Optical control of hard X-ray polarization by electron injection in a laser wakefield accelerator.
Optical control of hard X-ray polarization by electron injection in a laser wakefield accelerator.
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DOI：
10.1038/ncomms3421
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发表时间：
2013
影响因子：
16.6
通讯作者：
Spielmann, Christian
中科院分区：
文献类型：
--
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
激光等离子体粒子加速器可以提供比传统加速器更紧凑的高能辐射源。此外，由于它们在飞秒脉冲中传输辐射，它们可以提高X射线吸收技术的时间分辨率。在这里，我们展示了我们可以测量和控制超短、宽带kev光子脉冲的偏振，该脉冲由基于激光等离子体的电子束源发射。电子轨迹和发射X射线的偏振是由驱动激光脉冲的脉冲前倾角实验控制的。粒子模拟表明，非对称等离子体波可以由倾斜的脉冲前沿和焦斑的非对称光强分布驱动。两者都导致了显著的离轴电子注入，随后是集体电子-电子振荡。我们希望我们的全光学操控方法不仅适用于基于等离子体的X射线源，而且对未来基于激光的粒子加速器也具有重要意义。激光-等离子体加速器驱动的辐射源有可能以比传统加速器更低的成本产生更短的辐射爆发。Schnell等人。展示控制这种源产生的硬X射线爆发的偏振的能力。
Laser-plasma particle accelerators could provide more compact sources of high-energy radiation than conventional accelerators. Moreover, because they deliver radiation in femtosecond pulses, they could improve the time resolution of X-ray absorption techniques. Here we show that we can measure and control the polarization of ultra-short, broad-band keV photon pulses emitted from a laser-plasma-based betatron source. The electron trajectories and hence the polarization of the emitted X-rays are experimentally controlled by the pulse-front tilt of the driving laser pulses. Particle-in-cell simulations show that an asymmetric plasma wave can be driven by a tilted pulse front and a non-symmetric intensity distribution of the focal spot. Both lead to a notable off-axis electron injection followed by collective electron–betatron oscillations. We expect that our method for an all-optical steering is not only useful for plasma-based X-ray sources but also has significance for future laser-based particle accelerators. Radiation sources driven by laser-plasma accelerators have the potential to produce shorter bursts of radiation at lower cost than those based on conventional accelerators. Schnell et al. demonstrate the ability to control the polarization of the bursts of hard X-rays produced by such a source.
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影响因子：
19.6
作者：
Cipiccia, Silvia;Islam, Mohammad R.;Jaroszynski, Dino A.
通讯作者：
Jaroszynski, Dino A.
影响因子：
19.6
作者：
Fuchs, Matthias;Weingartner, Raphael;Gruener, Florian
通讯作者：
Gruener, Florian
影响因子：
8.6
作者：
Popp, A.;Vieira, J.;Karsch, S.
通讯作者：
Karsch, S.
DOI：
10.1109/jstqe.2003.822917
发表时间：
2004-01-01
影响因子：
4.9
作者：
Osvay, K;Kovács, AP;Csatári, M
通讯作者：
Csatári, M
影响因子：
2.1
作者：
Pretzler, G;Kasper, A;Witte, KJ
通讯作者：
Witte, KJ