THEORETICAL ANALYSIS OF AN RAMAN FREE ELECTRON LASER EXPERIMENT WITHOUT AXIAL MAGNETIC FIELD
无引导磁场Raman自由电子激光实验的理论分析

In this paper, the self-focusing processes and ability of helical wiggler, which is often used in Raman Free Electron Laser experiment,, are analyzed. And the conditions for steady beam transportation are given and compared with the Raman FEL experiment beam data. In addition, the theoretical analysis of EPA-74 FEL radiation is presented, which is in agreement with the experimental results.