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Performance of the high-efficiency thermal neutron BAND-GEM detector
Assoc EURATOM ENEA CNR, Milan, Italy.
Assoc EURATOM ENEA CNR, Milan, Italy; Univ Milano Bicocca, Milan, Italy; Ist Nazl Fis Nucl, Sez Milano Bicocca, Milan, Italy.
Assoc EURATOM ENEA CNR, Milan, Italy.
Assoc EURATOM ENEA CNR, Milan, Italy.
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2018 (English)In: Progress in Medicinal Chemistry, ISSN 0079-6468, E-ISSN 2050-3911, no 2, article id 023H01Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2018. no 2, article id 023H01
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
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URN: urn:nbn:se:miun:diva-33395DOI: 10.1093/ptep/pty005ISI: 000427011100013OAI: oai:DiVA.org:miun-33395DiVA, id: diva2:1194485
Available from: 2018-04-03 Created: 2018-04-03 Last updated: 2018-04-03Bibliographically approved

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Hall-Wilton, Richard

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