Femtosecond pulsed laser deposition of a boron thin film aiming at the development of a low-cost neutron detector

Detalhes bibliográficos
Autor(a) principal: COSTA, PRISCILA
Data de Publicação: 2018
Outros Autores: RAELE, MARCUS P., SAMAD, RICARDO E., MACHADO, NOE G.P., VIEIRA JUNIOR, NILSON D., GENEZINI, FREDERICO A., HIGH-POWER LASER MATERIALS PROCESSING: APPLICATIONS, DIAGNOSTICS, AND SYSTEMS, 7th
Tipo de documento: Artigo de conferência
Título da fonte: Repositório Institucional do IPEN
Texto Completo: http://repositorio.ipen.br/handle/123456789/29021
Resumo: Boron thin films were produced using femtosecond pulsed laser deposition aiming at the development of a neutron detector. As neutrons have no charge, in order to detect this particle converter materials are applied, promoting nuclear reactions that result in the emission of charged particles, allowing the neutrons presence to be indirectly inferred. Among the possible conversion materials, 10B has a considerable cross section for thermal neutrons and accessible cost. Furthermore, the nuclear reaction produces easily detectable alpha particles, making it a rational option to develop a low cost and portable neutron detector. The boron ablation threshold fluence has been measured by the Diagonal Scan (Dscan) technique that resulted in the minimum laser energy value of 17.7 (6) ??J and fluence of 5.63(19) J/cm2. Boron deposition was performed varying the pulse energy and deposition duration. The growth rate, morphological and physical aspects of the boron pulsed laser deposition were characterized by a Scanning Electron Microscope and an optical profilometer. The films surfaces have a flaky aspect with eventual droplets which had decayed overtime to a more smooth surface. The studied parameters allowed producing a boron coating with the optimal thickness in order to minimize self-absorption effect in the film, thus increasing efficiency.
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spelling KAIERLE, STEFANHEINEMANN, STEFAN W.COSTA, PRISCILARAELE, MARCUS P.SAMAD, RICARDO E.MACHADO, NOE G.P.VIEIRA JUNIOR, NILSON D.GENEZINI, FREDERICO A.HIGH-POWER LASER MATERIALS PROCESSING: APPLICATIONS, DIAGNOSTICS, AND SYSTEMS, 7th2018-08-08T12:22:15Z2018-08-08T12:22:15ZJanuary 27 - February 01, 2018http://repositorio.ipen.br/handle/123456789/2902110.1117/12.2285896Boron thin films were produced using femtosecond pulsed laser deposition aiming at the development of a neutron detector. As neutrons have no charge, in order to detect this particle converter materials are applied, promoting nuclear reactions that result in the emission of charged particles, allowing the neutrons presence to be indirectly inferred. Among the possible conversion materials, 10B has a considerable cross section for thermal neutrons and accessible cost. Furthermore, the nuclear reaction produces easily detectable alpha particles, making it a rational option to develop a low cost and portable neutron detector. The boron ablation threshold fluence has been measured by the Diagonal Scan (Dscan) technique that resulted in the minimum laser energy value of 17.7 (6) ??J and fluence of 5.63(19) J/cm2. Boron deposition was performed varying the pulse energy and deposition duration. The growth rate, morphological and physical aspects of the boron pulsed laser deposition were characterized by a Scanning Electron Microscope and an optical profilometer. The films surfaces have a flaky aspect with eventual droplets which had decayed overtime to a more smooth surface. The studied parameters allowed producing a boron coating with the optimal thickness in order to minimize self-absorption effect in the film, thus increasing efficiency.Submitted by Marco Antonio Oliveira da Silva (maosilva@ipen.br) on 2018-08-08T12:22:15Z No. of bitstreams: 1 24814.pdf: 1365114 bytes, checksum: 22f9167b9c95a521a8d403819b23fa72 (MD5)Made available in DSpace on 2018-08-08T12:22:15Z (GMT). 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dc.title.pt_BR.fl_str_mv Femtosecond pulsed laser deposition of a boron thin film aiming at the development of a low-cost neutron detector
title Femtosecond pulsed laser deposition of a boron thin film aiming at the development of a low-cost neutron detector
spellingShingle Femtosecond pulsed laser deposition of a boron thin film aiming at the development of a low-cost neutron detector
COSTA, PRISCILA
laser radiation
neutron detectors
boron
thin films
lasers
ablation
scanning electron microscopy
thickness
deposition
title_short Femtosecond pulsed laser deposition of a boron thin film aiming at the development of a low-cost neutron detector
title_full Femtosecond pulsed laser deposition of a boron thin film aiming at the development of a low-cost neutron detector
title_fullStr Femtosecond pulsed laser deposition of a boron thin film aiming at the development of a low-cost neutron detector
title_full_unstemmed Femtosecond pulsed laser deposition of a boron thin film aiming at the development of a low-cost neutron detector
title_sort Femtosecond pulsed laser deposition of a boron thin film aiming at the development of a low-cost neutron detector
author COSTA, PRISCILA
author_facet COSTA, PRISCILA
RAELE, MARCUS P.
SAMAD, RICARDO E.
MACHADO, NOE G.P.
VIEIRA JUNIOR, NILSON D.
GENEZINI, FREDERICO A.
HIGH-POWER LASER MATERIALS PROCESSING: APPLICATIONS, DIAGNOSTICS, AND SYSTEMS, 7th
author_role author
author2 RAELE, MARCUS P.
SAMAD, RICARDO E.
MACHADO, NOE G.P.
VIEIRA JUNIOR, NILSON D.
GENEZINI, FREDERICO A.
HIGH-POWER LASER MATERIALS PROCESSING: APPLICATIONS, DIAGNOSTICS, AND SYSTEMS, 7th
author2_role author
author
author
author
author
author
dc.contributor.editor.none.fl_str_mv KAIERLE, STEFAN
HEINEMANN, STEFAN W.
dc.contributor.author.fl_str_mv COSTA, PRISCILA
RAELE, MARCUS P.
SAMAD, RICARDO E.
MACHADO, NOE G.P.
VIEIRA JUNIOR, NILSON D.
GENEZINI, FREDERICO A.
HIGH-POWER LASER MATERIALS PROCESSING: APPLICATIONS, DIAGNOSTICS, AND SYSTEMS, 7th
dc.subject.por.fl_str_mv laser radiation
neutron detectors
boron
thin films
lasers
ablation
scanning electron microscopy
thickness
deposition
topic laser radiation
neutron detectors
boron
thin films
lasers
ablation
scanning electron microscopy
thickness
deposition
description Boron thin films were produced using femtosecond pulsed laser deposition aiming at the development of a neutron detector. As neutrons have no charge, in order to detect this particle converter materials are applied, promoting nuclear reactions that result in the emission of charged particles, allowing the neutrons presence to be indirectly inferred. Among the possible conversion materials, 10B has a considerable cross section for thermal neutrons and accessible cost. Furthermore, the nuclear reaction produces easily detectable alpha particles, making it a rational option to develop a low cost and portable neutron detector. The boron ablation threshold fluence has been measured by the Diagonal Scan (Dscan) technique that resulted in the minimum laser energy value of 17.7 (6) ??J and fluence of 5.63(19) J/cm2. Boron deposition was performed varying the pulse energy and deposition duration. The growth rate, morphological and physical aspects of the boron pulsed laser deposition were characterized by a Scanning Electron Microscope and an optical profilometer. The films surfaces have a flaky aspect with eventual droplets which had decayed overtime to a more smooth surface. The studied parameters allowed producing a boron coating with the optimal thickness in order to minimize self-absorption effect in the film, thus increasing efficiency.
publishDate 2018
dc.date.evento.pt_BR.fl_str_mv January 27 - February 01, 2018
dc.date.accessioned.fl_str_mv 2018-08-08T12:22:15Z
dc.date.available.fl_str_mv 2018-08-08T12:22:15Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv http://repositorio.ipen.br/handle/123456789/29021
dc.identifier.doi.pt_BR.fl_str_mv 10.1117/12.2285896
url http://repositorio.ipen.br/handle/123456789/29021
identifier_str_mv 10.1117/12.2285896
dc.relation.ispartofseries.pt_BR.fl_str_mv SPIE Proceedings Series, 10525
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dc.format.none.fl_str_mv 105250J-1 - 105250J-7
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dc.publisher.none.fl_str_mv Society of Photo-optical Instrumentation Engineers
publisher.none.fl_str_mv Society of Photo-optical Instrumentation Engineers
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