论文标题
来自模拟的小角针孔图像的集成内爆目标的三维重建
Three-dimensional reconstruction of integrated implosion targets from simulated small-angle pinhole images
论文作者
论文摘要
为了在有限的测量条件下间接评估惯性限制融合研究中辐射驱动的不对称性，我们提出了一种积分方法，以近似于压缩等离子体芯的三维自辐射分布，仅使用来自单个激光器入口的四个针孔图像以10°的最大投影角度使用来自单个激光孔的四个针孔图像。模拟中使用了先前结构信息和中央针孔图像提供的空间约束的同时代数重建技术（SART）。模拟结果表明，模拟腔的中央辐射区域的原始分布和重建结果之间的归一化均方根偏差为0.4401，腔辐射分布的结构相似性为0.5566。同时，使用更多的诊断孔可以实现更好的结构相似性和较低的重建误差。此外，结果表明，我们的新提出的方法可以以很高的精度重建压缩等离子体芯的分布。
To indirectly evaluate the asymmetry of the radiation drive under limited measurement conditions in inertial confinement fusion research, we have proposed an integral method to approximate the three-dimensional self-radiation distribution of the compressed plasma core using only four pinhole images from a single laser entrance hole at a maximum projection angle of 10°. The simultaneous algebraic reconstruction technique (SART) that uses spatial constraints provided by the prior structural information and the central pinhole image is utilized in the simulation. The simulation results showed that the normalized mean square deviation between the original distribution and reconstruction results of the central radiation area of the simulated cavity was 0.4401, and the structural similarity of the cavity radiation distribution was 0.5566. Meanwhile, using more diagnostic holes could achieve better structural similarity and lower reconstruction error. In addition, the results indicated that our new proposed method could reconstruct the distribution of a compressed plasma core in a vacuum hohlraum with high accuracy.
