High event rate, pulse shape discrimination algorithm for CLYC

Erik B. Johnson, Chad Whitney, Sam Vogel, James F. Christian, Keith Holbert, Premkumar Chandhran

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

3 Scopus citations

Abstract

CLYC is a scintillation material that is a viable alternative to 3He for neutron detection because the shape of the scintillation emission depends on the linear energy transfer producing the event, e.g., electrons from gamma-rays versus charged ions from neutrons. Analyzing the pulse shape on an event-by-event basis discriminates the neutron events from the gamma-ray event, which is called pulse shape discrimination. The long decay time associated with the scintillation emission of CLYC can result in pulse pile-up for event rates exceeding 100 kHz. One method to address this issue is to develop digital signal processing algorithms to remove pile up, while providing gamma-neutron discrimination and gamma spectra. Research on the algorithm development using saved CLYC pulses processed offline on a personal computer with C++ code indicate that CLYC can provide pulse shape discrimination exceeding 600,000 events per second, primarily from gamma events. The algorithm digitally suppressed the decay tail, allowing for unique temporal identification of a pulse (pile-up removal). Additional filtering of the pulse is done to reduce noise, and peak-to-tail information is obtained on filtered data within a time frame less than 1 μs to provide the pulse shape discrimination.

Original languageEnglish (US)
Title of host publication2015 IEEE International Symposium on Technologies for Homeland Security, HST 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781479917372
DOIs
StatePublished - Aug 26 2015
Externally publishedYes
EventIEEE International Symposium on Technologies for Homeland Security, HST 2015 - Waltham, United States
Duration: Apr 14 2015Apr 16 2015

Other

OtherIEEE International Symposium on Technologies for Homeland Security, HST 2015
CountryUnited States
CityWaltham
Period4/14/154/16/15

Keywords

  • CLYC
  • digital signal processing
  • neutron
  • pile-up rejection
  • pulse shape discrmination

ASJC Scopus subject areas

  • Computer Science Applications
  • Safety, Risk, Reliability and Quality
  • Law

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  • Cite this

    Johnson, E. B., Whitney, C., Vogel, S., Christian, J. F., Holbert, K., & Chandhran, P. (2015). High event rate, pulse shape discrimination algorithm for CLYC. In 2015 IEEE International Symposium on Technologies for Homeland Security, HST 2015 [7225282] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/THS.2015.7225282