Laser-Wakefield Electron Beams as Drivers of High-Quality Positron Beams and Inverse-Compton-Scattered Photon Beams
Laser-Wakefield Electron Beams as Drivers of High-Quality Positron Beams and Inverse-Compton-Scattered Photon Beams
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DOI：
10.3389/fphy.2019.00049
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发表时间：
2019-04
影响因子：
3.1
通讯作者：
A. Alejo;G. M. Samarin;J. Warwick;G. Sarri
中科院分区：
文献类型：
--
作者：
A. Alejo;G. M. Samarin;J. Warwick;G. Sarri
激光尾场电子加速的快速发展，最近已经达到了产生具有极端特性的电子束的顶峰，包括飞秒量级的持续时间、Mrad发散和高能。现在，使用小规模的商用激光系统，通过厘米级加速器演示多GeV电子束，每个粒子的能量为数百MeV，通常可以获得数十到数百个pC的电荷。这种电子束与固体靶或第二个高功率激光焦点的相互作用可以产生高质量的正电子束和MeV光子束。这些二次源无与伦比的特性使它们成为基本和实际应用的理想选择。在这篇文章中，将讨论它们的一些主要特征，特别强调它们在基础物理和应用物理中的潜在应用。还将讨论近期激光设施可能带来的未来发展。
The fast-paced development of laser-wakefield electron acceleration has recently culminated in the generation of electron beams with extreme characteristics, including femtosecond-scale duration, mrad divergence, and high-energy. It is now customary to attain tens to hundreds of pC of charge with an energy of hundreds of MeV per particle with small-scale commercial laser systems, with multi-GeV electron beams being demonstrated from cm-scale accelerators. The interaction of such electron beams with either a solid target or the focus of a second high-power laser can result in the generation of high-quality positron beams and MeV-photon beams. The unrivalled properties of these secondary sources make them ideal for both fundamental and practical applications. In the present article, some of their main characteristics will be discussed, with particular emphasis on their potential applications in fundamental and applied physics. A discussion of potential future developments enabled by near-term laser facilities will also be presented.