Three-dimensional simulations of ion acceleration from a foil irradiated by a short-pulse laser
Three-dimensional simulations of ion acceleration from a foil irradiated by a short-pulse laser
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DOI：
10.1103/physrevlett.86.3562
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发表时间：
2001-04-16
影响因子：
8.6
通讯作者：
Pukhov, A
中科院分区：
文献类型：
--
作者：
Pukhov, A
利用三维粒子模拟方法研究了10（19）W/cm（2）激光脉冲辐照下金属箔的离子加速过程。在前端，激光有质动力向内推动电子，从而通过电荷分离产生电场，从而拖动离子。在箔的背面，离子被出射到真空中的热电子的空间电荷加速，如Hatchett等人所建议的。[Phys.Plasmas 7，2076（2000）]。自生磁场对超热电子在过密等离子体中的输运和出射都有很强的影响。快速离子从后表面以类似于Clark等人所检测到的锥形出现。[Phys. Rev. Lett. 84，670（2000）]。
Using 3D particle-in-cell simulations we study ion acceleration from a foil irradiated by a laser pulse at 10(19) W/cm(2) intensity. At the front side, the laser ponderomotive force pushes electrons inwards, thus creating the electric field by charge separation, which drags the ions. Ar the back side of the foil, the ions are accelerated by space charge of the hot electrons exiting into vacuum, as suggested by Hatchett et at. [Phys. Plasmas 7, 2076 (2000)]. The transport of hot electrons through the overdense plasma and their exit into vacuum are strongly affected by self-generated magnetic fields. The fast ions emerge from the rear surface in cones similar to those detected by Clark et at. [Phys. Rev. Lett. 84, 670 (2000)].