A four-beam electron gun has been designed using OPerating environment for Electromagnetic Research and Analysis (OPERA) 3-D to demonstrate the dependence of beam focusing on the thickness and the radial position of anode aperture in a pole piece with reference to the gun axis. The study is important in the sense that focusing the off-axis electron beamlets are a bit difficult with a common focusing system. The OPERA simulated results have been also compared with computer simulation technique simulated results. An example of four-beam electron gun to deliver a total of 428-mA (107 $times$ 4) current at 6-kV beam voltage has been considered for carrying out the aforementioned study. The four electron beamlets are generated through four individual cathodes, surrounded by electrically isolated four beam focusing electrode and corresponding four individual anodes and a common focusing system.
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机译:使用用于电磁研究与分析(OPERA)3-D的工作环境设计了四束电子枪,以证明电子束聚焦于极靴中阳极极孔的厚度和径向位置(相对于电子枪轴)的依赖性。就使用普通聚焦系统聚焦离轴电子子束有点困难的意义而言,这项研究很重要。 OPERA模拟结果也已与计算机模拟技术模拟结果进行了比较。为了进行上述研究,已经考虑了一个以4束电子枪在6 kV束电压下提供总共428 mA(107 x 4)电流的例子。四个电子子束是通过四个单独的阴极生成的,这些阴极被电隔离的四个电子束聚焦电极和相应的四个单独的阳极以及一个公共聚焦系统围绕。
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