A Monte Carlo model of the Dingo thermal neutron imaging beamline

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dc.contributor.authorJakubowski, Ken_AU
dc.contributor.authorCharcon, Aen_AU
dc.contributor.authorTran, LTen_AU
dc.contributor.authorStopic, Aen_AU
dc.contributor.authorGarbe, Uen_AU
dc.contributor.authorBevitt, JJen_AU
dc.contributor.authorOlsen, SRen_AU
dc.contributor.authorFranklin, DRen_AU
dc.contributor.authorRosenfeld, ABen_AU
dc.contributor.authorGuatelli, Sen_AU
dc.contributor.authorSafavi-Naeini, Men_AU
dc.date.accessioned2024-10-04T00:54:05Zen_AU
dc.date.available2024-10-04T00:54:05Zen_AU
dc.date.issued2023-12-01en_AU
dc.date.statistics2024-10-02en_AU
dc.description.abstractIn this study, we present a validated Geant4 Monte Carlo simulation model of the Dingo thermal neutron imaging beamline at the Australian Centre for Neutron Scattering. The model, constructed using CAD drawings of the entire beam transport path and shielding structures, is designed to precisely predict the in-beam neutron field at the position at the sample irradiation stage. The model’s performance was assessed by comparing simulation results to various experimental measurements, including planar thermal neutron distribution obtained in-beam using gold foil activation and BC-coated microdosimeters and the out-of-beam neutron spectra measured with Bonner spheres. The simulation results demonstrated that the predicted neutron fluence at the field’s centre is within 8.1% and 2.1% of the gold foil and BC-coated microdosimeter measurements, respectively. The logarithms of the ratios of average simulated to experimental fluences in the thermal (E 0.414 eV), epithermal (0.414 eV < E 11.7 keV) and fast (E 11.7 keV) spectral regions were approximately − 0.03 to + 0.1, − 0.2 to + 0.15, and − 0.4 to + 0.2, respectively. Furthermore, the predicted thermal, epithermal and fast neutron components in-beam at the sample stage position constituted approximately 18%, 64% and 18% of the total neutron fluence. © The Authors - Open Access Open Access This article is licensed under a Creative Commons Attribution 4.0 International.en_AU
dc.description.sponsorshipThis research was undertaken with the support of Tesla high-performance computing cluster at ANSTO and by the Australian Government’s National Collaborative Research Infrastructure Strategy (NCRIS), with access to computational resources provided by the Gadi through the National Computational Merit Allocation Scheme. The authors wish to acknowledge the support of the University of Wollongong Matching Scholarship and the International Postgraduate Tuition Award, and the Australian Institute of Nuclear Science and Engineering (AINSE) Residential Student Scholarship (RSS).en_AU
dc.format.mediumElectronicen_AU
dc.identifier.articlenumber17415en_AU
dc.identifier.citationJakubowski, K., Chacon, A., Tran, L. T., Stopic, A., Garbe, U., Bevitt, J., Olsen, S., Franklin, D. R., Rosenfeld, A., Guatelli, S., & Safavi-Naeini, M. (2023). A Monte Carlo model of the Dingo thermal neutron imaging beamline. Scientific Reports, 13(1), 17415. doi:10.1038/s41598-023-44035-4en_AU
dc.identifier.issn2045-2322en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitleScientific Reportsen_AU
dc.identifier.pagination17415-en_AU
dc.identifier.urihttps://doi.org/10.1038/s41598-023-44035-4en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15733en_AU
dc.identifier.volume13en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherSpringer Natureen_AU
dc.subjectNeutronsen_AU
dc.subjectMonte Carlo Methoden_AU
dc.subjectShieldingen_AU
dc.subjectBeamsen_AU
dc.subjectIrradiationen_AU
dc.subjectSimulationen_AU
dc.subjectNeutron fluenceen_AU
dc.subjectMeasuring instrumentsen_AU
dc.subjectBonner Sphere Spectrometersen_AU
dc.titleA Monte Carlo model of the Dingo thermal neutron imaging beamlineen_AU
dc.typeJournal Articleen_AU
dcterms.dateAccepted2023-10-03en_AU
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