Nonlinear theory for beam-wave interactions of two electron beams with higher order TE20mode in serpentine waveguide traveling wave amplifier
Nonlinear theory for beam-wave interactions of two electron beams with higher order TE20mode in serpentine waveguide traveling wave amplifier
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DOI：
10.1063/1.5030593
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发表时间：
2018-12
影响因子：
2.2
通讯作者：
Wenxin Liu;Ke Li;Peng Gao;Chao Zhao;Xin Guo;Zhaochuan Zhang
中科院分区：
文献类型：
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作者：
Wenxin Liu;Ke Li;Peng Gao;Chao Zhao;Xin Guo;Zhaochuan Zhang
在这项研究中，提出了一个非线性模型，用于分析蛇形波导（SW）行波管（TWT）中具有较高TE20模式的两束电子束的束波相互作用。利用新模型，扩大了SW的尺寸，降低了SW的制造难度。为了研究两束电子束在SW中与高阶模式相互作用的特性，采用圆盘理论，结合间隙中的射频场、空间电荷场和电子运动方程，并考虑两束电子束对波的反应。研究了功率饱和的非线性特性、电子速度的分布和相空间。为了验证非线性模型的有效性，将理论结果与细胞内粒子模拟结果进行了比较，并研究了输出功率随束流电压和激发频率的变化。结果表明，相对误差小于10%，适合求解SW-TWT运行特性。本文提出了一种非线性模型，用于分析蛇形波导（SW）行波管（TWT）中两束具有较高TE20模式的电子束的束波相互作用。利用新模型，扩大了SW的尺寸，降低了SW的制造难度。为了研究两束电子束在SW中与高阶模式相互作用的特性，采用圆盘理论，结合间隙中的射频场、空间电荷场和电子运动方程，并考虑两束电子束对波的反应。研究了功率饱和的非线性特性、电子速度的分布和相空间。为了验证非线性模型的有效性，将理论结果与细胞内粒子模拟结果进行了比较，并研究了输出功率随束流电压和激发频率的变化。结果表明，相对误差小于10%，适合...
In this study, a nonlinear model is presented, which is used to analyze the beam-wave interaction of two electron beams with a higher TE20 mode in a serpentine waveguide (SW) traveling wave tube (TWT). Taking advantage of the novel model, the dimensions of SW are enlarged and the difficulties of fabrications of SW are reduced. To investigate the characteristics of two electron beams interacting with a high order mode in SW, the disk theory is used, in which the RF field in gap, space charge field, and the electron motion equations are combined, and the reactions of two electron beams to wave are considered. The nonlinear characteristics of power saturations, the distributions of electron velocity, and phase space are studied. To verify the validity of the nonlinear model, the theoretical results are compared with those of particle-in-cell simulations, and the output powers versus beam voltage and exciting frequency are studied. The results show that the relative errors are less than 10%, which are suitable for solving the SW-TWT operation characteristics.In this study, a nonlinear model is presented, which is used to analyze the beam-wave interaction of two electron beams with a higher TE20 mode in a serpentine waveguide (SW) traveling wave tube (TWT). Taking advantage of the novel model, the dimensions of SW are enlarged and the difficulties of fabrications of SW are reduced. To investigate the characteristics of two electron beams interacting with a high order mode in SW, the disk theory is used, in which the RF field in gap, space charge field, and the electron motion equations are combined, and the reactions of two electron beams to wave are considered. The nonlinear characteristics of power saturations, the distributions of electron velocity, and phase space are studied. To verify the validity of the nonlinear model, the theoretical results are compared with those of particle-in-cell simulations, and the output powers versus beam voltage and exciting frequency are studied. The results show that the relative errors are less than 10%, which are suitabl...