新型史密斯-帕塞尔自由电子激光实验

Experiment of a Novel Smith-Purcell Free Electron Laser

介绍一种新型的Smith PurcellFEL实验 ,实验中利用中等能量级的相对论电子束激励 ,由衍射光栅和三反射镜组成的新型准光学系统 ,可以产生可调短毫米波、远红外波段的辐射。主要实验参数为 :电子注能量为 40 0～ 5 0 0keV ,电压脉冲宽度 70ns ,同步脉冲磁场强度 1.2T ,成功地检测到 3mm波段的毫米波信号 。

This paper describes a novel Smith-Purcell FEL experiment with a relativistic electron beam of middle energy and a quasi-optical resonator composed of diffraction grating and three-mirrors reflector. Coherent radiation with peak power of a few tens of kW at 3 mm waveband is successfully detected from the experimental facility characterized by beam energy of 400-500 keV, pulse length of 70 ns, pulse beam current of 0.2 kA, and pulse magnetic field of up to 1.2 T.