Laser ion-acceleration scaling laws seen in multiparametric particle-in-cell simulations
Laser ion-acceleration scaling laws seen in multiparametric particle-in-cell simulations
复制标题
DOI：
10.1103/physrevlett.96.105001
复制
发表时间：
2006-03-17
影响因子：
8.6
通讯作者：
Tajima, T
中科院分区：
文献类型：
--
作者：
Esirkepov, T;Yamagiwa, M;Tajima, T
用多参数粒子模拟方法研究了双层靶上强度为I=10（20）-10（22）W/cm（2）×（μ m/lambda）（2）的激光脉冲对离子的加速。对于具有宽范围的厚度l和密度n（e）的靶，在给定强度下，最高离子能量增益发生在靶的特定电子面密度σ =n（e）l处，其与强度的平方根成比例。在薄靶和最佳激光脉冲持续时间的情况下，离子最大能量与激光脉冲功率的平方根成比例。当激光场的辐射压力成为主导时，离子最大能量变得与激光脉冲能量成比例。
The ion acceleration driven by a laser pulse at intensity I=10(20)-10(22) W/cm(2)x(mu m/lambda)(2) from a double layer target is investigated with multiparametric particle-in-cell simulations. For targets with a wide range of thickness l and density n(e), at a given intensity, the highest ion energy gain occurs at certain electron areal density of the target sigma=n(e)l, which is proportional to the square root of intensity. In the case of thin targets and optimal laser pulse duration, the ion maximum energy scales as the square root of the laser pulse power. When the radiation pressure of the laser field becomes dominant, the ion maximum energy becomes proportional to the laser pulse energy.