Ultracold neutron detection with 6Li-doped glass scintillators

Ban, G, Bison, G, Bodek, K, Chowdhuri, Z, Geltenbort, P, Griffith, W C, Hélaine, V, Henneck, R, Kasprzak, M, Kermaidic, Y, Kirch, K, Komposch, S, Koss, P A, Kozela, A, Krempel, J, Lauss, B, Lefort, T, Lemière, Y, Mtchedlishvili, A, Musgrave, M, Naviliat-Cuncic, O, Piegsa, F M, Pierre, E, Pignol, G, Quéméner, G, Rawlik, M, Ries, D, Rebreyend, D, Roccia, S, Rogel, G, Schmidt-Wellenburg, P, Severijns, N, Wursten, E, Zejma, J and Zsigmond, G (2016) Ultracold neutron detection with 6Li-doped glass scintillators. European Physical Journal A: Hadrons and Nuclei, 52 (10). p. 326. ISSN 1434-6001

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Abstract

This paper summarizes the results from measurements aiming to characterize ultracold neutron detection with 6Li-doped glass scintillators. Single GS10 or GS20 scintillators, with a thickness of 100-200μm, fulfill the ultracold neutron detection requirements with an acceptable neutron-gamma discrimination. This discrimination is clearly improved with a stack of two scintillators: a 6Li-depleted glass bonded to a 6Li-enriched glass. The technique of optical contact bonding is used between the two glasses in order to eliminate the need for optical glue or grease between them. Relative to a 3He Strelkov gas detector, the scintillator’s detection efficiency is lower for UCN energies close to the scintillator’s Fermi potential (85-100 neV), but becomes larger at higher UCN energies. Coupled to a digital data acquisition system, counting rates up to a few 105 counts/s can be handled. A detector based on such a scintillator stack arrangement was built and has been used in the neutron electric dipole moment experiment at the Paul Scherrer Institute since 2010. Its response for routine runs of the neutron electric dipole moment experiment is presented.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Experimental Particle Physics Research Group
Subjects: Q Science > QC Physics
Depositing User: Richard Chambers
Date Deposited: 06 Dec 2016 09:36
Last Modified: 07 Mar 2017 04:52
URI: http://sro.sussex.ac.uk/id/eprint/65581

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Project NameSussex Project NumberFunderFunder Ref
Consolidated GrantG0927STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/K001329/1
Neutron EDMG1558STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/M003426/1
Magnetic Field Uniformity and Ultracold Neutron Storage Optimization for CryoEDMG1288STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/L006472/1