Optimization of the electron beam properties from intense laser pulses interacting with structured gas jets
Optimization of the electron beam properties from intense laser pulses interacting with structured gas jets
复制标题
强激光脉冲与结构化气体射流相互作用的电子束特性的优化
DOI：
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
W. Leemans
中科院分区：
文献类型：
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作者：
K. Swanson;H. Tsai;S. Barber;R. Lehe;H. Mao;S. Steinke;J. van Tilborg;K. Nakamura;C. Geddes;C. Schroeder;E. Esarey;W. Leemans
激光等离子体加速因其能在短距离内产生高能超短电子束而受到广泛研究。通过等离子体传播的高强度激光脉冲通过有质动力将电子从光轴上驱逐出去，留下一列离子，并驱动密度尾流。尾迹中存在的加速电场可以达到比射频腔中的电场大几个数量级，从而使紧凑的系统比使用传统加速器的系统小得多。这种紧凑型光源可以为各种应用提供电子，包括用于高能对撞机的阶段或用于从相干波动器辐射产生x射线脉冲的阶段。然而，这些应用需要可调、稳定和高质量的电子束。我们报道了一项研究，通过精确裁剪毫米尺度气体射流产生的密度分布，沿着激光等离子体加速的电子的冲击波诱导密度下降坡道进行控制注入。利用Bella Center的TREX钛宝石激光器，实验研究了等离子体密度分布和激波波阵面倾角对光束空间分布、转向和能量的影响。为了解释这些关系，我们提出了与实验结果相吻合的简单模型。使用这项技术，电子束质量被量身定做，允许生产高质量的电子束，在一系列能量上具有百分比水平的能量分布。
Laser plasma acceleration has been intensely investigated for its ability to produce energetic, ultrashort electron bunches in a compact distance. A high intensity laser pulse propagating through a plasma expels the electrons from the optical axis via the ponderomotive force, leaving behind a column of ions and driving a density wake. The accelerating electric fields present in the wake can reach several orders of magnitude greater than those found in radio-frequency cavities, allowing for compact systems much smaller than those using conventional accelerators. This compact source can provide electrons for various applications including stages for a high energy collider or for production of x-ray pulses from coherent undulator radiation. However, these applications require tunable, stable and high-quality electron beams. We report on a study of controlled injection along a shock-induced density downramp of laser-plasma- accelerated electrons through precision tailoring of the density profile produced from a mm-scale gas jet. Using BELLA Center’s TREX Ti:Sapphire laser, the effects of the plasma density profile and the tilt of the shock front on the beam spatial profile, steering, and energy were investigated experimentally. To explain these rela- tionships, we propose simple models which agree well with experimental results. Using this technique, electron beam quality was tailored, allowing for the production of high-quality electron beams with percent-level energy spreads over a range of energies.
影响因子：
8.6
作者：
Buck, A.;Wenz, J.;Veisz, L.
通讯作者：
Veisz, L.
影响因子：
8.6
作者：
Guillaume, E.;Doepp, A.;Malka, V.
通讯作者：
Malka, V.
影响因子：
64.8
作者：
Faure, J;Glinec, Y;Malka, V
通讯作者：
Malka, V