Collisional particle-in-cell modelling of the generation and control of relativistic electron beams produced by ultra-intense laser pulses
Collisional particle-in-cell modelling of the generation and control of relativistic electron beams produced by ultra-intense laser pulses
复制标题
DOI：
10.1088/0741-3335/54/8/085016
复制
发表时间：
2012-08
影响因子：
2.2
通讯作者：
H. Schmitz;R. Lloyd;R. Evans
中科院分区：
文献类型：
--
作者：
H. Schmitz;R. Lloyd;R. Evans
采用二维全动力学碰撞粒子模拟方法研究了超强激光与固体密度靶相互作用。我们发现，电子的角扩展主要是由于弯曲的几何形状的电子加速区。电子散射磁场所造成的韦伯式的不稳定性起着较小的作用。的角度扩展可以抵消结构的目标到不同的电阻率的区域，我们提出了一种新的椭圆形的几何形状的高Z核心，它可以保持更大的距离后的目标相比，圆柱形的几何形状的电子准直。
We present two-dimensional fully kinetic collisional particle-in-cell (PIC) simulations of the interaction of an ultra-intense laser with a solid density target. We find that the angular spread of the electrons is mostly due to the curved geometry of the electron acceleration region. Electron scattering off the magnetic fields caused by Weibel-like instabilities plays a smaller role. The angular spread can be counteracted by structuring the target into regions of different resistivity and we present a novel elliptical geometry of the high-Z core which can keep the electrons collimated for larger distances behind the target compared with cylindrical geometry.