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Numerical study of laser energy effects on density transition injection in laser wakefield acceleration

机译:激光能量效应对激光韦克菲尔德加速下密度过渡注射的数值研究

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摘要

Density transition (or shock-front) injection is a technique to obtain high quality electron beams in laser wakefield acceleration. This technique, which requires no additional laser pulse, is easy to implement and is receiving increasing interest. In addition to its performances, its setup realized with a blade inserted in a gas jet allows a certain flexibility in controlling the density transition shape, whose effects on the beam quality have been studied theoretically and experimentally. We report the results of particle-in-cell simulations where the laser energy is systematically varied for different shapes of the density transition. Our study shows how the laser energy affects the injection process, increasing the injected charge and influencing the other beam characteristics (e.g. energy and duration).
机译:密度过渡(或冲击前)注射是在激光韦克野束中获得高质量电子束的技术。 该技术不需要额外的激光脉冲,易于实现并且正在接收越来越兴趣。 除了其性能之外,它的设置与插入气射流中的刀片实现允许一定的灵活性控制密度过渡形状,其理论上和实验已经研究了对光束质量的影响。 我们报告了粒子内模拟的结果,其中激光能量为密度过渡的不同形状而系统地变化。 我们的研究表明激光能量如何影响喷射过程,增加注入的电荷并影响其他光束特性(例如能量和持续时间)。

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