介绍了利用串级二极管产生大面积脉冲硬X射线的基本原理,建立了串级二极管的等效电路模型,分析了二极管串联工作过程,通过模拟计算给出了串级二极管工作过程的影响因素。串级二极管分压过程分为电容分压、阻抗和容抗分压、真空击穿后动态平衡及阻抗分压四个阶段,二极管电容和真空击穿电压是影响二极管串联初始阶段分压的主要因素,二极管的阻抗变化过程和二极管间隙的击穿时间差决定二极管分压的一致性。

Operating principle of series diode is introduced and an equivalent circuit of series diode is built to analyze its working process. Circuit simulation is done to find the influencing factors of series diode working process. Voltage dividing of series diode includes four phases: first, voltages of each diode are divided according to capacitances of each diode. Second, voltages of each diode are divided according to the first diode impendence and second gap capacitance. Third, Voltage dividing enters into a dynamic balancing phase relating to all the parameters after both cathodes emitting electrons. Finally, Voltage dividing is determined by the impendence of each diode. Capacitances and vacuum breakdown voltages of diodes are the major influencing factors of voltage dividing in the primary stage, and impedance variation and vacuum breakdown time of each gap have important impact on voltage dividing in the dynamic balancing phase.