High-energy collimated electron acceleration from ultra-intense laser interaction with tube targets
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摘要: 利用二维PIC粒子模拟程序研究了超短超强激光脉冲与柱腔靶相互作用产生的表面超热电子加速现象。采用光强为1021 W/cm2量级的超高斯激光脉冲掠入射进入柱腔靶,在靶的内壁上观察到了GeV量级的表面超热电子。超热电子束被准静态的电场和磁场约束在内壁表面附近,保证了电子束的准直性,发散角仅为1.6;并且由于超热电子束在纵向激光电场中加速了mm级的距离,激光到高能电子(100 MeV)的转换效率达到了26.6%。另外,通过多参数模拟和理论解析讨论了激光的光强以及横向空间分布对这种表面超热电子加速的影响。Abstract: Two-dimensional PIC (particle-in-cell) simulation is used to investigate the interaction between ultra-intense short-pulse lasers with tube targets. When an ultra-intense super-Gaussian laser pulse propagates at a grazing incidence angle into the tube target, GeV-class electron acceleration is observed on the inner surface. Fast electrons are confined along the surface by quasistatic electric and magnetic fields, resulting in a small divergence angle of the generated electron beam. These surface fast electrons can be accelerated for a long distance along the tube; as a result, the energy conversion efficiency is very high. The influence of the laser intensity and the transverse profile on the surface electron acceleration process is also discussed in the article.
期刊类型引用(3)
1. 王子涛,周维民,邓志刚,宋尧祥. 填充预等离子体通道靶激光电子加速研究. 强激光与粒子束. 2022(11): 37-42 . 本站查看
2. 杨鸣,易涛,杨进文,王传珂,李廷帅,刘慎业,江少恩,丁永坤. 强激光辐照平面靶与柱腔靶产生电磁脉冲对比研究. 中国激光. 2016(08): 81-88 . 百度学术
3. 闫永宏,吴玉迟,董克攻,于明海,谷渝秋. 激光固体靶相互作用产生正电子的模拟研究. 强激光与粒子束. 2015(11): 106-111 . 本站查看
其他类型引用(1)
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