Three-dimensional Particle-in-cell Simulation Study of a Frequency Tunable Relativistic Magnetron
Three-dimensional Particle-in-cell Simulation Study of a Frequency Tunable Relativistic Magnetron
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DOI：
10.1109/tdei.2007.4286546
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发表时间：
2007-08
影响因子：
3.1
通讯作者：
H. Kim;J. Choi
中科院分区：
文献类型：
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作者：
H. Kim;J. Choi
利用三维粒子模拟程序MAGIC 3D对带有金属调谐器的A6相对论磁控管进行了数值模拟。当在高频磁场强的区域插入六根导电棒时，A6磁控管的2 pi模（n=6）的谐振频率在4.27 ~ 4.47 GHz的范围内调谐。仿真结果表明，在金属调谐器产生扰动射频磁场的情况下，A6磁控管在辐射输出功率、频谱和效率方面的性能上级均匀射频磁场。在4.4GHz频率下，A6磁控管的最大输出功率为600 MW，磁控管效率为7.2%，比轴向磁场为5.5kG、束流电压为360 kV、总电流为23 kA的常规A6磁控管高出约20%。当三个金属杆的调谐器位置为8 cm时，其被调节以获得最大功率，π模式中的谱幅度在功率上比2 pi模式低33 dB。
A three-dimensional particle-in-cell (PIC) code, MAGIC3D, is used to simulate an A6 relativistic magnetron with metal tuner. As inserting six conducting rods into the resonators in regions where the RF magnetic field is high, the resonant frequency of 2pi-mode (n=6) of the A6 magnetron is tuned over the range from 4.27 to 4.47 GHz. The simulations show that with perturbed RF magnetic fields caused by metal tuner, the performance of the A6 magnetron in terms of radiation output power, frequency spectrum, and efficiency is superior compared with those using the uniform RF magnetic fields. Maximum output power of A6 with three tuners is 600 MW at 4.4 GHz, corresponding to a magnetron efficiency of 7.2%, which is about 20% higher than the conventional A6 magnetron where the axial external magnetic field is 5.5 kG and the beam voltage and the total current are 360 kV and 23 kA, respectively. When the tuner position of three metal rods is 8 cm, which is adjusted to get maximum power, a spectral amplitude in the pi-mode is lower 33 dB in power than the 2pi-mode.