论文标题
在外部尾矿下的平衡粒子梁的演变
Evolution of equilibrium particle beams under external wakefields
论文作者
论文摘要
等离子体中的超层析电荷颗粒的光束可以用自己的径向尾菲尔德达到平衡，然后在形状变化的情况下传播。如果某些共同移动的扰动出现在光束前面，它可能会或可能不会用韦克菲尔德摧毁光束，具体取决于韦克菲尔德的相位和振幅。我们从数值上研究哪些扰动可以在轴测构型中以等离子体韦克菲尔德加速度感兴趣的参数销毁一个短束或许多短束的火车，以及多快的速度。我们发现有特别危险的韦克菲尔德阶段，可以通过非常低振幅的扰动来破坏光束。我们还发现，振幅比火车中一堆的韦克菲尔德大的扰动总是具有破坏性的。
A beam of ultrarelativistic charged particles in a plasma can reach equilibrium with its own radial wakefield and then propagate with little change in shape. If some co-moving perturbation appears ahead of the beam, it may or may not destroy the beam with its wakefield, depending on the phase and amplitude of the wakefield. We numerically study which perturbations can destroy a single short bunch or a train of many short bunches at the parameters of interest for plasma wakefield acceleration in an axysimmetric configuration, and how fast. We find that there are particularly dangerous wakefield phases in which the beam can be destroyed by perturbations of very low amplitude. We also find that perturbations with an amplitude larger than the wakefield of a single bunch in the train are always destructive.
