Journal Article

FZJ-2021-00018

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Time- and energy-resolved effects in the boron-10 based multi-grid and helium-3 based thermal neutron detectors

Backis, A. (Corresponding author) ; Khaplanov, A. ; Al Jebali, R. ; Ammer, R. ; Apostolidis, I. ; Birch, J. ; Lai, C. C. ; Deen, P. P. ; Etxegarai, M. ; de Ruette, N. ; Freita Ramos, J. ; Förster, D.FZJ* ; Haettner, E. ; Hall-Wilton, R. ; Hamilton, D. ; Höglund, C. ; Kadletz, P. M. ; Kanaki, K. ; Karnickis, E. ; Kirstein, O. ; Kolya, S. ; Kraujalyte, Z. ; Laloni, A. ; Livingston, K. ; Löhman, O. ; Maulerova, V. ; Mauritzon, N. ; Müller, F.FZJ* ; Lopez Higuera, I. ; Richter, T. ; Robinson, L. ; Roth, R. ; Shetty, M. ; Taylor, J. ; Woracek, R. ; Xiong, W.

2021
IOP Publ. Bristol

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Please use a persistent id in citations: http://hdl.handle.net/2128/29770  doi:10.1088/1361-6501/abc63e

Abstract: The boron-10 based multi-grid detector is being developed as an alternative to helium-3 based neutron detectors. At the European Spallation Source, the detector will be used for time-of-flight neutron spectroscopy at cold to thermal neutron energies. The objective of this work is to investigate fine time- and energy-resolved effects of the Multi-Grid detector, down to a few µeV, while comparing it to the performance of a typical helium-3 tube. Furthermore, it is to characterize differences between the detector technologies in terms of internal scattering, as well as the time reconstruction of ~ µs short neutron pulses. The data were taken at the Helmholtz Zentrum Berlin, where the Multi-Grid detector and a helium-3 tube were installed at the ESS test beamline, V20. Using a Fermi-chopper, the neutron beam of the reactor was chopped into a few tens of µs wide pulses before reaching the detector, located a few tens of cm downstream. The data of the measurements show an agreement between the derived and calculated neutron detection efficiency curve. The data also provide fine details on the effect of internal scattering, and how it can be reduced. For the first time, the chopper resolution was comparable to the timing resolution of the Multi-Grid detector. This allowed a detailed study of time- and energy resolved effects, as well as a comparison with a typical helium-3 tube.

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Contributing Institute(s):

1. Zentralinstitut für Technologie (ZEA-1)

Research Program(s):

1. 6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4) (POF4-6G4)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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