带状注行波管电子光学系统的设计与应用

发布时间：2018-06-26 07:33

本文选题：带状电子注 + 电子光学　；参考：《电子科技大学》2015年硕士论文

【摘要】：由于圆柱形轴对称电子注的局限性,导致其不能满足微波器件不断增长的频率,功率需求。带状电子注自上世纪90年代重新成为一个研究热点之后,就以其空间电荷场低,能传输大电流等独特优点正在不断的被人们开拓创新。因此研究带状电子注正成为一种趋势,正成为一种需要。带状注行波管的研究也是越来越受到重视,带状注电子光学系统则是其重要组成部分,对带状注行波管的性能有着很大的影响。目前带状注微波器件的主要难点在于带状注的传输聚焦方面,因此研究带状注电子光学系统就显得尤其必要。本文对带状电子注的产生,传输和收集极都进行了深入的研究,其工作的主要内容如下:一、总结了行波管带状注电子光学系统的基本结构与原理,以及带状注电子光学系统的基本理论,尤其是对几种聚焦磁场进行了聚焦理论的总结。二、采用间接法和直接法产生带状电子注,用磁四极子对圆柱形电子注进行压缩得到带状电子注,分析了主要参数对电子注的形态的影响;然后设计了椭圆面阴极电子枪产生了带状电子注。三、在带状电子注的聚焦传输上,研究设计了三种不同磁场对同一带状电子注的聚焦,包括均匀磁场、wiggler磁场和PCM磁场,分析了不同的电子轨迹形成的原因。总结了几种磁场对带状注的聚焦效果,分析了不同的应用情况。特别的提出了一种外侧凹槽wiggler磁场用于聚焦间接法产生带状电子注,其优势明显,作用显著。四、分别用两种不同的软件CST粒子工作室和MTSS对带状注的收集极进行设计研究,提出一种类菱形的两级降压收集极结构,仿真计算测试了其收集效果。并分析了采用降压收集极的原因以及静态流通条件下采用单级收集极的原因。通过本文的研究,让带状注电子光学系统的设计形成了一个整体,使其设计过程更加清晰容易,也为带状电子注的研究奠定了重要的基础。
[Abstract]:Due to the limitation of cylindrical axisymmetric electron beam, it can not meet the increasing frequency and power demand of microwave devices. Since the band electron beam has become a research hotspot since 1990s, it has been innovated continuously because of its unique advantages such as low space charge field, high current transmission and so on. Therefore, the study of band electron beam is becoming a trend and a need. More and more attention has been paid to the study of belt beam traveling wave tube (TWT), and the electron optical system is an important part of TWT, which has a great influence on the performance of TWT. At present, the main difficulty of the band beam microwave device is the transmission and focusing of the band beam, so it is necessary to study the electron optical system of the band beam. In this paper, the generation, transmission and collection of banded electron beam are deeply studied. The main contents of the work are as follows: 1. The basic structure and principle of the traveling wave tube tape beam electron optical system are summarized. The basic theory of electron-optical system with band beam is summarized, especially the focusing theory of several kinds of focusing magnetic field is summarized. Secondly, the band electron beam is produced by indirect method and direct method, and the band electron beam is obtained by magnetic quadrupole compression. The influence of main parameters on the shape of electron beam is analyzed. Then the elliptical cathode electron gun is designed to produce the band electron beam. Thirdly, the focusing transmission of the band electron beam is studied and designed, including the uniform magnetic field wiggler magnetic field and the PCM magnetic field, and the reasons for the formation of different electron trajectories are analyzed. The focusing effect of several magnetic fields on strip injection is summarized, and different applications are analyzed. In particular, a wiggler magnetic field with lateral grooves is proposed to produce band electron beam by focusing indirect method, which has obvious advantages and effects. Fourthly, two different software CST particle workroom and MTSS are used to design and study the collecting pole of strip injection, and a kind of diamond two-stage step-down collector structure is proposed, and its collection effect is tested by simulation calculation. The reasons of adopting the step-down collector and the single stage collector under static circulation are analyzed. Through the research in this paper, the design of the electron optical system of the strip beam becomes a whole, which makes the design process more clear and easy. It also lays an important foundation for the study of the electron beam.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN124

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