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X光弯晶成像金属薄膜面密度测量技术

司昊轩 许昊 杜慧瑶 伊圣振 王占山

司昊轩, 许昊, 杜慧瑶, 等. X光弯晶成像金属薄膜面密度测量技术[J]. 强激光与粒子束, 2023, 35: 112001. doi: 10.11884/HPLPB202335.230161
引用本文: 司昊轩, 许昊, 杜慧瑶, 等. X光弯晶成像金属薄膜面密度测量技术[J]. 强激光与粒子束, 2023, 35: 112001. doi: 10.11884/HPLPB202335.230161
Si Haoxuan, Xu Hao, Du Huiyao, et al. Areal density measurement technology for metal foils based on X-ray bent crystal imaging[J]. High Power Laser and Particle Beams, 2023, 35: 112001. doi: 10.11884/HPLPB202335.230161
Citation: Si Haoxuan, Xu Hao, Du Huiyao, et al. Areal density measurement technology for metal foils based on X-ray bent crystal imaging[J]. High Power Laser and Particle Beams, 2023, 35: 112001. doi: 10.11884/HPLPB202335.230161

X光弯晶成像金属薄膜面密度测量技术

doi: 10.11884/HPLPB202335.230161
基金项目: 国家自然科学基金项目(11875202); 国家重点研发计划项目(2019YFE03080200)
详细信息
    作者简介:

    司昊轩,2130969@tongji.edu.cn

    通讯作者:

    伊圣振, 15006@tongji.edu.cn

    王占山, wangzs@tongji.edu.cn

  • 中图分类号: O434.1

Areal density measurement technology for metal foils based on X-ray bent crystal imaging

  • 摘要: 针对靶用高Z金属薄膜的无损检测需求,提出了一种通过超环面弯晶聚焦型X光单能成像器件,实现金属薄膜均匀性及面密度等参数精确标定的测量技术。该技术即通过高通量、高单能性成像,定量获取薄膜X光透过率及其空间分布,有效提升了面密度测量的精度,同时实现了对其均匀性的高空间分辨评估。从总体方案设计、元器件制备和测试实验等方面开展了深入研究,并评估了各种可能因素对测量不确定度的影响。所发展的超环面弯晶成像系统针对20 keV级的高能X射线在mm尺度内实现了优于5 μm的微区分辨,能谱分辨达到几eV。通过泡沫金样品面密度测量实验证明了技术可行性,相对不确定度优于2%。研究结果为激光惯性约束聚变高Z靶材料的精密无损检测提供了一种新的测量技术,并有望应用于其他需要大视场、高空谱分辨成像的需求领域。
  • 图  1  超环面弯晶面密度测量方案图

    Figure  1.  Scheme diagram of the toroidal crystal to measure areal density

    图  2  Ge $\left\langle 511 \right\rangle $ 超环面弯晶对600目金网的成像结果

    Figure  2.  Image of a 600-mesh gold mesh by Ge $\left\langle 511 \right\rangle $ toroidal crystal

    图  3  X-ray Tracer模拟Ge $\left\langle 511 \right\rangle $ 超环面弯晶的成像及能谱分辨

    Figure  3.  X-ray Tracer simulated imaging and spectroscopic resolution of Ge $\left\langle 511 \right\rangle $ toroidal crystal

    图  4  超环面弯晶测量泡沫金面密度的实验排布

    Figure  4.  Experimental arrangement of toroidal crystal for measuring the areal density of foam gold

    图  5  超环面弯晶泡沫金面密度测量结果

    Figure  5.  Results of areal density measurement of foam gold in toroidal crystal

    图  6  面密度测量不确定度来源及分类

    Figure  6.  Sources and classification of uncertainty of areal density measurement

    表  1  Ge $\left\langle 511 \right\rangle $ 超环面弯晶系统光学结构参数

    Table  1.   Optical structure parameters of toroidal crystal system for Ge $\left\langle 511 \right\rangle $

    crystal material crystal orientation θ/(°) Rm/mm Rs/mm object distance/mm image distance/mm
    Ge $\left\langle 511 \right\rangle $ 77.74 300 286.5 171.01 1 026.05
    下载: 导出CSV

    表  2  Ge $\left\langle 511 \right\rangle $ 测量泡沫金样品面密度

    Table  2.   Ge $\left\langle 511 \right\rangle $ measurement of surface density of foam gold sample

    No. image coordinates/mm direct light count (I0) transmitted light count (I) transmissivity/% areal density/(mg/cm2) thickness/μm
    P_1 (409,276) 3 309 600 18.132 15.856 8.207
    P_2 (432,274) 3 003 590 19.647 15.108 7.820
    P_3 (441,281) 2 871 554 19.296 15.290 7.914
    P_4 (415,298) 3 433 609 17.740 16.055 8.310
    P_5 (436,297) 3 523 624 17.712 16.072 8.319
    P_6 (395,313) 3 450 647 18.754 15.547 8.047
    P_7 (427,324) 3 599 613 17.033 16.432 8.505
    P_8 (403,326) 3 366 594 17.647 16.107 8.337
    下载: 导出CSV
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  • 被引次数: 0
出版历程
  • 收稿日期:  2023-05-31
  • 修回日期:  2023-10-11
  • 录用日期:  2023-10-11
  • 网络出版日期:  2023-10-19
  • 刊出日期:  2023-11-11

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