Timing resistive plate chambers for thermal neutron detection with 3D position sensitivity

An optimized design of a neutron detector based on timing RPCs (Resistive Plate Chambers) with boron-10 neutron converters is presented. The detector is composed of a stack of ten double gap RPCs with aluminium cathode plates coated on both sides with \(^{10}B_{4}C\). This design enables simultaneou...

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Bibliographic Details
Published in:arXiv.org 2023-03
Main Authors: Margato, L M S, Canezin, G, Morozov, A, Blanco, A, Saraiva, J, Lopes, L, Fonte, P
Format: Article
Language:English
Subjects:
Aluminum
Boron 10
Design optimization
Elastic scattering
Neutron counters
Resistive plate chambers
Thermal neutrons
Online Access:Get full text
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Summary:An optimized design of a neutron detector based on timing RPCs (Resistive Plate Chambers) with boron-10 neutron converters is presented. The detector is composed of a stack of ten double gap RPCs with aluminium cathode plates coated on both sides with \(^{10}B_{4}C\). This design enables simultaneous determination with high accuracy of both the neutron time-of-flight (down to ns resolution) and the interaction position in 3D (down to 0.25 mm resolution across and ~1 mm along the beam). It is shown that the detection efficiency can approach 60% for neutrons with \(\lambda\) = 4.7 Ȧ. A new geometry with less material budget is introduced for the signal pick-up strip arrays. The results of simulation-based optimization of the design are reported considering the trade-off between the detection efficiency, the count rate capability and the amount of elastic scattering on the detector components.
ISSN:2331-8422
DOI:10.48550/arxiv.2303.03461