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


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


Mr Kevin Pritchard (NCNR)


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


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

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