带Wiggler场平板型部分填充介质CFEL的切仑柯夫自由电子激光的动力学耦合模理论

用二维波动力学耦合模理论研究了带Wiggler场平板型部分填充介质的FEL。研究结果表明,该系统可用低能电子束产生对介质厚度无特殊要求的短波长FEL。适当选择参数,可使其增长率和效率高于普通自由电子激光和切仑柯夫自由电子激光,并证明本系统超辐射放大的工作主模应是纵向截面电场模。

KINETIC COUPLING MODE THEORY OF THE FLAT TYPE OF CFEL LOADING DIELECTRIC WITH WIGGLER

In this paper, the flat type of CFEL partialy loading dielectric with wiggler is studied using two dimensional kinetic coupling mode theory of three waves. It is shown that the system for arbitary thickness of dielectric can generate short wavelength coherent radiation by using low energy electron beam. Suitably choosing the system parameters, the growth rate of the kind of CFEL may be much higher than general FEL and CFEL. It is also shown that the main mode of super radiation in the system is LSE mode.