The interaction of ultra-intense high-power lasers with solid-state targets has been largely studied for the past 20 years as a future compact proton and ion source. Indeed, the huge potential established on the target surface by the escaping electrons provides accelerating gradients of TV/m. This process, called target normal sheath acceleration, involves a large number of phenomena and is very difficult to study because of the picosecond scale dynamics. At the SPARC_LAB Test Facility, the high-power laser FLAME is employed in experiments with solid targets, aiming to study possible correlations between ballistic fast electrons and accelerated protons. In detail, we have installed in the interaction chamber two different diagnostics, each one devoted to characterizing one beam. The first relies on electro-optic sampling, and it has been adopted to completely characterize the ultrafast electron components. On the other hand, a time-of-flight detector, based on chemical-vapour-deposited diamond, has allowed us to retrieve the proton energy spectrum. In this work, we report preliminary studies about simultaneous temporal resolved measurements of both the first forerunner escaping electrons and the accelerated protons for different laser parameters.

中文翻译：

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在 TNSA 中同时观察超快电子束和质子束

在过去的 20 年中，作为未来紧凑型质子和离子源，超强高功率激光器与固态目标的相互作用得到了广泛的研究。事实上，逃逸电子在目标表面上建立的巨大电势提供了 TV/m 的加速梯度。这个过程称为目标法向鞘加速，涉及大量现象，并且由于皮秒尺度的动力学而很难研究。在 SPARC_LAB 测试设施中，高功率激光 FLAME 用于固体目标实验，旨在研究弹道快电子和加速质子之间可能存在的相关性。详细地说，我们在交互室中安装了两种不同的诊断装置，每一种都专门用于表征一个光束。第一种依靠电光采样，它已被用来完全表征超快电子成分。另一方面，基于化学气相沉积金刚石的飞行时间探测器使我们能够检索质子能谱。在这项工作中，我们报告了关于不同激光参数下第一个逃逸电子和加速质子的同时时间分辨测量的初步研究。