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首页> 外文期刊>Physics of plasmas >Dominant front-side acceleration of energetic proton beams from plastic targets irradiated by an ultraintense laser pulse
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Dominant front-side acceleration of energetic proton beams from plastic targets irradiated by an ultraintense laser pulse

机译：来自超强激光脉冲辐照的塑料靶的高能质子束的显着正面加速

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摘要

An experimental observation has been made by using aluminum-coated Mylar foils, which strongly supports that in the case of plastic target, the energetic part of the proton beam originates from the front-side of the target. When a 30 fs laser pulse with an intensity of 1.6× 1019 W/ cm2 was irradiated on the 12.5-μm -thick Mylar side of the aluminum-coated Mylar foil, the maximum proton energy was reduced by a factor 5.5 as compared to that of 3.3 MeV observed from the single layer of the Mylar foil. With the help of a two-dimensional particle-in-cell simulation, these observations can be interpreted that in the case of plastic target, the energetic proton beam originates from the front-side of the target. In the case of an aluminum-coated 6-μm -thick Mylar foil, more energetic proton beams of 4.7 MeV were also observed when the laser pulse was irradiated on the aluminum side as compared to those of 3.4 MeV from the single Mylar foil.
机译：通过使用镀铝的聚酯薄膜箔进行了实验观察，该箔膜强烈支持在使用塑料靶的情况下，质子束的高能部分源自靶的正面。当在涂铝的聚酯薄膜箔的12.5μm厚的聚酯薄膜侧上照射强度为1.6×1019 W / cm2的30 fs激光脉冲时，与之相比，最大质子能量降低了5.5倍。从聚酯薄膜的单层观察到的3.3 MeV。借助二维单元格内粒子模拟，可以将这些观察结果解释为，在塑料目标的情况下，高能质子束源自目标的正面。在铝涂层的6μm厚的聚酯薄膜箔中，当从铝侧照射激光脉冲时，与单个聚酯薄膜的3.4 MeV相比，还观察到了更高的4.7 MeV的高能质子束。

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