一种复合腔回旋管注波互作用的数值模拟和分析

Simulation and Analysis of the Beam-Wave Interaction in a Complex Cavity Gyrotron with Gradual Transition

该文基于电磁粒子模拟技术,对一种Ka波段基波渐变复合腔回旋管振荡器的注波互作用过程进行了详细的模拟计算,分析了腔体几何参数、电子注半径、工作电流及工作磁场变化对互作用效率的影响,讨论了工作模式的稳定性。模拟结果表明,适当选择上述参数,在70kV,17A及速度比1.5的电子注推动下,平均功率可达716kW,互作用效率大于60%,且工作稳定。

In this paper, the beam-wave interaction of a Ka-band complex cavity gyrotron with gradual transition is studied according to a particle in ceil simulation program. The effect of the cavity dimension, electron beam parameter and operating magnetic field on the electron efficiency is analyzed. The stability of the working mode is discussed. The results show that an electron efficiency of more than 60% and good stability is predicted for the complex cavity gyrotron with appropriate working parameters when driven by a 70kV, 17A electron beam with a velocity ratio of 1.5.