A Monte Carlo model of the Dingo thermal neutron imaging beamline.

Jakubowski, K; Chacon, A; Tran, LT; Stopic, A; Garbe, U; Bevitt, J; Olsen, S; Franklin, DR; Rosenfeld, A; Guatelli, S; Safavi-Naeini, M

A Monte Carlo model of the Dingo thermal neutron imaging beamline.

Jakubowski, K Chacon, A Tran, LT Stopic, A Garbe, U Bevitt, J Olsen, S Franklin, DR Rosenfeld, A Guatelli, S Safavi-Naeini, M

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Publisher:: Springer Science and Business Media LLC
Publication Type:: Journal Article
Citation:: Sci Rep, 2023, 13, (1), pp. 17415
Issue Date:: 2023-10-13

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Field	Value	Language
dc.contributor.author	Jakubowski, K
dc.contributor.author	Chacon, A
dc.contributor.author	Tran, LT
dc.contributor.author	Stopic, A
dc.contributor.author	Garbe, U
dc.contributor.author	Bevitt, J
dc.contributor.author	Olsen, S
dc.contributor.author	Franklin, DR
dc.contributor.author	Rosenfeld, A
dc.contributor.author	Guatelli, S
dc.contributor.author	Safavi-Naeini, M
dc.date.accessioned	2023-10-30T00:43:18Z
dc.date.available	2023-10-03
dc.date.available	2023-10-30T00:43:18Z
dc.date.issued	2023-10-13
dc.identifier.citation	Sci Rep, 2023, 13, (1), pp. 17415
dc.identifier.issn	2045-2322
dc.identifier.issn	2045-2322
dc.identifier.uri	http://hdl.handle.net/10453/172893
dc.description.abstract	In 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 [Formula: see text]B[Formula: see text]C-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 [Formula: see text]B[Formula: see text]C-coated microdosimeter measurements, respectively. The logarithms of the ratios of average simulated to experimental fluences in the thermal (E[Formula: see text] 0.414 eV), epithermal (0.414 eV < E[Formula: see text] 11.7 keV) and fast (E[Formula: see text] 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.
dc.format	Electronic
dc.language	eng
dc.publisher	Springer Science and Business Media LLC
dc.relation.ispartof	Sci Rep
dc.relation.isbasedon	10.1038/s41598-023-44035-4
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.rights	Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http:// creativecommons. org/ licenses/ by/4. 0/. © The Author(s) 2023
dc.title	A Monte Carlo model of the Dingo thermal neutron imaging beamline.
dc.type	Journal Article
utslib.citation.volume	13
utslib.location.activity	England
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - CRIN - Realtime Information Networks
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	open_access	*
dc.date.updated	2023-10-30T00:43:11Z
pubs.issue	1
pubs.publication-status	Published online
pubs.volume	13
utslib.citation.issue	1

Abstract:

In 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 [Formula: see text]B[Formula: see text]C-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 [Formula: see text]B[Formula: see text]C-coated microdosimeter measurements, respectively. The logarithms of the ratios of average simulated to experimental fluences in the thermal (E[Formula: see text] 0.414 eV), epithermal (0.414 eV < E[Formula: see text] 11.7 keV) and fast (E[Formula: see text] 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.

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http://hdl.handle.net/10453/172893