Optical Control of the Topology of Laser-Plasma Accelerators.
Optical Control of the Topology of Laser-Plasma Accelerators.
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DOI：
10.1103/physrevlett.121.054801
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发表时间：
2018-07
影响因子：
8.6
通讯作者：
J. Vieira;José Tito Mendonça;F. Quéré
中科院分区：
文献类型：
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作者：
J. Vieira;José Tito Mendonça;F. Quéré
我们提出了一种扭曲等离子体加速器，能够产生具有螺旋电流分布的相对论电子涡流束。 The angular momentum of these vortex bunches is quantized, dominates their transverse motion, and results in spiraling particle trajectories around the twisted wakefield.我们专注于激光尾场加速场景，由具有螺旋时空强度分布的激光束（也称为光弹簧）驱动。我们发现这些光弹簧在激发扭曲等离子体尾场时可以旋转，提供了一种新机制来控制扭曲尾场相速度并增强能量增益和超越平面尾场的捕获效率。
We propose a twisted plasma accelerator capable of generating relativistic electron vortex beams with helical current profiles. The angular momentum of these vortex bunches is quantized, dominates their transverse motion, and results in spiraling particle trajectories around the twisted wakefield. We focus on a laser wakefield acceleration scenario, driven by a laser beam with a helical spatiotemporal intensity profile, also known as a light spring. We find that these light springs can rotate as they excite the twisted plasma wakefield, providing a new mechanism to control the twisted wakefield phase velocity and enhance energy gain and trapping efficiency beyond planar wakefields.