X波段带状注速调管注波互作用系统的3维PIC模拟  

3D Particle-in-Cell Simulation of X-Band Sheet Beam Klystron

作　　者：阮望[1,2] 王勇[1] 丁耀根[1] 阮存军[1] 

机构地区：[1]中国科学院电子学研究所,中国科学院高功率微波源与技术重点实验室,北京100190 [2]中国科学院研究生院,北京100039

出　　处：《真空科学与技术学报》2009年第4期375-379,共5页Chinese Journal of Vacuum Science and Technology

基　　金：国家自然科学基金(No.60501019,No.10775139);中国科学院知识创新工程青年人才领域前沿项目资助

摘　　要：带状注速调管是采用宽高比值很大的薄矩形注来降低空间电荷效应,采用特殊的高频结构来增加功率容量,从而使注波互作用效率得到提高的一种新型微波电真空器件。本文对工作在π模状态下的X波段带状注速调管三间隙腔进行了模拟计算,并对由该型腔体构成的注波互作用系统进行了3维PIC模拟,给出了初步的模拟设计结果。模拟结果表明:在电子注电压为415kV,电流为250A时,该速调管可以获得大于29.6MW的输出功率、34.3dB的增益以及29.6%的效率。The beam-wave interaction system with five three-cell, extended interaction cavities in the X-band sheet beam klystron, working in π mode, was simulated with two commercial available software packages of 3-dimensional particle-in-cell （PIC） and Computer Simulation Technology（CST）. In the simulation, realistic conditions, including the non-axial symmetry structure of the sheet beam,moving charge-induced electric field, and space charges, were considered. The preliminary,simulated results show that for a 415kV,250A sheet beam,the sheet beam klystron is capable of generating an output power higher than 29.6 MW with a gain of 34.3 dB and a maximmn efficiency of 29.9 % at a frequency of 11. 425GHz. The design considerations and potential applications of the sheet beam klystron, a novel microwave vacuum device using a high aspect ratio, thin rectangular beam to reduce space charge, were also tentatively discussed.

关 键 词：X波段 带状注速调管 3维PIC模拟 三间隙扩展互作用腔 

分 类 号：TN122.4[电子电信—物理电子学]