Design of a five-layers multi-energy X-ray imaging detector for material sorting

Ziqi Wu; Wenbao Jia; Yunlong Wu; DaQian Hei; Aiyun Sun; Yongsheng Ling; Qing Shan; Chao Shi; Jiandong Zhang

doi:10.1016/j.apradiso.2023.110711

Design of a five-layers multi-energy X-ray imaging detector for material sorting

Appl Radiat Isot. 2023 Apr:194:110711. doi: 10.1016/j.apradiso.2023.110711. Epub 2023 Feb 2.

Authors

Ziqi Wu¹, Wenbao Jia¹, Yunlong Wu¹, DaQian Hei², Aiyun Sun³, Yongsheng Ling¹, Qing Shan¹, Chao Shi¹, Jiandong Zhang¹

Affiliations

¹ Department of Nuclear Science and Technology, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China.
² School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China.
³ Department of Nuclear Science and Technology, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China. Electronic address: say17@nuaa.edu.cn.

PMID: 36804701
DOI: 10.1016/j.apradiso.2023.110711

Abstract

X-ray transmission imaging (XRT) is widely used for sorting materials. However, conventional single-energy and dual-energy X-ray systems have poor ability to discriminate between materials with similar atomic number (Z), and the count rate of available multi-energy XRT detectors could not support high-speed industrial applications. This paper presents the design of a detector that can potentiality achieve high-speed multi-energy X-ray imaging using Geant4 simulations. This detector consisted of five detection layers (with three scintillator materials: CsI, GOS and CdWO₄), two metal filters, which allows X-ray imaging at five energies. Validation simulation showed that the 15% more accurate than a dual-layers detector in the classification of Mg and Al alloys.

Keywords: Material sorting; Multi-energy; Scintillator detector; X-ray imaging.