平行多注电子枪的研究

发布时间：2018-08-26 09:21

【摘要】：到目前为止微波电子学已经经过百余年的发展,现在已经建立起了比较完整的理论体系,这使得微波电真空器件成为了现代科技发展的重要组成部分。电子枪作为微波电真空器件的重要组成部分,同时也是微波电真空器件的心脏,它的设计对整个器件的各个参数有着决定性作用。随着技术的不断发展,由最初的皮尔斯电子枪,到现在多种多样的新型电子枪,各种电子枪层出不穷,以满足更高频率,更高效率,更高增益,小型化,响应时间短等要求。多注电子枪和带状注电子枪应运而生,多电子注技术能有效降低工作电压,同时多电子注电子枪在比较低的工作电压下的功率比单电子注电子枪的功率更高,作为新型的电子枪多注电子枪是研究热点,它的设计显得尤为重要。本论文研究的是平行电子注的产生和控制电子注传输的聚焦系统,聚焦系统的主要作用是平衡电子注的空间电荷力,以维持电子注保持一定形状,以避免电子注被高频结构截获,保证其良好的流通性。首先分析了强流电子光学系统的基本原理和强流电子枪的重要参数,然后对平行多注电子枪进行设计和仿真。通过需求分析确定电子枪各个参数,然后在CST中进行粒子仿真验证,得到理想的平行多注电子光学系统。然后对几种聚焦磁场理论进行了简单的理论推导,对所设计的平行多注电子光学系统的聚焦传输进行设计和仿真,具体包括三种聚焦磁场分别是:均匀磁场,PCM磁场和wiggler磁场,分析了不同电子轨迹形成的原因,总结了聚焦磁场对平行多注电子注的聚焦规律,获得了满足要求的平行多注电子枪的磁系统。
[Abstract]:Up to now, microwave electronics has been developed for more than 100 years, and a relatively complete theoretical system has been established, which makes microwave vacuum devices become an important part of the development of modern science and technology. As an important part of microwave vacuum device, electron gun is also the heart of microwave vacuum device. Its design plays a decisive role in all the parameters of the device. With the continuous development of technology, from the initial Pierce electron gun, to now a variety of new electronic gun, a variety of electron guns emerge in order to meet the higher frequency, higher efficiency, higher gain, miniaturization, short response time and other requirements. Multi-beam electron gun and banded electron gun emerge as the times require. Multi-electron beam technology can effectively reduce the working voltage. At the same time, the power of multi-electron beam electron gun is higher than that of single electron beam electron gun at lower working voltage. As a new type of electron gun with multi-beam electron gun, its design is very important. In this paper, we focus on the generation of parallel electron beam and the control of electron beam transmission. The main function of the focusing system is to balance the space charge force of the electron beam in order to keep the electron beam in a certain shape. In order to avoid the electron beam being intercepted by the high frequency structure, guarantee its good circulation. The basic principle of the high current electron optical system and the important parameters of the high current electron gun are analyzed, and then the parallel multi beam electron gun is designed and simulated. The parameters of the electron gun were determined by requirement analysis, and then the particle simulation was carried out in CST to obtain the ideal parallel multi-beam electron optical system. Then, several theories of focusing magnetic field are deduced, and the focusing transmission of parallel multi-beam electron optical system is designed and simulated, including three kinds of focusing magnetic field: homogeneous magnetic field and wiggler magnetic field, respectively. The causes of the formation of different electron trajectories are analyzed, and the focusing rules of the focusing magnetic field for parallel multi-beam electron beams are summarized, and the magnetic system of parallel multi-beam electron guns is obtained.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN103

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