Density effect on proton acceleration from carbon-containing high-density thin foils irradiated by high-intensity laser pulses
Density effect on proton acceleration from carbon-containing high-density thin foils irradiated by high-intensity laser pulses
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DOI：
10.1063/1.2730565
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发表时间：
2007-05
影响因子：
3.2
通讯作者：
C. Zhou;M. Yu;Xiantu He
中科院分区：
文献类型：
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作者：
C. Zhou;M. Yu;Xiantu He
采用二维混合粒子网格方法模拟了高强度激光脉冲辐照下质子在致密塑料薄膜中的加速过程。对于密度ρ=0.2，1和3 g scincm ~ 3的过密箔和2×1020 W scincm ~ 2激光脉冲的选定参数，我们的模拟表明，高密度靶有利于靶-正鞘加速质子的高准直，但在短加速时间（<100 fs）内能量较少。特别是，不同的等离子体密度的碳离子的强局部加热的差异，清楚地观察到在薄的固体靶的前表面和后表面，这表明目标的密度和成分的效果也是重要的正确模拟高能离子产生在超强激光-固体相互作用。
The acceleration of protons in dense plastic foils irradiated by ultrahigh intensity laser pulses is simulated using a two-dimensional hybrid particle-in-cell scheme. For the chosen parameters of the overdense foils of densities ρ=0.2, 1, and 3 g∕cm3 and of an ultrahigh intensity (2×1020 W∕cm2) laser pulse, our simulations illustrate that a high-density target is favorable to high collimation of the target-normal-sheath acceleration protons but less energy for a short acceleration time (<100 fs). In particular, the difference of strong local heating of the carbon ion for different plasma densities is clearly observed at both the front and rear surfaces of thin solid targets, suggesting that the effect of the density and composition of the targets are also important for correctly simulating energetic ion generation in ultraintense laser-solid interactions.