Multiparametric approach to the assessment of muon tomographic results for the inspection of a full-scale container
Department of Physics and Astronomy E. Majorana, University of Catania, Via S. Sofia 64, 95123, Catania, Italy
2 INFN, Sezione di Catania, Via S. Sofia 64, 95123, Catania, Italy
3 Department of Physics and Astronomy, University of Pittsburgh, 100 Allen Hall, 3941 O’Hara St., 15260, Pittsburgh, PA, USA
4 INAF, Osservatorio Astrofisico di Catania, Via S. Sofia 78, 95123, Catania, Italy
5 STMicroelectronics, Stradale Primosole 50, 95121, Catania, Italy
6 INFN, Laboratorio Nazionale del Sud, Via S. Sofia 62, 95125, Catania, Italy
Accepted: 25 November 2020
Published online: 25 January 2021
Experimental results from a dataset collected with a full-scale muon tomograph for the inspection of cargo containers were studied in a single scattering scenario with a multiparametric analysis based on the method of the Point Of Closest Approach (Poca). To search for high-Z materials, a 4 Pb block was positioned inside the volume to be inspected, in order to quantitatively investigate the appearance of the Poca signal. Signal-to-noise ratio and significance of the Poca signal were investigated by means of mono-dimensional spectra of the Poca components, for different values of the scattering angle between the incoming and outgoing muon tracks and with different angle-dependent weights. A systematic scan of two-dimensional maps was also carried out, as a strategy to search for possible enhancements to the Poca signal. A comparison was also done between the results obtained from the two half-volumes, one containing the Pb block and one left empty, to take into account the response of the detector and some aspects of the Poca strategy.
© The Author(s) 2021
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