论文部分内容阅读
为了获得具有快速上升、下降沿的高频纳秒脉冲,对传统雪崩单管电路的改进电路进行了试验,验证了改进电路能加快充电速度的可行性。设计了两种10级Marx型纳秒级正脉冲发生器,发生器采用磁环隔离的驱动方案,主电路拓扑结构中采用二极管代替传统Marx电路中的所有电阻。在100Ω的阻性负载下进行放电实验,最终重频工作状态下输出峰值上千伏的纳秒脉冲,输出端负载加截尾开关后脉冲的下降沿缩短至3 ns。实验结果表明,改进后的发生器有更高的输出幅值和工作频率,磁环隔离的驱动方案确保了每级雪崩管同时触发导通并且产生具有纳秒上升沿的快脉冲,二极管替代传统Marx电路的所有电阻加快了电容的充电速度、提升了脉冲发生器的工作效率,负载并联截尾开关后脉冲后沿更快,实验结果良好。
In order to obtain high-frequency nanosecond pulses with fast rising and falling edges, the improved circuit of a conventional avalanche single-tube circuit was tested, and the feasibility of improving the charging speed of the circuit was verified. Two kinds of 10-stage Marx-type nanosecond positive pulse generators are designed. The generator is driven by magnetic isolation. The main circuit topology uses diodes instead of all the resistors in the traditional Marx circuit. The discharge test was carried out under a resistive load of 100Ω, and finally the nanosecond pulse peaked at a kilovoltage was output under the repetitive frequency working condition. The falling edge of the pulse shortened to 3 ns after the output load plus a truncated switch. Experimental results show that the improved generator has a higher output amplitude and operating frequency. The magnetic isolation scheme ensures that each avalanche trigger simultaneously turns on and generates a fast pulse with a nanosecond rising edge. The diode replaces the traditional All the resistance of Marx circuit accelerates the charging speed of the capacitor, improves the working efficiency of the pulse generator, and the pulse trailing edge after the parallel load is connected in parallel is faster, and the experimental result is good.