Research Of Electron Cyclotron Maser Electron Optical System

Due to the influence of traditional microwave vacuumm devices, such as the structure and working mechanism, people met a lot of restrictions in the millimeter wave band studies. However, cyclotron devices with electron cyclotron maser instability as a mechanism that can produce high gain and high power, pulsed signals in the millimeter-wave band. Therefore, since the gyrotron with the advantages of high power and high efficiency, which has a broad development prospects in the field of science and technology in millimeter wave. The band of millimeter wave is located between the infrared and microwave, compared with ordinary microwave systems, millimeter-wave systems are easy to integrate, and it plays an important role in the military and industrial development. In recent years, research on gyrotron attracts widespread international attention, the United States, Britain, Germany, Russia, France, Japan and Switzerland and other countries paid a lot of effort in research on gyrotron, some research institutions of China are also doing related researches. Magnetron injection gun is an important part of the gyrotron and research on magnetron electron gun is also one of the key technologies of gyrotron design. This paper focuses on the reseaech on magnetron injection gun and use the particle simulation software simulate and optimize the dates. And analyse the main parameters which affect the performance of the electron beam to provide a theoretical basis for the design of the electron gun. The main contents of this paper are as follows:1. Elaborated theory and calculation method of the electron-optical system based on the theory of electron optics and electromagnetic field.2. Discussed the basic working principle of magnetron injection gun and analyzed the electron gun system; introduced the design ideas of electron gun and optimization methods and discussed the initial design method of magnetron electron gun.3. Simulate and optimize the dates of the electron gun and designed a single-anode magnetron injection gun for a w-band and D-band gyrotron successfully. On this basis, analyzes the impact of electrical parameters and structural parameters on the performance of the electron beam, such as how electromagnetic field and the geometric structure influence the electron gun velocity ratio,the electron beam guiding center radius and velocity spread.4. Studied the collector system of gyrotron and describes the basic working principle of the collector, analyzed the impact on the collector. Then discussed the realizing method of defocus action of the collector.