Newhigh-count-rate detectors are required for future spallation neutron sources where large-area and high-efficiency (>50%) detectors are envisaged. In this framework, Gas Electron Multiplier (GEM) is one of the detector technologies being explored, since it features good spatial resolution (<0.5 cm) and timing properties, has excellent rate capability (MHz/mm(2)) and can cover large areas (some m(2)) at low cost. In the BAND-GEM (boron array neutron detector GEM) approach a 3D geometry for the neutron converter cathode was developed that is expected to provide an efficiency >30% in thewavelength range of interest for small angle neutron scattering instruments. A system of aluminum grids with thin walls coated with a 0.59 mu m layer of (B4C)-B-10 has been built and positioned in the first detector gap, orthogonally to the cathode. By tilting the grid system with respect to the beam, there is a significant increase of effective thickness of the borated material crossed by the neutrons. As a consequence, both interaction probability and detection efficiency are increased. This paper presents the results of the performance of the BAND-GEM detector in terms of efficiency and spatial resolution

Muraro, A., Croci, G., PERELLI CIPPO, E., Grosso, G., Höglund, C., Albani, G., et al. (2018). Performance of the high-efficiency thermal neutron BAND-GEM detector. PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS(2) [10.1093/ptep/pty005].

Performance of the high-efficiency thermal neutron BAND-GEM detector

Andrea Muraro
;
Gabriele Croci
Secondo
;
Enrico Perelli Cippo;Giorgia Albani;Marica Rebai;Marco Tardocchi;Giuseppe Gorini
2018

Abstract

Newhigh-count-rate detectors are required for future spallation neutron sources where large-area and high-efficiency (>50%) detectors are envisaged. In this framework, Gas Electron Multiplier (GEM) is one of the detector technologies being explored, since it features good spatial resolution (<0.5 cm) and timing properties, has excellent rate capability (MHz/mm(2)) and can cover large areas (some m(2)) at low cost. In the BAND-GEM (boron array neutron detector GEM) approach a 3D geometry for the neutron converter cathode was developed that is expected to provide an efficiency >30% in thewavelength range of interest for small angle neutron scattering instruments. A system of aluminum grids with thin walls coated with a 0.59 mu m layer of (B4C)-B-10 has been built and positioned in the first detector gap, orthogonally to the cathode. By tilting the grid system with respect to the beam, there is a significant increase of effective thickness of the borated material crossed by the neutrons. As a consequence, both interaction probability and detection efficiency are increased. This paper presents the results of the performance of the BAND-GEM detector in terms of efficiency and spatial resolution
Articolo in rivista - Articolo scientifico
High efficiency, high rate thermal neutron detectors
English
2018
Muraro, A., Croci, G., PERELLI CIPPO, E., Grosso, G., Höglund, C., Albani, G., et al. (2018). Performance of the high-efficiency thermal neutron BAND-GEM detector. PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS(2) [10.1093/ptep/pty005].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/207833
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