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>Density effect on proton acceleration from carbon-containing high-density thin foils irradiated by high-intensity laser pulses
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Density effect on proton acceleration from carbon-containing high-density thin foils irradiated by high-intensity laser pulses
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/cm~3 and of an ultrahigh intensity (2 X 10~(20) W/cm~2) 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.
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机译：使用二维混合粒子在细胞内的方案，模拟了超高强度激光脉冲辐照的致密塑料箔中质子的加速度。对于密度为ρ= 0.2、1和3 g / cm〜3的超密箔片以及超高强度（2 X 10〜（20）W / cm〜2）激光脉冲的选定参数，我们的仿真表明高密度目标有利于目标法向鞘层加速质子的高度准直，但在短加速时间内（<100 fs）能量较少。特别是，在薄的固体靶材的前表面和后表面都清楚地观察到了不同等离子体密度下碳离子强烈局部加热的差异，这表明靶材的密度和成分的影响对于正确模拟也很重要。超强激光-固体相互作用中的高能离子产生。
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