Study On The Beam-wave Interaction Simulation Of Terahertz High Power Gyrotron

In controlled nuclear fusion energy,to realize the fusion ignition,you need to make the plasma temperature increased to more than 10000 electron volts,and wave heating is plasma heating(plasma heating),a kind of important method,the tube can provide high frequency and high power electromagnetic wave,therefore in the international nuclear fusion reactor(ITER),under the push of the relevant frequency,such as 110 GHZ,140 GHZ,170 GHZ got rapid development.In this paper,the preliminary simulation design of 170 GHz high power gradient composite cavity gyrotron oscillator tube is made as follows:(1)The basic principle of gyrotron is introduced,the development of gyrotron with 170 ghz is introduced,and the main technical problems are described.(2)Aiming at the field distribution solution and simulation in the gradually changing composite cavity,the high-frequency characteristics of the 170 GHz gradually changing composite cavity gyrotron were simulated by using the transmission line equation based on the mode coupling theory and the preliminary cold chamber size of the gyrotron was analyzed and designed.(3)To analyze its note wave interaction,first by linear(small signal)theory to analyze the preliminary parameters of tube in work,and simultaneous solution of relativistic electron motion equation and active of maxwell's equations based on wave interaction self-consistent mathematical description of the nonlinear theory,combining the numerical simulation of electronic voltage,current,magnetic field and the main structure parameters on the efficiency of beam-wave interaction and the field distribution are analyzed;Finally,the parameters of the cavity are determined.