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Novel Fast Simulation Technique for Axisymmetric Plasma Wakefield Acceleration Configurations in the Blowout Regime

机译:井喷条件下轴对称等离子体韦克菲尔德加速结构的新型快速仿真技术

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In the blowout regime of plasma wakefield acceleration (PWFA), which is the most relevant configuration for current and future applications and experiments, the plasma flow that is excited by the ultra-relativistic drive beam is highly nonlinear. Thus, fast and accurate simulation codes are indispensable tools in the study of this extremely important problem. We have developed a novel algorithm that deals with the propagation of axisymmetric bunches of otherwise arbitrary profile through a cold plasma of uniform density. In contrast to the existing PWFA simulation tools, our code PLasma-Electron Beam Simulations (PLEBS) uses a new computational scheme which ensures that the transverse and longitudinal directions are completely decoupled-a feature which significantly enhances the speed and robustness of the new method. Our numerical results are benchmarked against the QuickPIC code [14] and excellent agreement is established between the two approaches.
机译:在等离子流场加速(PWFA)的井喷状态下,这是当前和将来的应用和实验中最相关的配置,由超相对论驱动束激发的等离子流是高度非线性的。因此,快速而准确的仿真代码是研究这个极其重要的问题必不可少的工具。我们已经开发了一种新颖的算法,可以处理均匀分布的冷等离子体通过任意密度分布的轴对称束的传播。与现有的PWFA仿真工具相比,我们的代码PLasma-电子束仿真(PLEBS)使用一种新的计算方案,可以确保横向和纵向方向完全解耦,这一功能大大提高了新方法的速度和鲁棒性。我们的数值结果以QuickPIC代码[14]为基准,并且两种方法之间建立了良好的一致性。

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