Jun 5 – 10, 2016
Padova, Italy
Europe/Rome timezone

Signal Processing Scheme for a Low Cost LiF:ZnS(Ag) Neutron Detector with Silicon Photomultiplier

Jun 7, 2016, 3:00 PM
1h 30m
Centro Congressi (Padova)

Centro Congressi

Padova

Poster presentation Real Time System Architectures and Intelligent Signal Processing Poster session 1

Speaker

Mr Kevin Pritchard (NCNR)

Description

The NIST Center for Neutron Research is finalizing the design of a novel scintillating neutron detector for its CANDOR neutron scattering instrument. The detectors in the chromatic analyzer must be extremely thin (~1.5 mm) and highly efficient (~90% sensitivity for 3.3 meV neutrons. To that end the detectors consist of 6LiF:ZnS(Ag) plastic scintillator in which wavelength shifting (WLS) fibers have been embedded. Scintillation light collected in the WLS fibers is read out using a silicon photomultiplier (SiPM). The signal from the SiPM is digitized and processed by a field programmable gate array using a pulse shape discrimination algorithm. Discriminating neutron capture events from other phenomena presents a number of challenges for both raw sensitivity and count rate. We describe our efforts to cope with these issues. At the present time the detectors exhibit a neutron sensitivity of ~90% for 3.3 meV neutrons with a gamma rejection ratio of ~10E-7 at count rates exceeding 10000 counts per second.

Primary author

Co-authors

Dr Alon Osovizky (NCNR, Rotem Industries Ltd.) Dr Charles Majkrzak (NCNR) Mr Jeff Ziegler (NCNR) Dr Nicholas Maliszewskyj (NCNR) Mr Peter Tsai (NCNR)

Presentation materials

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