强激光与粒子束2025，Vol.37Issue(5)：157-163,7.DOI:10.11884/HPLPB202537.240269
基于衍射成像的高分辨X射线诊断技术仿真研究
Simulation research on high resolution X-ray diagnosis technology based on diffraction imaging
摘要
Abstract
To study the hydrodynamic instability in laser fusion implosion,X-ray diagnostic technology with large field of view and high resolution is needed.Fresnel zone plate(FZP)is a kind of circular aperiodic grating structure,which can realize high spatial resolution imaging of X-ray.In this paper,the simulation research of high-resolution X-ray diagnosis technology based on diffraction imaging is carried out,showing the application prospects of FZP for hydrodynamic instability research.Based on the diffraction theory,the theoretical model of FZP is established,and the structural parameters of FZP with working energy point of 8.04 keV are designed according to the diagnostic experimental environment.Based on the optical simulation model,the color difference of FZP imaging is simulated,and the relationship between spatial resolution and spectral bandwidth is given.The simulation results show that the bandwidth of light source is less than 0.2 keV,and the resolution of FZP is better than 3 μm.The simulation of grid backlight imaging shows that FZP can achieve good resolution(less than 3 μm)within 0.8 mm field of view.关键词
热核聚变/X射线成像诊断/流体不稳定性增长/菲涅耳波带片/OASYS模型仿真Key words
thermonuclear fusion/X-ray imaging diagnosis/fluid instability growth/FZP/OASYS model simulation分类
数理科学引用本文复制引用
李锦波,徐捷,穆宝忠,王新..基于衍射成像的高分辨X射线诊断技术仿真研究[J].强激光与粒子束,2025,37(5):157-163,7.基金项目
国家重点研发计划项目(2023YFA1608400) （2023YFA1608400）
