强激光与粒子束, 2017, 29 (9): 093004, 网络出版: 2017-08-30
强流多注阴极尺寸对束流发射一致性的影响
Effect of multi-beam cathodes’ geometric size on emission uniformity of electron beams
多注电子束 高功率速调管 二极管 阴极 电子束品质 multiple electron beams high power klystron diode cathode electron beam quality
摘要
在相对论速调管放大器(RKA)的探究实验中, 多注RKA中电子束的打斑实验结果表明各注电子束的发射电流大小和横截面形状分布不一致甚至有很大差异影响了RKA的工作稳定性。通过粒子模拟软件对该问题进行相关仿真研究, 探究多注阴极几何尺寸分布不一致对发射电流分布的影响。仿真结果表明, 单注电子束阴极尺寸, 尤其是横向尺寸的差异是影响多注电流大小分布不一致的主要因素, 而且横向尺寸还将影响到多注电子束横向电子束形状, 该研究对多注RKA的实验研究与优化设计具有指导意义。
Abstract
During the experiment research of the Relative Klystron Amplifier(RKA) we found that there were huge differences between currents and the forms of every electron beam. We made a research on this problem with PIC simulation software to investigate the effect of geometric size on the emitted electron beam distribution, which indicates that difference of geometric size between multi-beam cathodes, especially the radial difference, is the main factor causing the multi-beam asymmetry. Besides, the cross section of electron beams has a certain relation with the radius of the cathodes.
李乐乐, 黄华, 刘振帮, 何琥, 王淦平. 强流多注阴极尺寸对束流发射一致性的影响[J]. 强激光与粒子束, 2017, 29(9): 093004. Li Lele, Huang Hua, Liu Zhenbang, He Hu, Wang Ganping. Effect of multi-beam cathodes’ geometric size on emission uniformity of electron beams[J]. High Power Laser and Particle Beams, 2017, 29(9): 093004.
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