新型史密斯-帕塞尔互作用结构中的辐射特性  

Radiation characteristics in a novel Smith-Purcell interaction structure

作　　者：滕丽丽[1] 陈蓓冉[1] 魏彦玉[1] 宫玉彬[1] 王文祥[1] 陈嘉钰[1] 

机构地区：[1]电子科技大学物理电子学院,大功率微波电真空器件技术重点实验室,成都610054

出　　处：《强激光与粒子束》2010年第7期1580-1582,共3页High Power Laser and Particle Beams

基　　金：四川省科技厅青年基金项目(M11010401ZQ026-046);国家自然科学基金项目(60532010)

摘　　要：新型史密斯-帕塞尔互作用结构是一个同轴型系统,它包括倒置的曲面镜和柱状光栅,并且光栅的截面可以是任意形状。用粒子模拟软件MAGIC对新结构进行模拟分析和优化,由于新结构采用倒置曲面镜,改变了光栅位置,大大增加了环状电子注半径,在同样电子注密度和厚度情况下,可以获得比改进前结构高几倍的电流,且辐射功率可提高1个数量级。并给出了新结构及改进前两种互作用结构在3 mm甚至更短波段的粒子模拟分析和计算结果,其输出功率达到数百MW以上。A novel Smith-Purcell interaction structure is presented. It is a coaxial structure including the outer curved mir- rors and the middle cylindrical gratings of arbitrary shaped section. Inverting the curved mirrors and changing the position of grat- ings turn the structure into the improved one, in which greater current can be obtained with bigger-radius ring beam. And the ra- diation power increases by one order of magnitude. Theoretical analyses and numerical simulation results indicate that coherent ra- diation with peak power of a few hundred of MW can be achieved from the improved experimental model.

关 键 词：准光学谐振腔 史密斯-帕塞尔效应 柱状光栅 倒梯形光栅 

分 类 号：TN124[电子电信—物理电子学]