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首页> 外文期刊>Physics of plasmas >High contrast ion acceleration at intensities exceeding 10 21 W cm - 2
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High contrast ion acceleration at intensities exceeding 10 21 W cm - 2

机译：强度超过10 21 W cm-2的高对比度离子加速

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摘要

Ion acceleration from short pulse laser interactions at intensities of 2 × 10 21 Wcm - 2 was studied experimentally under a wide variety of parameters, including laser contrast, incidence angle, and target thickness. Trends in maximum proton energy were observed, as well as evidence of improvement in the acceleration gradients by using dual plasma mirrors over traditional pulse cleaning techniques. Extremely high efficiency acceleration gradients were produced, accelerating both the contaminant layer and high charge state ions from the bulk of the target. Two dimensional particle-in-cell simulations enabled the study of the influence of scale length on submicron targets, where hydrodynamic expansion affects the rear surface as well as the front. Experimental evidence of larger electric fields for sharp density plasmas is observed in simulation results as well for such targets, where target ions are accelerated without the need for contaminant removal.
机译：在各种参数（包括激光对比度，入射角和目标厚度）下，通过实验研究了强度为2×10 21 Wcm-2的短脉冲激光相互作用的离子加速。观察到最大质子能量的趋势，以及通过使用双等离子体镜比传统脉冲清洗技术改善加速度梯度的证据。产生了极高效率的加速梯度，加速了来自靶标主体的污染物层和高电荷态离子。二维的单元格内粒子模拟能够研究水垢长度对亚微米目标的影响，其中流体动力膨胀会影响后表面和前表面。在仿真结果以及此类目标中也观察到了尖锐密度等离子体具有较大电场的实验证据，在这些目标中，无需去除污染物即可加速目标离子。

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