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On-shot characterization of single plasma mirror temporal contrast improvement

机译：单位等离子体镜颞对比改善的拍摄特征

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摘要

We report on the setup and commissioning of a compact recollimating single plasma mirror (PM) for temporal contrast enhancement at the Draco 150 TW laser during laser-proton acceleration experiments. The temporal contrast with and without PM is characterized single-shot by means of self-referenced spectral interferometry with extended time excursion at unprecedented dynamic and temporal range. This allows for the first single-shot measurement of the PM trigger point, which is interesting for the quantitative investigation of the complex pre-plasma formation process at the surface of the target used for proton acceleration. As a demonstration of high contrast laser plasma interaction we present proton acceleration results with ultra-thin liquid crystal targets of similar to 1 mu m down to 10 nm thickness. Focus scans of different target thicknesses show that highest proton energies are reached for the thinnest targets at best focus. This indicates that the contrast enhancement is effective such that the acceleration process is not limited by target pre-expansion induced by laser light preceding the main laser pulse.
机译：我们在激光质子加速实验期间报道了在Draco 150 Tw激光器的时间对比度增强的紧凑型倒闭单位镜（PM）的设置和调试。与下PM的时间对比度通过自我参考的光谱干涉测量来表征单次，在前所未有的动态和时间范围内具有延长的时间偏移。这允许PM触发点的第一单次测量，这对于用于质子加速器的靶表面的复杂预血浆形成过程的定量研究是有趣的。作为高对比度激光等离子体相互作用的示范，我们将质子加速度呈现出具有类似于1μm至10nm厚度的超薄液晶靶标。不同目标厚度的聚焦扫描表明，最佳焦点最薄的目标达到了最高的质子能量。这表明对比度增强是有效的，使得加速过程不受由主激光脉冲前面的激光引起的目标预膨胀的限制。

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    Obst L.; Metzkes-Ng J.; Bock S.; Cochran G. E.; Cowan T. E.; Oksenhendler T.; Poole P. L.; Prencipe I.; Rehwald M.; Roedel C.; Schlenvoigt H-P; Schramm U.; Schumacher D. W.; Ziegler T.; Zeil K.;

  • 作者单位

    Helmholtz Zentrum Dresden Rossendorf HZDR Bautzner Landstr 400 D-01328 Dresden Germany;

    Helmholtz Zentrum Dresden Rossendorf HZDR Bautzner Landstr 400 D-01328 Dresden Germany;

    Helmholtz Zentrum Dresden Rossendorf HZDR Bautzner Landstr 400 D-01328 Dresden Germany;

    Ohio State Univ 191 West Woodruff Ave Columbus OH 43210 USA;

    Helmholtz Zentrum Dresden Rossendorf HZDR Bautzner Landstr 400 D-01328 Dresden Germany;

    iTEOX 14 Ave Jean Jaures F-91940 Gometz Le Chatel France;

    Lawrence Livermore Natl Lab 7000 East Ave Livermore CA 94550 USA;

    Helmholtz Zentrum Dresden Rossendorf HZDR Bautzner Landstr 400 D-01328 Dresden Germany;

    Helmholtz Zentrum Dresden Rossendorf HZDR Bautzner Landstr 400 D-01328 Dresden Germany;

    Friedrich Schiller Univ Jena Max Wien Pl 1 D-07743 Jena Germany;

    Helmholtz Zentrum Dresden Rossendorf HZDR Bautzner Landstr 400 D-01328 Dresden Germany;

    Helmholtz Zentrum Dresden Rossendorf HZDR Bautzner Landstr 400 D-01328 Dresden Germany;

    Ohio State Univ 191 West Woodruff Ave Columbus OH 43210 USA;

    Helmholtz Zentrum Dresden Rossendorf HZDR Bautzner Landstr 400 D-01328 Dresden Germany;

    Helmholtz Zentrum Dresden Rossendorf HZDR Bautzner Landstr 400 D-01328 Dresden Germany;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 等离子体物理学;
  • 关键词

    plasma mirrors; laser-particle acceleration; laser-proton acceleration; laser-produced plasmas; laser diagnostics;

    机译：等离子体镜;激光粒子加速度;激光质子加速度;激光产生的等离子体;激光诊断;

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