Towards position sensitive thermal neutron detection based in multilayer 10B converters
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2017
Autores IPEN
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60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS
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One of the most relevant issues in neutron detection is the search for alternatives
to 3He as neutron converter. Its high absorption cross section for thermal neutrons
used to make it the preferred absorber to build large area thermal neutron detectors.
Its current unavailability triggered an intense search to find alternatives like gaseous
detectors coated with 10B for neutron conversion. Such element is found in the solid
state at NPT presenting an additional challenge regarding its deposition on surfaces
with an optimum thickness. This is a critical parameter of the detector, since issues
such as the self-absorption of the products of the nuclear reaction when the films
are too thick can limit the detection efficiency of the final detector.
The use of many layers is an interesting solution to overcome these issues. This
has been tried in several geometries, such as Multi-grid, Inclined detector, Jalousie
and Cascade. In this presentation, a solution based in the Cascade concept where
several thin boron layers are used, will be presented, using a cost effective Micropattern
Gaseous Detector, the Thick-Gas Electron Multiplier (Thick-GEM), as neutron
converter and electron transporter, together with a standard GEM-based charge amplification
stage.
Preliminary results obtained with a first prototype mounted at IPEN’s research
reactor, using 10B4C neutron converters produced in the deposition lab of the European
Spallation Source will be shown and further developments towards position
sensitive detection both for beam monitors and for high efficiency neutron detectors
will be discussed.
Como referenciar
LUZ, H.N. da; SOUZA, F.A.; SERRA FILHO, L.A.; MORALLES, M.; BREGANT, M.; CARLIN, N.; HOGLUND, C.; MUNHOZ, M.G.; SCHMIDT, S.; SUAIDE, A.A.P.; SVENSSON, P.O. Towards position sensitive thermal neutron detection based in multilayer 10B converters. In: 60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS, November 28 - December 01, 2017, São Paulo, SP. Abstract... São Paulo, SP: Instituto de Pesquisas Energéticas e Nucleares, 2017. p. 13-13. Disponível em: http://repositorio.ipen.br/handle/123456789/28705. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.