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Master's Dissertation
DOI
https://doi.org/10.11606/D.85.2016.tde-06052016-074255
Document
Author
Full name
Roberto Mauro Schoueri
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2016
Supervisor
Committee
Pugliesi, Reynaldo (President)
Carbonari, Artur Wilson
Moraes, Marco Antonio Proença Vieira de
Title in Portuguese
Projeto e implementação do equipamento para tomografia com nêutrons do IPEN-CNEN/SP
Keywords in Portuguese
imageamento com nêutrons
nêutrons
tomografia com nêutrons
Abstract in Portuguese
Na presente dissertação, foi desenvolvido um equipamento para tomografia com nêutrons que está operacional e instalado no canal de irradiação 14 do Reator Nuclear de Pesquisas IEA-R1 do IPEN-CNEN/SP. As imagens apresentadas neste trabalho, são de objetos que foram selecionados de modo a realçarem uma das principais aplicações da técnica, que é o estudo de materiais hidrogenados mesmo se envoltos por espessa camada de alguns metais. Neste equipamento, uma tomografia completa pode ser obtida em 400 s, com uma resolução espacial máxima de 205 μm. Estas características são comparáveis às dos equipamentos mais desenvolvidos em operação em outros países, e propiciam imagens com qualidade suficiente para que sejam realizadas análises tanto qualitativas quanto quantitativas dos objetos inspecionados. A implementação da técnica da tomografia com nêutrons abre a possibilidade de novas linhas de pesquisa, pois disponibiliza uma nova ferramenta para inspeção de objetos, que fornece uma visão da sua estrutura interna, que nem sempre é possível por métodos de imageamento bidimensional.
Title in English
Design and development of a neutron tomography facility at the IPEN-CNEN/SP
Keywords in English
neutron
neutron imaging
neutron tomography
Abstract in English
In the work reported in this dissertation, a facility for neutron tomography was developed and installed at the irradiation channel #14 of the IEA-R1 nuclear research reactor of IPEN-CNEN/SP. Several selected objects were inspected, and the obtained images demonstrate the main characteristic of the present technique that is its capability to visualize hydrogenous rich substances. In such facility, a tomography can be obtained in 400 s with a spatial resolution of 205 μm, and the obtained images have sufficient quality to allow qualitative and quantitative analysis. These characteristics are very similar to the ones of the top facilities around the world, and the quality of the provided images are sufficient to allow qualitative and quantitative analysis of the inspected object. The implementation of the neutron tomography technique opens up the possibility of new research as it provides a new tool for inspection of objects, which provides a view of its internal structure, which is not always possible for two-dimensional imaging methods.
 
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Publishing Date
2016-05-06
 
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