Stable femtosecond X-rays with tunable polarization from a laser-driven accelerator.
Stable femtosecond X-rays with tunable polarization from a laser-driven accelerator.
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DOI：
10.1038/lsa.2017.86
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发表时间：
2017-11
期刊：
影响因子：
--
通讯作者：
Ta Phuoc K
中科院分区：
文献类型：
--
作者：
Döpp A;Mahieu B;Lifschitz A;Thaury C;Doche A;Guillaume E;Grittani G;Lundh O;Hansson M;Gautier J;Kozlova M;Goddet JP;Rousseau P;Tafzi A;Malka V;Rousse A;Corde S;Ta Phuoc K
基于高峰值功率激光器的技术有可能为广泛的创新应用提供紧凑而强烈的辐射源。特别地，在强激光脉冲的韦克菲尔德加速的电子围绕传播轴振荡并发射X射线。这种电子感应加速器源基本上再现了毫米级同步加速器的原理，提供了具有飞秒持续时间和高空间相干性的明亮辐射。然而，尽管有其独特的功能，电子感应加速器源的可用性受到其控制和稳定性差的限制。在这篇文章中，我们证明了可靠的生产与可调偏振的X射线光束。使用电离诱导注入气体混合物中，发射辐射的相对论电子的轨道是可再现的和可控的。我们观察到，信号和光束轮廓波动显着减少，光束指向变化小于十分之一的光束发散。偏振比达到80%，偏振轴可以很容易地旋转。我们预计该源将产生广泛的影响，因为其前所未有的性能为新的应用程序开辟了道路。
Technology based on high-peak-power lasers has the potential to provide compact and intense radiation sources for a wide range of innovative applications. In particular, electrons that are accelerated in the wakefield of an intense laser pulse oscillate around the propagation axis and emit X-rays. This betatron source, which essentially reproduces the principle of a synchrotron at the millimeter scale, provides bright radiation with femtosecond duration and high spatial coherence. However, despite its unique features, the usability of the betatron source has been constrained by its poor control and stability. In this article, we demonstrate the reliable production of X-ray beams with tunable polarization. Using ionization-induced injection in a gas mixture, the orbits of the relativistic electrons emitting the radiation are reproducible and controlled. We observe that both the signal and beam profile fluctuations are significantly reduced and that the beam pointing varies by less than a tenth of the beam divergence. The polarization ratio reaches 80%, and the polarization axis can easily be rotated. We anticipate a broad impact of the source, as its unprecedented performance opens the way for new applications.
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影响因子：
16.6
作者：
Schnell, Michael;Saevert, Alexander;Uschmann, Ingo;Reuter, Maria;Nicolai, Maria;Kaempfer, Tino;Landgraf, Bjoern;Jaeckel, Oliver;Jansen, Oliver;Pukhov, Alexander;Kaluza, Malte Christoph;Spielmann, Christian
通讯作者：
Spielmann, Christian
影响因子：
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作者：
McGuffey, C.;Thomas, A. G. R.;Karpeev, A. V.
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Karpeev, A. V.
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8.6
作者：
Pak, A.;Marsh, K. A.;Joshi, C.
通讯作者：
Joshi, C.
影响因子：
8.6
作者：
Corde, S.;Thaury, C.;Malka, V.
通讯作者：
Malka, V.
通过电离注入从氮气中同时产生准单能电子和电子感应加速器 X 射线
影响因子：
4
作者：
Huang, K.;Li, D. Z.;Chen, L. M.
通讯作者：
Chen, L. M.