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Energetic electrons driven in the polarization direction of an intense laser beam incident normal to a solid target

机译：在垂直于固体靶的强激光束的偏振方向上驱动的高能电子

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Experiments were performed at the LLNL Titan laser to measure the propagation direction of the energetic electrons that were generated during the interaction of the polarized laser beam with solid targets in the case of normal incidence. The energetic electrons propagated through vacuum to spectator metal wires in the polarization direction and in the perpendicular direction, and the K shell spectra from the different wire materials were recorded as functions of the distance from the laser focal spot. It was found that the fluence of the energetic electrons driven into the spectator wires in the polarization direction compared to the perpendicular direction was larger and increased with the distance from the focal spot. This indicates that energetic electrons are preferentially driven in the direction of the intense oscillating electric field of the incident laser beam in agreement with the multiphoton inverse Bremsstrahlung absorption process. (C) 2016 Elsevier B.V. All rights reserved.
机译：在法线入射的情况下，在LLNL Titan激光器上进行了实验，以测量在极化激光束与固体靶相互作用期间产生的高能电子的传播方向。高能电子通过真空在极化方向和垂直方向传播到旁观者金属线，并且记录了来自不同线材的K壳光谱，作为距激光焦点距离的函数。发现与极化方向相比，在极化方向上被驱动进入旁观者线的高能电子的能量通量更大并且随着离焦点的距离而增加。这表明，与多光子逆Bre致辐射吸收过程相一致，高能电子优先在入射激光束的强振荡电场方向上被驱动。 （C）2016 Elsevier B.V.保留所有权利。

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