Towards a muon scattering tomography system for both low-Z and high-Z materials
arXiv:2304.09489 · doi:10.1088/1748-0221/18/08/P08008
Abstract
Muon scattering tomography (MST) is a non-destructive technique to image various materials by utilizing cosmic ray muons as probes. A typical MST system with a two-fold track detectors is particularly effective in detecting high- materials (e.g. nuclear materials), but difficult to recognize low- materials (e.g. explosive materials). In this work, we present a concept of MST system to discriminate both low- and high- materials by extra measuring momentum of low-energy muons with a Cherenkov detector. A toy Monte Carlo simulation to describe detector responses and multiple scatterings of a muon tracking through materials is developed for statistical tests. Based on momentum-dependent track reconstruction and image reconstruction algorithm, we evaluate separation powers of different materials in the system. The results show that momentum measurement of low-energy muons and accurate track reconstruction can improve separation power of low- materials significantly. This may enable the MST system to detect both low- and high- materials with cosmic ray muons in the whole energy range.
arXiv comment20 pages with 14 figures and 1 table
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