Generation of a curved plasma channel from a discharged capillary for intense laser guiding

IF 5.2 1区物理与天体物理 Q1 OPTICS

High Power Laser Science and Engineering Pub Date : 2023-05-25 DOI:10.1017/hpl.2023.40

Jian-Long Li, Boyuan Li, X. Zhu, Zewu Bi, X. Wen, Lin Lu, Xiao-Hui Yuan, Feng Liu, Min Chen

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引用次数: 2

Abstract

Abstract Straight plasma channels are widely used to guide relativistic intense laser pulses over several Rayleigh lengths for laser wakefield acceleration. Recently, a curved plasma channel with gradually varied curvature was suggested to guide a fresh intense laser pulse and merge it into a straight channel for staged wakefield acceleration [Phys. Rev. Lett. 120, 154801 (2018)]. In this work, we report the generation of such a curved plasma channel from a discharged capillary. Both longitudinal and transverse density distributions of the plasma inside the channel were diagnosed by analyzing the discharging spectroscopy. Effects of the gas-filling mode, back pressure and discharging voltage on the plasma density distribution inside the specially designed capillary are studied. Experiments show that a longitudinally uniform and transversely parabolic plasma channel with a maximum channel depth of 47.5 μm and length of 3 cm can be produced, which is temporally stable enough for laser guiding. Using such a plasma channel, a laser pulse with duration of 30 fs has been successfully guided along the channel with the propagation direction bent by 10.4°.

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放电毛细管产生弯曲等离子体通道，用于强激光引导

直等离子体通道被广泛用于引导相对论性强激光脉冲在几个瑞利长度上进行激光尾流场加速。最近，人们提出了一种曲率逐渐变化的弯曲等离子体通道，用于引导新的强激光脉冲并将其合并到一个直通道中，以实现分段尾流场加速[物理学]。中国生物医学工程学报，2016,32(1)。在这项工作中，我们报道了从放电的毛细管中产生这样一个弯曲的等离子体通道。通过放电光谱分析，诊断了通道内等离子体的纵向和横向密度分布。研究了充气方式、背压和放电电压对特制毛细管内等离子体密度分布的影响。实验表明，可以制备出纵向均匀、横向抛物状的等离子体通道，通道最大深度为47.5 μm，通道长度为3 cm，该通道在时间上足够稳定，可用于激光引导。利用该等离子体通道，成功地引导了一个持续时间为30 fs的激光脉冲沿该通道传播，其传播方向弯曲10.4°。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

High Power Laser Science and Engineering Physics and Astronomy-Nuclear and High Energy Physics

CiteScore

7.10

自引率

4.20%

发文量

401

审稿时长

21 weeks

期刊介绍： High Power Laser Science and Engineering (HPLaser) is an international, peer-reviewed open access journal which focuses on all aspects of high power laser science and engineering. HPLaser publishes research that seeks to uncover the underlying science and engineering in the fields of high energy density physics, high power lasers, advanced laser technology and applications and laser components. Topics covered include laser-plasma interaction, ultra-intense ultra-short pulse laser interaction with matter, attosecond physics, laser design, modelling and optimization, laser amplifiers, nonlinear optics, laser engineering, optical materials, optical devices, fiber lasers, diode-pumped solid state lasers and excimer lasers.