Sub-femtosecond electron bunches created by direct laser acceleration in a laser wakefield accelerator with ionization injection
Sub-femtosecond electron bunches created by direct laser acceleration in a laser wakefield accelerator with ionization injection
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在具有电离注入的激光尾场加速器中通过直接激光加速产生的亚飞秒电子束
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
C. Joshi
中科院分区：
文献类型：
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作者：
N. Lemos;J. Shaw;K. Marsh;C. Joshi
在这项工作中，我们将通过三维粒子模拟表明，直接激光加速在激光韦克菲尔德加速器可以产生亚飞秒电子聚束。用两个激光脉冲持续时间进行两个模拟，使得最短的激光脉冲仅占据第一气泡的一部分，而较长的脉冲填充整个第一气泡。在后一种情况下，当被捕获的电子向前移动并与激光脉冲的高强度区域相互作用时，自然发生微聚束，产生0.5 fs的电子聚束。这在短脉冲模拟中没有观察到。
In this work, we will show through three-dimensional particle-in-cell simulations that direct laser acceleration in laser a wakefield accelerator can generate sub-femtosecond electron bunches. Two simulations were done with two laser pulse durations, such that the shortest laser pulse occupies only a fraction of the first bubble, whereas the longer pulse fills the entire first bubble. In the latter case, as the trapped electrons moved forward and interacted with the high intensity region of the laser pulse, micro-bunching occurred naturally, producing 0.5 fs electron bunches. This is not observed in the short pulse simulation.