The results show that this FEL has high efficiency in mm and sub-mm waves with both axial and transverse kinetic energy lossing; the cavity radius is quite large.

• 结果表明,这种自由电子激光工作在毫米波段时,电子束在纵向及横向均有净动能交给信号波,具有很高的互作用效率(32%25);而且,腔体长度较短,腔体直径较大,易于加工制作。