Temporal and spatial expansion of a multi-dimensional model for electron acceleration in the bubble regime
Temporal and spatial expansion of a multi-dimensional model for electron acceleration in the bubble regime
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DOI：
10.1017/s0263034614000111
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发表时间：
2013-04
影响因子：
0.9
通讯作者：
Johannes Thomas;A. Pukhov
中科院分区：
文献类型：
--
作者：
Johannes Thomas;A. Pukhov
本文导出了一个扩展的等离子体尾流场（气泡或吹出区）中粒子动力学的解析模型。最近提出的分段模型（Kostyukov等人，新物理学杂志，{\bf 12}，045009（2010））被推广为包括时间依赖的气泡半径和加速方向上的全场解。在模型中加入空腔动力学是正确模拟粒子捕获所必需的。另一方面，它表明，以前报道的分段模型不再现形成的单能量峰的粒子光谱。只有当模型中包含了完整的纵向场梯度时，才能恢复单能电子束。
An extended analytical model for particle dynamics in fields of a highly-nonlinear plasma wake field (the bubble or blow out regime) is derived. A recently proposed piecewise model (Kostyukov et al., New J. Phys., {\bf 12}, 045009 (2010)) is generalized to include a time dependent bubble radius and full field solution in the acceleration direction. Incorporation of the cavity dynamics in the model is required to simulate the particle trapping properly. On the other hand, it is shown that the previously reported piecewise model does not reproduce the formation of a mono energetic peak in the particle spectrum. The mono energetic electron beams are recovered only when the full longitudinal field gradient is included in the model.