新型史密斯-帕塞尔效应可调辐射源研究  

Novel Smith-Purcell Tunable Radiation Source

作　　者：陈嘉钰[1] 王明红[1] 杨梓强[1] 兰峰[1] 梁正[1] 

机构地区：[1]电子科技大学高能电子学研究所,四川成都610054

出　　处：《中国激光》2004年第11期1289-1292,共4页Chinese Journal of Lasers

摘　　要：提出采用中等能量的相对论环状电子注激励轴对称三曲面反射镜、绕射光栅系统,产生毫米波、远红外波段辐射的新型准光学可调辐射源实验方案,这是一种基于史密斯帕塞尔效应的自由电子激光。由于引入新型准光学谐振腔系统,可以改变能量输出方向的角度,从原理上讲,可制造一系列模型,产生可调频率的短毫米波、远红外波段相干辐射。采用环状电子注比带状电子注稳定性高,便于成型和聚焦;采用新腔体后增长了电子注与高频场的互作用范围;新型准光腔具有较小的绕射损耗。新方案的这些特点,进一步提高器件的输出功率,改善了高频特性。介绍这种新辐射源在3mm波段的粒子模拟计算初步结果,其输出功率达数百千瓦以上;同时给出准光学谐振腔高频系统的模拟计算和冷测实验的典型曲线。A novel Smith Purcell tunable radiation source with relativistic electron beam of middle energy and a quasi optical resonator composed of diffraction grating and three mirror reflector is reported. The well known Smith Purcell free electronic laser (FEL) experiment takes on a good future for developing submillimeter and far infrared wave source. The novel scheme has considerable advantages as follows: ring beam enable more high beam current to transmit steadily and to be taken shape easily; axial symmetrical quasi optical cavity has a small loss, so the output power and efficiency can be improved evidently. The developments of spectrum source based on Smith Purcell effect have attracted one′s much attention. Theoretical analyses and numerical simulation results indicate that coherent radiation with peak power of a few hundred of kW can be achieved from this experimental model. The typical curve of quasi optical cavity simulation and cool testing experiment are also given.

关 键 词：光电子学 相对论电子注 准光学谐振腔 史密斯-帕塞尔效应 自由电子激光 

分 类 号：TN248.6[电子电信—物理电子学]