Wakefield Resonant Excitation by Intense Laser Pulse in Capillary Plasma
Wakefield Resonant Excitation by Intense Laser Pulse in Capillary Plasma
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DOI：
10.1088/1009-0630/14/1/01
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发表时间：
2012
影响因子：
1.7
通讯作者：
Zhou Suyun;Yuan Xiao;Mingping Liu
中科院分区：
文献类型：
--
作者：
Zhou Suyun;Yuan Xiao;Mingping Liu
基于简单的二维解析模型，研究了激光诱导等离子体在毛细管中的尾流场。结果表明，在一定的等离子体密度下，选择合适的激光脉冲宽度和毛细管半径，经毛细管壁重塑的强激光脉冲在毛细管等离子体中传播时，会共振激发出较强的尾流场。考虑了共振条件下激光宽度和毛细半径对等离子体密度的依赖关系。毛细管等离子体中气泡的尾流场振幅和纵向尺度远大于无界等离子体，因此毛细管引导的等离子体尾流场更有利于电子加速。
The laser-induced plasma wakefield in a capillary is investigated on the basis of a simple two-dimensional analytical model. It is shown that as an intense laser pulse reshaped by the capillary wall propagates in capillary plasma, it resonantly excites a strong wakefield if a suitable laser pulse width and capillary radius are chosen for a certain plasma density. The dependence of the laser width and capillary radius on the plasma density for resonance conditions is considered. The wakefield amplitude and longitudinal scale of bubbles in capillary plasma are much larger than those in unbounded plasma, so the capillary guided plasma wakefield is more favorable to electron acceleration.