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arXiv 1807.09747physics.plasm-ph
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QED级联的真实模拟:非理想laser和电子播种效应

Towards realistic simulations of QED cascades: non-ideal laser and electron seeding effects

Archana Sampath, Matteo Tamburini

摘要:

大量的分析和数值研究已经被用来研究在两个反向传播的激光脉冲碰撞中作为激光强度的函数的QED级联的发生和发展。然而,它最近被证明[M]。Tamburini等人,Sci. Rep. 7,5694(2017)],QED级联的发生也受到激光脉冲结构的强烈影响,例如激光脉冲腰半径。在这里,我们研究了QED级联如何受到以下因素的影响:(a)激光脉冲持续时间,(b)激光脉冲峰值到达焦点的相对延迟的存在,(c)两个激光脉冲的激光焦轴之间存在失配。这一点尤其重要,因为在实际的实验室条件下,激光器的时间和点稳定性可能会出现波动。

英文摘要:

A number of analytical and numerical studies has been performed to investigate the onset and the development of QED cascades in the collision of two counterpropagating laser pulses as a function of the laser intensity. However, it has been recently demonstrated [M. Tamburini et al., Sci. Rep. 7, 5694 (2017)] that the onset of QED cascades is also strongly influenced by the structure of the laser pulses, such as the laser pulse waist radius. Here we investigate how QED cascades are affected by: (a) the laser pulse duration, (b) the presence of a relative delay for the peak of the laser pulses to reach the focus, (c) the existence of a mismatch between the laser focal axis of the two laser pulses. This is especially important as, in realistic laboratory conditions, fluctuations may arise in the temporal and point stability of the lasers.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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