High Power Laser Science and Engineering
High Power Laser Science and Engineering
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发表时间：
2015
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通讯作者：
Kazuhisa Nakajima;H. T. Kim;T. M. Jeong;C. H. Nam
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作者：
Kazuhisa Nakajima;H. T. Kim;T. M. Jeong;C. H. Nam
近年来，利用高功率激光器在激光驱动等离子体加速器方面取得了很大的进展，利用激光韦克菲尔德加速机制，电子束可以在厘米尺度的等离子体中被加速到多GeV的能量。虽然迄今为止，世界范围内对激光等离子体加速器的研究一直集中在为基础科学、医学和工业应用创造紧凑的粒子和辐射源，但人们对高能物理学和天体物理学的应用产生了极大的兴趣，探索前所未有的高能前沿现象。在此背景下，我们提出了一个概述的实验成果，在激光等离子体加速的GeV级电子束的生产的角度来看，并推导出能够自洽地预测实验结果的标度公式，考虑到相对论激光脉冲通过等离子体的传播和加速场的减少，由于光束加载。最后，我们提出了10-GeV级激光等离子体加速，这是预期在近期的实验通过拍瓦级激光器的设计实例。
Recently there has been great progress in laser-driven plasma-based accelerators by exploiting high-power lasers, where electron beams can be accelerated to multi-GeV energy in a centimeter-scale plasma due to the laser wakefield acceleration mechanism. While, to date, worldwide research on laser plasma accelerators has been focused on the creation of compact particle and radiation sources for basic sciences, medical and industrial applications, there is great interest in applications for high-energy physics and astrophysics, exploring unprecedented high-energy frontier phenomena. In this context, we present an overview of experimental achievements in laser plasma acceleration from the perspective of the production of GeV-level electron beams, and deduce the scaling formulas capable of predicting experimental results self-consistently, taking into account the propagation of a relativistic laser pulse through plasma and the accelerating field reduction due to beam loading. Finally, we present design examples for 10-GeV-level laser plasma acceleration, which is expected in near-term experiments by means of petawatt-class lasers.