C波段相对论磁控管的三维粒子模拟研究

利用场论的方法推导了6腔扇形腔结构相对论磁控管的色散关系, 并用牛顿迭代法对色散关系进行了求解, 得到了色散关系曲线. 利用三维PIC粒子模拟, 对该结构的相对论磁控管分别进行了冷腔和热腔研究, 冷腔研究得到了π模谐振频率为2.42GHz, 与本文理论推导的色散关系有很好的一致性. 在热腔情况下, 电子能量为437keV, 电子束流为12.2kA, 外加磁场为0.6T, 模拟得到了频率

Three Dimensional PIC Simulation of a C-Band Relativistic Magnetron

The dispersion relation of a conventional 6-vane relativistic magnetron is derived and numerically calculated, which is employed to analyze the operating frequency of the device.Initial results of three-dimensional particle-in-cell simulation show that an average output microwave power of about 0.96GW at 4.5GHz is obtained at the beam energy of 437keV and current of 12.2kA when the externally applied magnetic field is about 0.6T.The efficiency is about 18%. An average output power of microwave about 4.4GW at 4.37GHz is also obtained at the beam energy of 1.05MeV and the current of 20.TkA when the structure parameters are improved.The efficiency is about 20%.