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arXiv 1402.3052physics.plasm-phphysics.acc-phphysics.optics
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用几飞秒阴影术直接观测laser尾场加速器的注入动力学

Direct observation of the injection dynamics of a laser wakefield accelerator using few-femtosecond shadowgraphy

A. Sävert, S. P. D. Mangles, M. Schnell, E. Siminos, J. M. Cole, M. Leier, M. Reuter, M. B. Schwab, M. Möller, K. Poder, O. Jäckel, G. G. Paulus, C. Spielmann, … 展开作者

A. Sävert, S. P. D. Mangles, M. Schnell, E. Siminos, J. M. Cole, M. Leier, M. Reuter, M. B. Schwab, M. Möller, K. Poder, O. Jäckel, G. G. Paulus, C. Spielmann, S. Skupin, Z. Najmudin, M. C. Kaluza

摘要:

我们提出了几个飞秒阴影快照期间的非线性演化的等离子体波在激光尾场加速器与横向同步的几个周期的探测脉冲。这些快照可以直接与等离子体波内的电子密度分布相关联,并给出有关其大小和形状的定量信息。我们的研究结果表明,电子自注入到第一等离子体波周期是由第一等离子体周期的延长。三维粒子在细胞模拟支持我们的观察。

英文摘要:

We present few-femtosecond shadowgraphic snapshots taken during the non-linear evolution of the plasma wave in a laser wakefield accelerator with transverse synchronized few-cycle probe pulses. These snapshots can be directly associated with the electron density distribution within the plasma wave and give quantitative information about its size and shape. Our results show that self-injection of electrons into the first plasma wave period is induced by a lengthening of the first plasma period. Three dimensional particle in cell simulations support our observations.

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