研制出新型小周期波荡器，报道三毫米波拉曼自由电子激光器实验。采用1 cm周期双绕螺旋线波荡器，在相同加速器能量下，自由电子激光输出波长由8 mm缩短到3 mm。输出功率为1 MW，效率为0.66%。

It is reported that a novel small-period wiggler was developed. The experiments of a Raman free electron laser at 3 mm wavelength are presented. Using the bifilar helieal wiggler with 1 cm period, the wavelength of the free electron laser has been reduced from 8 mm to 3 mm with the same beam energy. The radiation power is 1 MW and the efficiency is 0.66 %.