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为了打破传统回旋管数值模拟所采用的回旋发射产生理想电子束的局限性,本文在理论分析94GHz双阳极磁控注入式电子枪的结构参数的基础上,通过共形FDTD算法对网格划分进行优化,得到了具有横纵速度比为1.42,最大速度零散为5.92%的高性能电子束,并将此优化后的电子枪取代传统回旋管数值模拟时采用的回旋发射进行该94GHz回旋管系统的数值模拟,并采用MPI四进程并行计算,最终获得了具有TE03模、94GHz、平均输出功率约在40kW、效率达到10.5%的高性能回旋振荡管.
In order to break the limitation of the ideal electron beam generated by the conventional gyrotron to simulate the cyclotron emission, based on the theoretical analysis of the structural parameters of the 94GHz dual anode magnetron injection electron gun, the gridding is optimized by the conformal FDTD algorithm , A high performance electron beam with a longitudinal velocity ratio of 1.42 and a maximum velocity dispersion of 5.92% was obtained. The optimized electron gun was used to replace the conventional gyrotron numerical simulation to simulate the 94GHz gyrotron system , And the MPI quadruple process was used in parallel calculation. Finally, a high performance gyrotron with TE03 mode and 94GHz average output power of about 40kW and efficiency of 10.5% was obtained.