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Ultracold neutron detection with 6Li-doped glass scintillators

journal contribution
posted on 2023-06-09, 04:08 authored by G Ban, G Bison, K Bodek, Z Chowdhuri, P Geltenbort, Clark GriffithClark Griffith, V Hélaine, R Henneck, M Kasprzak, Y Kermaidic, K Kirch, S Komposch, P A Koss, A Kozela, J Krempel, B Lauss, T Lefort, Y Lemière, A Mtchedlishvili, M Musgrave, O Naviliat-Cuncic, F M Piegsa, E Pierre, G Pignol, G Quéméner, M Rawlik, D Ries, D Rebreyend, S Roccia, G Rogel, P Schmidt-Wellenburg, N Severijns, E Wursten, J Zejma, G Zsigmond
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.

Funding

Neutron EDM; G1558; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/M003426/1

Consolidated Grant; G0927; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/K001329/1

Magnetic Field Uniformity and Ultracold Neutron Storage Optimization for CryoEDM; G1288; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/L006472/1

History

Publication status

  • Published

File Version

  • Submitted version

Journal

European Physical Journal A: Hadrons and Nuclei

ISSN

1434-6001

Publisher

Springer

Issue

10

Volume

52

Page range

326

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Experimental Particle Physics Research Group Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2016-12-06

First Compliant Deposit (FCD) Date

2016-11-23

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