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在粒子束引导的等离子尾波场加速机制中,为了加速电子获得最大能量,大量研究集中于改变单束牵引粒子束的线度、形状、电荷性质等参数.综合考虑已有的实验结果,本文提出了一种相比于单束电子牵引更为有效的加速方式,利用双束平行电子束来加速自注入的电子.通过2.5维粒子程序模拟,发现在牵引电子束具有相同能量、电量、尺寸的条件下,通过双束平行电子束加速得到的电子具有长程加速、高能和准单能性的特性.同时在空泡内形成了一束独特的回流电子,进一步使得自注入电子具有更好的准直性.
In the particle beam-guided plasma wakefield acceleration mechanism, in order to accelerate the electron to obtain the maximum energy, a large number of studies have focused on changing the parameters such as the linearity, shape and charge properties of a single beam towing particle beam.Considering the existing experimental results, A more efficient acceleration mode than single-beam electric traction is proposed, in which two-beam parallel electron beams are used to accelerate the self-injected electrons. By 2.5-D particle program simulation, it is found that when the towed electron beams have the same energy, , The electrons accelerated by the two-beam parallel electron beam have the characteristics of long-range acceleration, high energy and quasi-monoenergetics, and form a unique bunch of backflow electrons in the cavity at the same time, which further makes the self-injected electrons have better Collimation.