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脉冲缩短是高功率微波器件的一个普遍现象 ,它阻碍了输出微波能量的进一步提高 ,是高功率微波研究领域中急待解决的问题 .以相对论返波管作为研究对象 ,运用粒子模拟的方法 ,研究了器件表面的爆炸发射、电子束电压和电流的脉动对输出微波性能的影响 ,从中得到了一些有益的结论 ,指出由强电场引起的慢波系统表面的爆炸发射是产生脉冲缩短的重要因素 ,电子束电流和束电压的脉动也会引起脉冲缩短 ,并提出了相应的克服方法
Pulse shortening is a common phenomenon in high power microwave devices, which hinder the further increase of output microwave energy, which is an urgent problem to be solved in the field of high power microwave research.Relying on the relativistic return wave tube as the research object, using the particle simulation method, The influence of the explosion emission, electron beam voltage and current pulsation on the performance of the output microwave is studied. Some useful conclusions are obtained. It is pointed out that the explosive emission on the surface of a slow-wave system caused by a strong electric field is an important factor for the pulse shortening , The pulsation of the electron beam current and the beam voltage will also cause the pulse to shorten and a corresponding overcoming method is proposed