强流同步双阴极二极管电子束模拟与诊断
Simulation and diagnosis of synchronized intense beams produced with a dual-cathode diode
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摘要: 高同步性的多电子束能够驱动产生有利于实现相位控制的多束微波，是高功率微波功率合成的关键技术。对单台加速器驱动强流同步双阴极二极管进行了模拟，在二极管阻抗约10 W，输入电压442.6 kV条件下，获得了总功率大于20 GW、总束流为47.6 kA、同步时间差小于6 ns的双电子束。开展了轰击不锈钢目击靶实验和同步双电子束诊断实验，双阴极材料为不锈钢，单个阴极长30 mm，两阴极中心间距为100 mm，阴极发射面采用天鹅绒，单阴极半径为20 mm，在阴阳极最大电压为442.8 kV时，束流峰值总和为48.78 kA，双束流同步时间差保持在4~6 ns范围内，实验结果与模拟符合较好。Abstract: Utilizing one accelerator to produce dual or multi-beam electrons has the advantages of high synchronization, high efficiency, and high power, which is the key technique for microwave power combining. The intense dual-beam was simulated with diode impedance about 10 W and input voltage of 442.6 kV. The simulation gave a total beam current of 47.6 kA, a gross power of 20 GW, and synchronization time-difference less than 6 ns. Bombarding the stainless steel witness-target and diagnosing the synchronous dual-beam were experimentally studied. The two stainless steel cathodes were 30 mm long with a radius of 20 mm and a distance of 100 mm between them, and the emitting surfaces were velvet. At diode voltage of 442.8 kV, total beam of 48.78 kA and synchronization time-difference of 4~6 ns were o
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Key words:
- high power microwave /
- dual-cathode diode /
- intense dual-beam /
- synchronous /
- pic simulation
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