现代应用物理2026，Vol.17Issue(4)：76-85,10.DOI:10.12061/j.issn.2095-6223.202603015
脉冲辐射源三维成像系统的性能参数研究
Study on the Performance Parameters of 3D Imaging System for Pulsed Radiation Source
张艳红 1盛亮 1李阳 1张骞 1高建鹏 1张美 1涂艳云 1刘振 1赵吉祯1
作者信息
摘要
Abstract
Three-dimensional(3D)imaging of X-ray and neutron emissions from pulsed radiation sources is crucial for understanding the complex morphology of inertial confinement fusion(ICF)and Z-pinch plasmas.However,due to spatial constraints in experimental facilities,the number of available imaging axes is very limited,typically no more than five,leading to a severely ill-posed problem in computed tomography(CT)reconstruction.Consequently,the design of reconstruction algorithms and the performance parameters of multi-axis joint diagnostic systems are key factors determining the reconstruction quality.Focusing on the implosion structure characteristics in ICF experiments,this paper investigates the effect of spatial configuration and systematic errors of a multi-axis pinhole imaging system on the 3D reconstruction of radiation sources.Based on a limited-angle 3D reconstruction algorithm that uses cylindrical harmonic decomposition(CHD)to constrain the initial values for iterative methods,this paper simulates the reconstruction performance of 2 to 5 imaging axes with different spatial layouts.The results indicate that optimal spatial configurations fall into two categories.When the number of projection angles is two or three,the imaging axes should be arranged perpendicular to the quasi-symmetry axis and uniformly distributed in the horizontal plane.As the number of axes increases,incorporating one imaging axis along the quasi-symmetry axis yields superior reconstruction quality with very few viewing angles.Among various system errors,the center correlation error has the greatest detrimental impact on reconstruction quality.In a simulated triaxis equiangular configuration,a misalignment of 7.94％in both horizontal and vertical directions between two imaging axes causes the structural similarity(SSIM)index to drop to 0.843 5.The size-ratio correlation error has a moderate effect,while the azimuthal angular correlation error exhibits the least influence.These findings provide data-driven guidance for the structural design of multi-axis joint diagnostic systems in ICF facilities.关键词
3维图像重建/空间布局/系统偏差/准对称轴/脉冲辐射源Key words
3D image reconstruction/spatial configuration/systematic error/quasi-symmetry axis/pulsed radiation source分类
数理科学引用本文复制引用
张艳红,盛亮,李阳,张骞,高建鹏,张美,涂艳云,刘振,赵吉祯..脉冲辐射源三维成像系统的性能参数研究[J].现代应用物理,2026,17(4):76-85,10.
