Development of a ZnS (Ag)-Silicon Photomultiplier Fast Neutron Detector for the Neutron Hodoscope at TREAT

Marc A. Wonders, David L. Chichester, Marek Flaska

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

The Transient Reactor Test (TREAT) Facility at Idaho National Laboratory is being restored to support the mission of advanced reactor and fuel development in the United States. A key part of this restoration is the fast neutron hodoscope which images the fuel tested during extreme transient conditions. Traditionally, this testing has been done with ZnS(Ag)-based proton recoil scintillators (PRS) coupled to photomultiplier tubes (PMTs). Recently, silicon photomultipliers (SiPMs) have emerged as a new candidate to replace PMTs in this application. This work develops, tests, and evaluates a SiPM-based PRS detector for incorporation into the updated fast neutron hodoscope, also known as the Fuel Motion Monitoring System (FMMS). The primary characteristics to be optimized are the gamma rejection and neutron detection efficiency of the detector, which will be done using a pulse shape discrimination (PSD) technique. Five types of SiPMs are tested and compared using standard PSD figures of merit, and the Hamamatsu 6075 is selected as the ideal SiPM. PSD performance for the Hamamatsu 6075 SiPM with the PRS detector is also characterized as a function of temperature. Finally, the gamma rejection and neutron detection efficiency are characterized for this SiPM and benchmarked to the traditional PMT-based PRS detectors. Both light sensors exhibit excellent gamma rejection and neutron detection efficiency. However, the SiPM-based detectors exhibit a greater ability to discriminate neutrons from gammas based only on pulse height which is important in operating at high count rates. This motivates the development of a SiPM-based PRS detector in a fully self-contained assembly to test directly with TREAT or in similar environments.

Original languageEnglish (US)
Title of host publication2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728141640
DOIs
StatePublished - Oct 2019
Event2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2019 - Manchester, United Kingdom
Duration: Oct 26 2019Nov 2 2019

Publication series

Name2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2019

Conference

Conference2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2019
CountryUnited Kingdom
CityManchester
Period10/26/1911/2/19

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Radiology Nuclear Medicine and imaging
  • Nuclear and High Energy Physics

Fingerprint Dive into the research topics of 'Development of a ZnS (Ag)-Silicon Photomultiplier Fast Neutron Detector for the Neutron Hodoscope at TREAT'. Together they form a unique fingerprint.

Cite this