Deconvolution methods used for the development of a neutron spectrometer

To fulfill the requirements of the industry, the feasibility of a transportable neutron spectrometer is under study by our collaboration. Preliminary studies have led to a solution based on a unique-multi-detectors-Bonner sphere, which has the advantage to simultaneously perform many neutrons-measur...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Simonetti Claude-Alexandre, Labalme Marc, Trolet Jean-Lionel, Mary Patrick
Formato:	article
Lenguaje:	EN
Publicado:	EDP Sciences 2021
Materias:	environmental and medical sciences unfolding methods monte-carlo simulations Physics QC1-999
Acceso en línea:	https://doaj.org/article/8899d1605c5944978e6c90193b09cca0
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:8899d1605c5944978e6c90193b09cca0
record_format	dspace
spelling	oai:doaj.org-article:8899d1605c5944978e6c90193b09cca02021-12-02T17:12:46ZDeconvolution methods used for the development of a neutron spectrometer2100-014X10.1051/epjconf/202125309003https://doaj.org/article/8899d1605c5944978e6c90193b09cca02021-01-01T00:00:00Zhttps://www.epj-conferences.org/articles/epjconf/pdf/2021/07/epjconf_animma2021_09003.pdfhttps://doaj.org/toc/2100-014XTo fulfill the requirements of the industry, the feasibility of a transportable neutron spectrometer is under study by our collaboration. Preliminary studies have led to a solution based on a unique-multi-detectors-Bonner sphere, which has the advantage to simultaneously perform many neutrons-measurements through thermal neutron detectors placed at different depths inside a polyethylene sphere. The incident neutron energy is then reconstructed using unfolding methods. The optimization of the layout of the detectors in the sphere and of the diameter of the sphere was performed thanks to GEANT4 simulations, coupled to unfolding methods such as least-squares, maximum of entropy or maximum of likelihood. Different unfolding methods have been tested. For the time being, the best unfolding results were obtained by the computer codes M.A.X.E.D. and G.R.A.V.E.L., formalized by the Nuclear Energy Agency (N.E.A.). A “personal” method based on the maximum of entropy coupled to the maximum of likelihood gives good results as well, but a few convergence parameters have still to be optimized. In the present paper, a solution of a multi-detectors-Bonner sphere is presented as well as results of unfolded neutron energy spectra. The results obtained show a good agreement with unmoderated and moderated Am/Be and 252Cf spectra.Simonetti Claude-AlexandreLabalme MarcTrolet Jean-LionelMary PatrickEDP Sciencesarticleenvironmental and medical sciencesunfolding methodsmonte-carlo simulationsPhysicsQC1-999ENEPJ Web of Conferences, Vol 253, p 09003 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	environmental and medical sciences unfolding methods monte-carlo simulations Physics QC1-999
spellingShingle	environmental and medical sciences unfolding methods monte-carlo simulations Physics QC1-999 Simonetti Claude-Alexandre Labalme Marc Trolet Jean-Lionel Mary Patrick Deconvolution methods used for the development of a neutron spectrometer
description	To fulfill the requirements of the industry, the feasibility of a transportable neutron spectrometer is under study by our collaboration. Preliminary studies have led to a solution based on a unique-multi-detectors-Bonner sphere, which has the advantage to simultaneously perform many neutrons-measurements through thermal neutron detectors placed at different depths inside a polyethylene sphere. The incident neutron energy is then reconstructed using unfolding methods. The optimization of the layout of the detectors in the sphere and of the diameter of the sphere was performed thanks to GEANT4 simulations, coupled to unfolding methods such as least-squares, maximum of entropy or maximum of likelihood. Different unfolding methods have been tested. For the time being, the best unfolding results were obtained by the computer codes M.A.X.E.D. and G.R.A.V.E.L., formalized by the Nuclear Energy Agency (N.E.A.). A “personal” method based on the maximum of entropy coupled to the maximum of likelihood gives good results as well, but a few convergence parameters have still to be optimized. In the present paper, a solution of a multi-detectors-Bonner sphere is presented as well as results of unfolded neutron energy spectra. The results obtained show a good agreement with unmoderated and moderated Am/Be and 252Cf spectra.
format	article
author	Simonetti Claude-Alexandre Labalme Marc Trolet Jean-Lionel Mary Patrick
author_facet	Simonetti Claude-Alexandre Labalme Marc Trolet Jean-Lionel Mary Patrick
author_sort	Simonetti Claude-Alexandre
title	Deconvolution methods used for the development of a neutron spectrometer
title_short	Deconvolution methods used for the development of a neutron spectrometer
title_full	Deconvolution methods used for the development of a neutron spectrometer
title_fullStr	Deconvolution methods used for the development of a neutron spectrometer
title_full_unstemmed	Deconvolution methods used for the development of a neutron spectrometer
title_sort	deconvolution methods used for the development of a neutron spectrometer
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/8899d1605c5944978e6c90193b09cca0
work_keys_str_mv	AT simonetticlaudealexandre deconvolutionmethodsusedforthedevelopmentofaneutronspectrometer AT labalmemarc deconvolutionmethodsusedforthedevelopmentofaneutronspectrometer AT troletjeanlionel deconvolutionmethodsusedforthedevelopmentofaneutronspectrometer AT marypatrick deconvolutionmethodsusedforthedevelopmentofaneutronspectrometer
_version_	1718381389757284352

Deconvolution methods used for the development of a neutron spectrometer

Ejemplares similares