相对论电子束在laser -等离子体透镜中聚焦的演示
Demonstration of relativistic electron beam focusing by a laser-plasma lens
摘要：
激光等离子体技术有望大幅缩小高能电子加速器的尺寸。它可以使自由电子激光提供给广大的科学界，并进一步推动电子加速器的极限，为高能物理。此外，独特的飞秒性质的来源，使它成为一个有前途的工具，研究超快现象。然而，由于缺乏合适的透镜来传输这种强流电子束，主要是由于它们的发散性，应用受到阻碍。在这里，我们表明，这个问题可以通过使用激光等离子体透镜，其中的场梯度是五个数量级大于传统的光学解决。我们证明了减少了近三个因素的发散，这应该允许一个有效的耦合与传统的光束传输线的光束。
英文摘要：
Laser-plasma technology promises a drastic reduction of the size of high energy electron accelerators. It could make free electron lasers available to a broad scientific community, and push further the limits of electron accelerators for high energy physics. Furthermore the unique femtosecond nature of the source makes it a promising tool for the study of ultra-fast phenomena. However, applications are hindered by the lack of suitable lens to transport this kind of high-current electron beams, mainly due to their divergence. Here we show that this issue can be solved by using a laser-plasma lens, in which the field gradients are five order of magnitude larger than in conventional optics. We demonstrate a reduction of the divergence by nearly a factor of three, which should allow for an efficient coupling of the beam with a conventional beam transport line.
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