强流相对论电子束群聚的空间电荷波理论分析  

Space-charge Wave Physics Relevant to Modulation of Intense Relativistic Electron Beams

作　　者：黄华[1] 常安碧[1] 谭杰[1] 马乔生[1] 甘延青[1] 江金生[1] 

机构地区：[1]中国工程物理研究院应用电子学研究所,四川绵阳621900

出　　处：《电子科技大学学报》2001年第1期53-57,共5页Journal of University of Electronic Science and Technology of China

基　　金：国家科委863高科技项目

摘　　要：介绍了在长脉冲强流相对论速调管(RKA)研究中强流相对论空心电子束(IREBs)的一种小信号群聚理—空间电荷波理论。建立了IREBs在漂移管中传输的色散方程，以及IREBs与RKA输入腔间隙电场相互作用和IREBs在漂移管中群聚传输的传输线模型，获得了电子束经过输入腔间隙后产生的调制电流表达式。利用500 kV、3 kA、脉宽约1.4 (s的空心电子束，注入70 kW的微波调制，束流经过输入腔后，得到了约9.8％的基波电流调制深度，研究结果与理论分析基本一致。A small signal theory——space charge wave physics relevant to modulation properties of intense relativistic electron beams in klystron amplifiers is described in this paper. The properties are the dispersion equation of IREBs drifting in the tube, and the transmission line model of IREBs interacting with the gap electrical field of input cavity of RKA and bunching in the drift tube. The expression of modulated current after the gap of input cavity is got, which is content with the experimental results. In experiment，a voltage 500 kV,current 3 kA, pulse width 1.4 (s hollow electron beam modulated by 70 kW input microwave power generates 9.8% modulated current, and it is content with the results of theory.

关 键 词：速调管 空间电荷波理论 强流相对论 电子束群聚 

分 类 号：TN122.01[电子电信—物理电子学] TN128