基于微型谐振腔的史密斯-帕赛尔自由电子激光  

Smith-Purcell Free Electron Laser based on Micro-Resonator

作　　者：孟现柱 王明红 孙桂芳 吴立恒 MENG Xian-zhu;WANG Ming-hong;SUN Gui-fang;WU Li-heng(School of Physics Science and Information Engineering,Shandong Provincial Key Laboratory of Optical Communication Science and Technology,Liaocheng University,Liaocheng 252059,China)

机构地区：[1]聊城大学物理科学与信息工程学院山东省光通信科学与技术重点实验室,山东聊城252059

出　　处：《聊城大学学报（自然科学版）》2018年第4期48-51,共4页Journal of Liaocheng University:Natural Science Edition

基　　金：国家自然科学基金项目(11275089)资助

摘　　要：研究了一种由电子枪、微谐振腔、金属光栅和集电极组成的新型史密斯-帕赛尔自由电子激光.利用PIC三维模拟,讨论了该装置的特点.发现在合理的电子能量和光栅参数下,该装置可以产生THz频率范围内的相干高功率脉冲SPR.研究结果表明,当电子束能量E=50keV,电子束电流I=10A时,光栅周期L=0.3mm时,可以得到功率在4 000W左右、脉冲为0.25ns的514.643GHz的太赫兹辐射.A novel Smith-Purcell free electron laser composed of an electron gun, a micro-resonator, a metallic grating and a collector is investigated. The characteristics of this device are discussed with the help of three-dimensional particle-in-cell simulation. In this device, coherent and high power Smith-Purcell radiation at Terahertz frequency range can be produced for the reasonable parameters of charge energy and grating. Our results indicate that 0.25 ns pulsed Terahertz radiation at 514.643 GHz with a power around 4 000 W can be obtained for a grating of period l =0.3 mm operating at the beam energy E =50 keV, beam current I =10 A.

关 键 词：太赫兹 史密斯帕赛尔辐射 PIC模拟 谐振腔 光栅 

分 类 号：O463.1[机械工程—光学工程]