.300 Ghz, Roundabout Single Chamber Pipe Interaction System

With the further research on all kinds of microwave components, they've been greatly applied and developed at the microwave band. When working frequency has been promoted at the band of millimeter and sub millimeter, for the deficiency both in structures and materials and working mechanisms, common microwave tubes are frustrated at this band for working, especially for enhancing the efficiency and output power. However, the emergence of gyro components breaks the traditional mechanism of microwave tubes and hence solves the problems and difficulties that have been encountered for long. The exploration and utilization at the band of millimeter and sub millimeter brings a promising future in vacuum electronics field and dramatically put this discipline forward as well.The fast wave device gyrotron is base on the radiation theory which is excitated by electrons cyclotron resonance. Its frequency is very high especially at the millimeter and sub-millimeter wave band. And it can produce high output power in pulse and continuum wave. It can be used in plasma heating, accelerator, radar, communication, electron rivalry, microwave weapon and so on.The THz radiation resource is one of the many emphases researching item in THz technique at international academe recent years. Because the THz is between the millimeter wave and the infrared, it is difficult to produce the THz radiation resonance. But the application such as the radars and far distance detecting need great power THz resource. The gyrotron is the only device who can produce great power THz wave.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.The article investigate 300GHz gyrotron,the aim is to research the relation of parameter. it can provide some referenced worth for THz resource.Firstly,the author researches the structure and principle of the gyrotron. theory model is based on the electrons kinetic equation, high frequency field equation. Base on the research of theory, computer code to carry out to calculate has been developed along with the theory,so therelation of parameter of the gyrotron has been know, through HFSS the author simulate the cold cavity.Finally,using the method of PIC,the author simulating the gyrotron which parameter is calculate ,I get some results such as the field distribution,frequency and so on.It can provide some reference for the design and fabrication of THz radiation resonance.