Design of a large-radius high impedance intense current diode based on gradient magnetic field
Design of a large-radius high impedance intense current diode based on gradient magnetic field
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DOI：
10.1063/5.0063680
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发表时间：
2021-09
期刊：
影响因子：
1.6
通讯作者：
Yinghao Chen;J. Ju;Yunxiao Zhou;Jun Zhang;Wei Zhang;Faning Zhang
中科院分区：
文献类型：
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作者：
Yinghao Chen;J. Ju;Yunxiao Zhou;Jun Zhang;Wei Zhang;Faning Zhang
为了减小高阻抗二极管的尺寸和磁能量消耗，设计了一种高阻抗强流二极管。通过减小阴极的中心半径和利用梯度磁场，电子束在小半径的阴极中发射，在大半径的漂移管中传输。利用粒子模拟方法分析了磁场分布对电子束传输的影响。当二极管电压为680 kV，阻抗为77 Ω，阴极半径为60 mm时，传统二极管的阳极半径为116 mm，阴阳极轴向间隙为57 mm。在相同电压和阻抗下，新型二极管的阴极半径为38 mm，阳极半径减小到80 mm，将该新型二极管进一步应用于相对论三轴速调管放大器件中，其输出功率与传统二极管相同。通过简单的定量分析，发现新型二极管的磁能量消耗小于传统二极管。综上所述，新型二极管可以在比传统二极管更小的体积内实现良好的性能。
In order to reduce the size of high impedance diodes and magnetic energy consumptions, a high impedance intense current diode is designed in this paper. By reducing the center radius of the cathode and utilizing the gradient magnetic field, the electron beam is emitted in the cathode with a small radius and transmitted in the drift tube with a large radius. The influence of magnetic field distribution on the electron beam transmission is analyzed by particle-in-cell simulation. When the diode voltage is 680 kV, the impedance is 77 Ω, and the cathode radius is 60 mm, the anode radius of the traditional diode is 116 mm and the cathode–anode axial gap is 57 mm. At the same voltage and impedance, the cathode radius of the novel diode is 38 mm, the anode radius is reduced to 80 mm, and the cathode–anode axial gap is shortened to 36 mm. Further application of the novel diode to a relativistic triaxial klystron amplifier device shows that the output power of the novel diode is the same as that of the traditional diode. Through simple quantitative analysis, it is found that the magnetic energy consumption of the novel diode is less than that of the traditional diode. To sum up, the novel diode can achieve good performances in a smaller volume than the traditional diodes.