Pinhole imaging to observe spatial jitters of a triple-pulse X-ray source on the Dragon-II LIA

• Published in: Nuclear science and techniques Vol. 27; no. 5; pp. 140 - 145
• Main Authors: Wang, Yi, Yang, Zhi-Yong, Jing, Xiao-Bing, Li, Qin, Ding, Heng-Song, Dai, Zhi-Yong
• Format: Journal Article
• Language: English
• Published: Singapore Springer Singapore 01.10.2016; Key Laboratory of Pulsed Power, Institute of Fluid Physics,China Academy of Engineering Physics, Mianyang 621900,China
• Subjects: Energy; Hadrons; Heavy Ions; Nuclear Energy; Nuclear Physics; X射线源; 抖动; 散射光子; 直线感应加速器; 空间; 脉冲; 针孔成像; 高能闪光照相; X-ray source; Linear induction accelerator; Pinhole imaging; Spatial jitter
• ISSN: 1001-8042; 2210-3147
• DOI: 10.1007/s41365-016-0106-6

In high-energy flash radiography, scattered photons degrade the acquiring image, which limits the resolving power of interfaces and density of dense object. The application of large anti-scatter grid can reduce the scattered photons remarkably, but this requires a stable source position in order to reduce the loss of signal photons in the grid structure. The pinhole imaging tech-nique is applied to observe spatial jitters of a triple-pulse radiographic source of a linear induction accelerator. Numerical simulations are conducted to analyze the imaging performance with the same or close parameters of the pinhole object and experimental alignment. Experi-ments are carried out to observe spatial jitters of the source between different measurements. Deviations of the source position between different pulses are measured in each experiment.