精确测量不同时刻的面密度分布信息，是研究高温、高压等极端条件下流体动力学过程物理机制及动态演化过程的主要方法。GeV量级的高能电子照相技术，具有强穿透性（cm量级的金属）、高的密度分辨（1%）、高的时间分辨（ps量级）及高的空间分辨（μm量级）等特点，具备高精度连续诊断的能力，极适用于微喷混合现象、惯性约束核聚变中内爆压缩过程、电炮加载下金属的动态演化过程等流体动力学问题的研究，缺少高效的、适用的面密度定量测量技术是限制其广泛应用于流体动力学研究的主要原因。本课题拟详细研究韧致辐射效应对透射电子散角的影响，考虑特定的迭代算法及束线标定技术，利用已有的高能电子照相理论模型及实验束线，发展基于高能电子照相的高精度的面密度定量测量技术，并明确其实验测量精度，以期为上述流体动力学问题提供一种精确的面密度测量手段。

Measuring the distribution of areal density at different times accurately, is main way to study of hydrodynamics physics principle and dynamic evolutionary process with extreme conditions, such as high temperature and high pressure. GeV high energy electron radiography (HEER), with strong penetrability (cm thick metal), high density resolution (1%), high time resolution (ps magnitude) and high spatial resolution (μm magnitude), has the ability of high-precision continuous diagnosis. It extremely apply to the research of hydrodynamics process, such as eject mixing, inertial confinement fusion (ICF) implosions, dynamic evolutionary process of metal under electrical gun loading. The main reason of application restrictions in hydrodynamics is the lack of scientific and reasonable areal density quantitative testing method. This project proposes to develop a style of areal density quantitative testing method through studying the influence of bremsstrahlung, considering special iterative algorithm and beam calibration technique, using existing high energy electron radiography numerical simulation and experiment beam. And this research will give an explicit measurement precision in experiment. It is hope to provide a precision areal density testing for hydrodynamics.