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Scattered neutron background in thermal neutron detectors
Hungarian Acad Sci, Budapest, Hungary; European Spallat Source ESS ERIC, Lund; Budapest Univ Technol & Econ, Budapest, Hungary.
European Spallat Source ESS ERIC, Lund.
Oak Ridge Natl Lab, Oak Ridge, TN USA.
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för elektronikkonstruktion. European Spallat Source ESS ERIC, Lund.ORCID-id: 0000-0003-3221-2086
Vise andre og tillknytning
2018 (engelsk)Inngår i: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 902, s. 173-183Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Inelastic neutron scattering instruments require very low background; therefore the proper shielding for suppressing the scattered neutron background, both from elastic and inelastic scattering is essential. The detailed understanding of the background scattering sources is required for effective suppression. The Multi-Grid thermal neutron detector is an Ar/CO2 gas filled detector with a (B4C)-B-10 neutron converter coated on aluminium substrates. It is a large-area detector design that will equip inelastic neutron spectrometers at the European Spallation Source (ESS). To this end a parameterised Geant4 model is built for the Multi-Grid detector. This is the first time thermal neutron scattering background sources have been modelled in a detailed simulation of detector response. The model is validated via comparison with measured data of prototypes installed on the IN6 instrument at ILL and on the CNCS instrument at SNS. The effect of scattering originating in detector components is smaller than effects originating elsewhere.

sted, utgiver, år, opplag, sider
2018. Vol. 902, s. 173-183
Emneord [en]
ESS, Neutron detector, Neutron scattering, Monte Carlo simulation, Geant4, Validation
HSV kategori
Identifikatorer
URN: urn:nbn:se:miun:diva-34522DOI: 10.1016/j.nima.2018.04.055ISI: 000442082500023Scopus ID: 2-s2.0-85049305655OAI: oai:DiVA.org:miun-34522DiVA, id: diva2:1251249
Tilgjengelig fra: 2018-09-26 Laget: 2018-09-26 Sist oppdatert: 2018-09-28bibliografisk kontrollert

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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

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