X波段磁绝缘线振荡器的数值模拟
Simulation investigation of X-band magnetically insulated line oscillator
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摘要: 在对磁绝缘线振荡器（MILO）慢波结构色散特性进行理论分析的基础上，结合负载限制型和渐变型MILO的特点，对X波段MILO慢波结构、阴极和中心阳极进行了设计。利用2.5维全电磁PIC程序进行粒子模拟，研究了输出功率与结构参数之间的关系，进一步优化MILO结构。在外加电压为510 kV，束流43 kA情况下，模拟得到平均功率2.83 GW的微波输出，中心频率为8.2 GHz，功率转换效率12.9%。Abstract: According to theoretical analysis of the slow-wave structure(SWS), the parameters of SWS, the cathode and the anode are chosen. A new type X-band magnetically insulated line oscillator(MILO) has been designed using the advantages of both tapered MILO and loadlimited MILO. Through numerical simulations by a 2.5-D PIC code, the impacts of several structure parameters of MILO on its output power are investigated. High power microwave is generated from the optimized MILO by simulation with the average output power of 2.83 GW, the frequency of 8.2 GHz and the efficiency of 12.9%, when the beam voltage is 510 kV and current is 43 kA．
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