We present a study of laser-driven ion acceleration with micrometre and sub-micrometre thick targets, which focuses on the enhancement of the maximum proton energy and the total number of accelerated particles at the PHELIX facility. Using laser pulses with a nanosecond temporal contrast of up to $10^{-12}$ and an intensity of the order of $10^{20}~\text{W}/\text{cm}^{2}$ , proton energies up to 93 MeV are achieved. Additionally, the conversion efficiency at $45^{\circ }$ incidence angle was increased when changing the laser polarization to p, enabling similar proton energies and particle numbers as in the case of normal incidence and s-polarization, but reducing the debris on the last focusing optic.

中文翻译：

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PHELIX 激光驱动质子源的增强

我们提出了一项对微米和亚微米厚靶材的激光驱动离子加速的研究，重点是提高 PHELIX 设施的最大质子能量和加速粒子的总数。使用具有高达纳秒时间对比度的激光脉冲 $10^{-12}$ 和强度的顺序 $10^{20}~\text{W}/\text{cm}^{2}$ ，实现了高达 93 MeV 的质子能量。此外，转换效率为 $45^{\circ}$ 当将激光偏振改变为 p 时，入射角增加，使得质子能量和粒子数与法向入射和 s 偏振的情况相似，但减少了最后一个聚焦光学元件上的碎片。