The generation of azimuthal magnetic field in laser-induced plasma bubbles
The generation of azimuthal magnetic field in laser-induced plasma bubbles
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DOI：
10.1063/1.3496047
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发表时间：
2010-11
影响因子：
2.2
通讯作者：
Suyun Zhou;Wei Yu;Xiao-Hui Yuan;Han Xu;Xin Wang;G. Ma
中科院分区：
文献类型：
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作者：
Suyun Zhou;Wei Yu;Xiao-Hui Yuan;Han Xu;Xin Wang;G. Ma
考虑了方位磁场的产生，建立了激光诱导气泡的二维解析模型。结果表明，磁泡周围横向存在方位磁场，其振幅在磁泡边缘处达到峰值，在激光轴处消失。在激光韦克菲尔德加速方案中，纵向电场加速从气泡后部注入的电子，而方位磁场使由此产生的高能电子束会聚。分析模型是合理的二维粒子在细胞（PIC）模拟。
A two-dimensional (2D) analytical model for a laser-induced bubble is rebuilt by taking into account the generation of azimuthal magnetic field. It is shown that the azimuthal magnetic field surrounds the bubble transversely, whose amplitude peaks at the bubble edge and vanishes at laser axis. In a laser wakefield acceleration scheme, the longitudinal electric field accelerates the electrons injected from the rear of the bubble, while the azimuthal magnetic field makes the resulting energetic-electron beam converge. The analytical model is justified by a 2D Particle in Cell (PIC) simulation.