多参数PIC模拟中的Laser离子加速标度律
Laser Ion Acceleration Scaling Laws Seen in Muti-Parametric PIC Simulations
摘要：
采用多参数粒子模拟方法研究了强度为$I = 10^{20} - 10^{22} $ W/cm $^2\times(μ$ m $/λ)^2$的激光脉冲对双层靶离子的加速作用。对于具有宽范围的厚度$l$和密度$n_e$的靶，在给定强度下，最高离子能量增益出现在靶$σ= n_e l$的某个{ \it临界深度}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。
英文摘要：
The ion acceleration driven by a laser pulse at intensity $I = 10^{20} - 10^{22} $W/cm$^2\times(μ$m$/λ)^2$ from a double layer target is investigated with multi-parametric Particle-in-Cell (PIC) simulations. For targets with a wide range of thickness $l$ and density $n_e$, at given intensity the highest ion energy gain occurs at certain {\it critical depth} of the target $σ= n_e l$, 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.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
