The observation that ultra-intense lasers acting on solid targets results in high absorption is exciting for applications, but the high divergence of the fast electrons carrying this energy remains a key limitation for developing many concepts. We show using three-dimensional simulations how low-density foam filled resistive guide targets lead to fast electron collimation over extended distance. Our analysis shows that long mean free paths of the resistive currents in a foam leads to good collimation. We introduce the use of composite concepts, or hybrid resistive guide target, that couples the advantage of high laser absorption and strong collimation of solid-density guides, with the low-scattering properties and long transport distances of foam-filled guides.

中文翻译：

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通过使用泡沫导板改进了快速电子传输

观察到作用在固体目标上的超强激光会导致高吸收，这对于应用来说是令人兴奋的，但携带这种能量的快速电子的高发散度仍然是发展许多概念的关键限制。我们使用 3D 模拟展示了低密度泡沫填充的电阻导向目标如何导致长距离上的快速电子准直。我们的分析表明，泡沫中电阻电流的长平均自由路径会导致良好的准直。我们介绍了复合概念或混合电阻导向目标的使用，它将高激光吸收和固体密度导向强准直的优势与泡沫填充导向的低散射特性和长传输距离相结合。