四腔相对论速调管放大器的实验研究（英文）  

Experimental Study on a Four-Cavity Relativistic Klystron Amplifier

作　　者：廖旭[1] 李正红[1] 

机构地区：[1]西南科技大学理学院,四川绵阳621010

出　　处：《电子科技大学学报》2015年第4期524-527,共4页Journal of University of Electronic Science and Technology of China

基　　金：Supported by the National Natural Science Foundation of China under Grant(61271109)~~

摘　　要：针对杂频振荡的影响,在三腔相对论速调管的基础上发展了四腔高增益相对论速调管。采用PIC粒子模拟软件,从整管上对四腔强流相对论速调管放大器的冷腔结构、束波互作用、微波提取等方面进行研究。为得到输出功率和效率的最优值,结构上采用了低互作用输入腔,设计了阶梯状结构漂移管,通过对输出腔作用间歇进行优化处理等措施抑制了电子回流和杂频振荡的抑制,实现了器件在高增益下的GW级高功率微波输出。模拟表明整管微波模拟输出功率达3.05 GW、效率22%、增益63 d B(种子微波功率2 k W),该器件在实验上获得了增益为61.4 d B(种子微波功率1.38 k W)高功率微波放大输出,微波脉冲宽度大于100 ns。A four-cavity high gain relativistic klystron amplifier is developed on the basis of a three-cavity relativistic klystron. The mode control in a four-cavity relativistic klystron is studied theoretically together with particle in cell（PIC） simulation in the paper. And special methods are taken to suppress the nonworking mode＇s oscillation in the device which has an input cavity with low interaction impedance, ladder structured drift and etc. By optimizing the output cavity gap in PIC simulations, the output power of 3.05 GW and the gain of 63 d B（the seeding rf power 1.5 k W） of the discussed microwave structure are achieved. Finally the gain of 61.4 d B（the seeding rf power 1.38 k W） is achieved in the experiment, and its pulse duration is more than 100 ns.

关 键 词：高功率微波 模式控制 粒子模拟 相对论速调管 

分 类 号：TN61[电子电信—电路与系统] O53[理学—等离子体物理]