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全腔输出半透明阴极相对论磁控管的结构改进和性能提升

杨温渊 董烨 孙会芳 董志伟

杨温渊, 董烨, 孙会芳, 等. 全腔输出半透明阴极相对论磁控管的结构改进和性能提升[J]. 强激光与粒子束, 2021, 33: 073001. doi: 10.11884/HPLPB202133.210098
引用本文: 杨温渊, 董烨, 孙会芳, 等. 全腔输出半透明阴极相对论磁控管的结构改进和性能提升[J]. 强激光与粒子束, 2021, 33: 073001. doi: 10.11884/HPLPB202133.210098
Yang Wenyuan, Dong Ye, Sun Huifang, et al. Structure optimization and performance improvements of relativistic magnetron using all-cavity output and semi-transparent cathode[J]. High Power Laser and Particle Beams, 2021, 33: 073001. doi: 10.11884/HPLPB202133.210098
Citation: Yang Wenyuan, Dong Ye, Sun Huifang, et al. Structure optimization and performance improvements of relativistic magnetron using all-cavity output and semi-transparent cathode[J]. High Power Laser and Particle Beams, 2021, 33: 073001. doi: 10.11884/HPLPB202133.210098

全腔输出半透明阴极相对论磁控管的结构改进和性能提升

doi: 10.11884/HPLPB202133.210098
基金项目: 国家自然科学基金项目(11875094)
详细信息
    作者简介:

    杨温渊(1973—),女,博士,研究员,主要从事高功率微波技术和等离子体物理研究

  • 中图分类号: TN128

Structure optimization and performance improvements of relativistic magnetron using all-cavity output and semi-transparent cathode

  • 摘要: 对全腔输出半透明阴极相对论磁控管做了进一步的改进,并对其进行了物理分析和三维全电磁粒子模拟研究。通过半透明阴极结构的改进,即改变阴极角向方位和阴极发射面高度参差设计以及局部参数优化,使得在较宽的工作参数范围内,器件起振初期可能出现的模式竞争得到抑制,起振时间进一步缩短,同时输出效率得到较大提高。在注入电子束电压和电流分别约为518 kV和4.1 kA、外加磁场为0.575 T时,模拟在S波段获得了效率大于66%、功率约1.42 GW的微波输出。同时还给出了电子束电压和外加磁场等参数在一定范围内变化时对输出性能的影响规律。研究结果可应用于高效紧凑型相对论磁控管的实验研究。
  • 图  1  AS相对论磁控管示意图

    Figure  1.  Schematic drawings of the AS relativistic magnetron

    图  2  半透明阴极角向旋转前后的示意图

    Figure  2.  Schematic drawings of the semi-transparent cathode with different orientation

    图  3  耦合孔尺寸较大时,电子的空间分布图,初始时刻t=6.026 ns

    Figure  3.  Phase space plots of electrons with relatively large coupling holes

    图  4  耦合孔尺寸较大时,输出功率随时间的变化曲线

    Figure  4.  Time plot of the instantaneous output power with relatively large coupling holes

    图  5  耦合孔尺寸过大时,电子的空间分布图,饱和时t=20.374 ns

    Figure  5.  Phase space plots of electrons with larger coupling holes at saturation

    图  6  耦合孔尺寸过大时,输出功率随时间的变化曲线

    Figure  6.  Time plot of the instantaneous output power with larger coupling holes

    图  7  半透明阴极不同叶片半径即发射面高度参差变化后x-y截面示意图

    Figure  7.  Schematic drawings of the semi-transparent cathode with vane radii vary alternately

    图  8  耦合孔尺寸较大,阴极发射面输出功率随时间的变化曲线

    Figure  8.  Time plot of the instantaneous output power with relatively large coupling holes

    图  9  耦合孔尺寸过大,阴极发射面输出功率随时间的变化曲线

    Figure  9.  Time plot of the instantaneous output power with larger coupling holes

    图  10  注入电压和功率平均值随时间的变化

    Figure  10.  Time plots of the averaged beam voltage and total input power obtained on the diode

    图  11  阳极腔间隙角向电场随时间的变化曲线及相应的FFT变换图

    Figure  11.  Variations of Eθ with time at the anode cavity gap and the corresponding Fourier transform

    图  12  输出瞬时功率和周期平均功率随时间的变化曲线

    Figure  12.  Time plots of the instantaneous and periodic-average output power.

    图  13  外加磁场固定时输出功率和效率随电压的变化曲线

    Figure  13.  Variation of the output power and efficiency versus the beam voltage with fixed applied magnetic field

    图  14  输出功率和效率随外加磁场的变化曲线

    Figure  14.  Variation of the output power and efficiency versus the guiding magnetic field

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出版历程
  • 收稿日期:  2021-03-20
  • 修回日期:  2021-05-11
  • 网络出版日期:  2021-05-25
  • 刊出日期:  2021-07-15

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