Improved fast electron transport through the use of foam guides
Improved fast electron transport through the use of foam guides
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DOI：
10.1063/5.0011723
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发表时间：
2020-09
影响因子：
2.2
通讯作者：
R. Alraddadi;A. Robinson;N. Woolsey
中科院分区：
文献类型：
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作者：
R. Alraddadi;A. Robinson;N. Woolsey
超强激光作用于固体靶导致高吸收的观察结果令人兴奋的应用，但携带这种能量的快速电子的高发散性仍然是发展许多概念的关键限制。我们使用三维模拟如何低密度泡沫填充电阻导向目标导致快速电子准直在扩展的距离。我们的分析表明，在泡沫中的电阻电流的长的平均自由路径导致良好的准直。我们介绍了使用复合材料的概念，或混合电阻的指导目标，耦合的固体密度的指导高激光吸收和强准直的优势，与低散射性能和长的运输距离的泡沫填充的指导。
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.