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文中首先阐述了半无限长阴极杆电流对径向电子束传输的影响,通过理论分析得到了径向同轴二极管内的磁场分布及单个电子偏移幅值的解析表达式;接下来分析了有限长阴极杆电流产生的角向磁场空间分布规律,并与半无限长阴极杆电流产生的磁场强度进行了对比;最后对有限长阴极杆电流下非浸没式径向电子束的传输过程进行了研究,建立了双端馈入电流模型并对其进行了误差分析,仿真得到了阴极杆电流长度对非浸没式径向电子束传输的影响规律。
In this paper, the influence of semi-infinite cathode current on the radial electron beam propagation is first described. The magnetic field distribution and the analytical expression of single electron’s deflection amplitude in the radial coaxial diode are obtained through theoretical analysis. Next, The spatial distribution of the angular magnetic field generated by the cathode current is compared with the magnetic field generated by the semi-infinite cathode current. Finally, the transmission of the non-submerged radial electron beam under the finite cathode current is studied , A double-ended feed-in current model was established and error analysis was carried out. The influence of cathode current length on the non-submerged radial electron beam transmission was simulated.