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arXiv 1809.06115physics.plasm-ph
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Laser驱动的真空击穿波

Laser-driven vacuum breakdown waves

A. S. Samsonov, E. N. Nerush, I. Yu. Kostyukov

摘要:

通过三维量子电动力学--粒子模拟(QED-PIC),证明了真空击穿波以QED级联阵面的形式在极强的平面电磁波中传播。这一结果否定了平面波位形不可能产生自持级联的说法。在模拟过程中,叶栅在光帆状态下的激光-箔片相互作用期间启动。结果,在箔和激光辐射之间形成不断增长的电子-正电子等离子体垫。缓冲等离子体有效地吸收激光能量,并使来自移动箔的辐射发散,从而中断离子加速。文中给出了描述叶栅前缘传播和垫等离子体电动力学的模型,它们的预测与数值模拟的结果定性一致。

英文摘要:

It is demonstrated by three-dimensional quantum electrodynamics --- particle-in-cell (QED-PIC) simulations that vacuum breakdown wave in the form of QED cascade front can propagate in an extremely intense plane electromagnetic wave. The result disproves the statement that the self-sustained cascading is not possible in a plane wave configuration. In the simulations the cascade initiates during laser-foil interaction in the light sail regime. As a result, a constantly growing electron-positron plasma cushion is formed between the foil and laser radiation. The cushion plasma efficiently absorbs the laser energy and decouples the radiation from the moving foil thereby interrupting the ion acceleration. The models describing propagation of the cascade front and electrodynamics of the cushion plasma are presented and their predictions are in a qualitative agreement with the results of numerical simulations.

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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