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多注相对论速调管相对于常规相对论速调管,每注电子束具有更低的导流系数和更低的空间电荷力,却具有更高的束波转换效率.本文基于这方面的需求,通过三维软件模拟与实验研究了扇形多注强流相对论电子束的产生与传输.通过建立电子枪的三维模型,分析了阴极端面静电场的分布及其对电子束产生的影响;通过粒子模拟获得了发射束流,然后通过粒子跟踪仿真,得到了电子束在空心漂移管和多扇形孔漂移管中传输的束斑图,并对其进行了理论分析与解释.模拟和实验结果表明,电子束在空心漂移管传输过程中不仅绕束自身中心旋转,还绕系统的中心旋转,通过旋转多扇形孔漂移管实现对中的方法可提高传输效率.
Compared with the conventional relativistic klystrons, the multi-note relativistic klystrons have lower diversion coefficient and lower space charge per electron beam, but have higher beam-switching efficiency.Based on the demand of this aspect, The generation and transmission of the relativistic electron beam in the fan-shaped multi-shot strong stream were studied by the three-dimensional software simulations and experiments. The distribution of the electrostatic field at the cathode end and its effect on the electron beam were analyzed by establishing the three-dimensional model of the electron gun. And then the beam is transmitted through the particle tracing simulation, the beam pattern of the electron beam traveling in the hollow drift tube and the multi-fan drift tube is obtained and analyzed and explained theoretically.The simulation and experimental results show that the electron beam in the Hollow drift tube transfer process not only the center of the beam around its own rotation, but also around the center of the system rotation, by rotating the multi-fan drift tube centering method can improve the transmission efficiency.