物理
等离子体
原子物理学
质子
等离子体加速
离子
氢
准直光
加速度
激光器
横截面
图层(电子)
光学
核物理学
材料科学
纳米技术
经典力学
工程类
结构工程
量子力学
作者
Lingen Huang,Anle Lei,Jianhui Bin,Yu Bai,Wei Yu,M. Y. Yu,T. E. Cowan
摘要
Energetic proton acceleration from interaction of intense short circularly polarized laser pulse with a sandwich target is investigated using two-dimensional particle-in-cell simulation. The sandwich target consists of a hydrogen-plasma layer surrounded by carbon-plasma layers. It is found that the transverse electric fields generated at the plasma layer interfaces efficiently confine the longitudinally accelerated protons to within the hydrogen-plasma layer such that they are collimated and have smaller energy spread compared with a pure proton layer target. The proton energy spectrum can be controlled by adjusting the target parameters, in particular the width of the hydrogen-plasma layer and the density of the carbon-plasma layer.
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