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Spectral control in proton acceleration with multiple laser pulses

机译:多激光脉冲质子加速中的光谱控制

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We address the question of whether multiple high intensity (> 10(18) W cm(-2)) laser pulses ( each O( 100 fs)) can produce proton beams with a modified energy spectrum on irradiating a foil target. This has been studied in one dimension with both Vlasov and particle-in-cell codes. A reduction in the maximum proton energy, and the generation of spectral peaks, is observed. This is the first theoretical demonstration of spectral peak generation by purely optical means. The mechanism, which has been termed multiple pulse sheath acceleration, that produces these spectral peaks is described, and the same mechanism occurs in both sets of simulations.
机译:我们解决了以下问题:多个高强度(> 10(18)W cm(-2))激光脉冲(每个O(100 fs))是否可以在辐照箔靶时产生具有改良能谱的质子束。已使用Vlasov和单元格内粒子代码对一维进行了研究。观察到最大质子能量的减少以及谱峰的产生。这是通过纯光学手段产生光谱峰的第一个理论证明。描述了产生这些频谱峰值的机制(称为多脉冲鞘加速度),并且在两组模拟中都发生了相同的机制。

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