Electron Cyclotron Resonance Maser Pic Simulation

Gyrotron is an important high-power microwave resource that has been applied in many fields such as radar, communication and high-power microwave weapon. Compared with the traditional Gyrotron ECRM can greatly reduce the requested magnetic field on the condition of the same frequency. And what is more, ECRM enjoys the higher frequency in contrast of the free electron laser. Due to the fact that ECRM is featured by high proficiency and laser frequency, ECRM can get several hundreds megawatt power and proficiency above 20%.The method of PIC(particle-in-cell) simulation is very important in the computational physics. It has great advantage in the research on the linear and nonlinear physical mechanism. The successful application used to explore the process of the interaction between field and electrons has proved to be excellent. In the thesis I develop a program that focuses on the TE's mode and TM's mode. Such program can be used to study the field distribution, Q quality and resonant frequency when there are no electrons. At the same time several kinds of Gyrotrons are selected as experimental modes to confirm the validity of the program. For example three kindsof Gyrotrons are devised including Gyrotron whose working mode is TMn and resonant frequency is 31.5-GHz, Gyrotron of TE22and 24. 14G-Hz and Gyrotron amp I if ier of TE62 and 39. 994GHz . I use the program to simulate the instabilitiesof TE's mode and TM's mode. I get some results such as field distribution and velocities bunching that coincide with the theory. Furthermore some new data are gotten to reveal the inner mechanism of such physical phenomena.