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arXiv 2212.13404physics.plasm-ph
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通过双尾波注入产生超亮偏振阿秒电子束

Generation of ultrabrilliant polarized attosecond electron bunch via dual-wake injection

Ting Sun, Qian Zhao, Feng Wan, Yousef I. Salamin, Jian-Xing Li

AI总结:

提出双尾波注入方案,利用径向偏振激光产生高亮度、高偏振的阿秒三束电子束,模拟显示其持续约500阿秒,亮度超10^14,偏振超80%,可用于超快成像等。

摘要:

激光尾波加速正在为下一代电子加速器铺平道路,既用于其自身目的,也作为辐射源。本文提出了一种可控的双尾波注入方案,利用径向偏振激光作为驱动器,产生具有高亮度和高偏振的超短三束电子束。我们发现,在准空泡 regime 中,双尾波可以由激光场的横向和纵向分量共同驱动,维持激光调制的尾波场,这有助于三束电子束的亚周期和横向分裂注入。由于激光辅助的集体自旋进动和非抵消的横向自旋,三束电子束的偏振可以高度保持。在我们的三维粒子模拟中,使用几太瓦激光可以产生持续时间约 500 阿秒、六维亮度超过 10^14 A/m^2/0.1% 且偏振度超过 80% 的三束电子束。这样的电子束可以在许多应用中发挥重要作用,例如超快成像、核结构和高能物理研究,以及相干辐射源的运行。

英文摘要:

Laser wakefield acceleration is paving the way for the next generation of electron accelerators, for their own sake and as radiation sources. A controllable dual-wake injection scheme is put forward here to generate an ultrashort triplet electron bunch with high brightness and high polarization, employing a radially polarized laser as a driver. We find that the dual wakes can be driven by both transverse and longitudinal components of the laser field in the quasi-blowout regime, sustaining the laser-modulated wakefield which facilitates the sub-cycle and transversely-split injection of the triplet bunch. {Polarization of the triplet bunch can be highly preserved due to the laser-assisted collective spin precession and the non-canceled transverse spins. In our three-dimensional particle-in-cell simulations, the triplet electron bunch, with duration about $500$ as, six-dimensional brightness exceeding $10^{14}$ A/m$^2$/0.1$\%$ and polarization over $80\%$, can be generated using a few-terawatt laser}. Such an electron bunch could play an essential role in many applications, such as ultrafast imaging, nuclear structure and high-energy physics studies, and the operation of coherent radiation sources.

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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