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通过粒子模拟和实验研究相结合的方法,研究了磁绝缘线振荡器的阴极烧蚀与输入电压波形的关系,找到了造成阴极烧蚀的根本原因,给出了电子束回轰阴极的清晰图像,并通过对低阻抗加速器平台输出电压波形的调整,抑制了反向电压,解决了器件的阴极烧蚀问题.研究结果表明:在正向电压作用下已经发射出来的电子束在超过一定幅度的反向电压作用下发生反向运动并回轰阴极,产生反向电流并造成器件阴极的烧蚀,因此注入电压下降沿之后的反向电压是引起磁绝缘线振荡器的阴极烧蚀的最根本因素.
Through the combination of particle simulation and experimental research, the relationship between the cathode ablation and the input voltage waveform of a magnetically insulated wire oscillator was studied. The root cause of cathodic ablation was found, and a clear image of the electron beam back to the cathode was obtained , And through the adjustment of the output voltage waveform of the low-impedance accelerator platform, the reverse voltage is suppressed and the cathode ablation problem of the device is solved. The results show that the electron beam emitted under the forward voltage is more than a certain amplitude Reverse voltage and reverse the role of the back to the cathode, resulting in reverse current and cause the device cathode ablation, so the injection voltage falling edge of the reverse voltage is caused by the cathode of the magnetic insulated wire oscillator ablation the most fundamental factor.