators and Beams  
A simplified theoretical model for free-electron laser oscillator (FELO) simulation which reserves the main physics is proposed. In stead of using traditional macro particles sampling method, the theoretical model takes advantages of low gain theory to calculate the optical power single-pass gain in the undulator analytically, and some reasonable approximations are made to simplify the calculation of power growth in the cavity. The theoretical analysis of single-pass gain, power growth,
more » ... wer growth, time-dependent laser profile evolution and cavity desynchronism are accomplished more efficiently. We present the results of infrared wavelength FELO and X-ray FELO with the new model. The results is checked by simulation with GENESIS and OPC which demonstrates the validity of the theoretical model.
doi:10.1103/physrevaccelbeams.20.030702 fatcat:qguno6xdonbtllvdg2q4xu54cq