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Title: Wavelength-Shifting-Fiber Scintillation Detectors for Thermal Neutron Imaging at SNS

Abstract

We have developed wavelength-Shifting-fiber Scintillator Detector (SSD) with 0.3 m2 area per module. Each module has 154 x 7 pixels and a 5 mm x 50 mm pixel size. Our goal is to design a large area neutron detector offering higher detection efficiency and higher count-rate capability for Time-Of-Flight (TOF) neutron diffraction in Spallation Neutron Source (SNS). A ZnS/6LiF scintillator combined with a novel fiber encoding scheme was used to record the neutron events. A channel read-out-card (CROC) based digital-signal processing electronics and position-determination algorithm was applied for neutron imaging. Neutron-gamma discrimination was carried out using pulse-shape discrimination (PSD). A sandwich flat-scintillator detector can have detection efficiency close to He-3 tubes (about 10 atm). A single layer flat-scintillator detector has count rate capability of 6,500 cps/cm2, which is acceptable for powder diffractometers at SNS.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1042859
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: IEEE Nuclear science Symposium and Medical Imaging Conference-2011, Valencia, Spain, 20111023, 20111023
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ALGORITHMS; DESIGN; DETECTION; DIFFRACTOMETERS; EFFICIENCY; FIBERS; NEUTRON DETECTORS; NEUTRON DIFFRACTION; NEUTRON SOURCES; NEUTRONS; PHOSPHORS; PROCESSING; SCINTILLATION COUNTERS; SPALLATION; THERMAL NEUTRONS

Citation Formats

Clonts, Lloyd G, Cooper, Ronald G, Crow, Lowell, Diawara, Yacouba, Ellis, E Darren, Funk, Loren L, Hannan, Bruce W, Hodges, Jason P, Richards, John D, Riedel, Richard A, and Wang, Cai-Lin. Wavelength-Shifting-Fiber Scintillation Detectors for Thermal Neutron Imaging at SNS. United States: N. p., 2012. Web.
Clonts, Lloyd G, Cooper, Ronald G, Crow, Lowell, Diawara, Yacouba, Ellis, E Darren, Funk, Loren L, Hannan, Bruce W, Hodges, Jason P, Richards, John D, Riedel, Richard A, & Wang, Cai-Lin. Wavelength-Shifting-Fiber Scintillation Detectors for Thermal Neutron Imaging at SNS. United States.
Clonts, Lloyd G, Cooper, Ronald G, Crow, Lowell, Diawara, Yacouba, Ellis, E Darren, Funk, Loren L, Hannan, Bruce W, Hodges, Jason P, Richards, John D, Riedel, Richard A, and Wang, Cai-Lin. Sun . "Wavelength-Shifting-Fiber Scintillation Detectors for Thermal Neutron Imaging at SNS". United States.
@article{osti_1042859,
title = {Wavelength-Shifting-Fiber Scintillation Detectors for Thermal Neutron Imaging at SNS},
author = {Clonts, Lloyd G and Cooper, Ronald G and Crow, Lowell and Diawara, Yacouba and Ellis, E Darren and Funk, Loren L and Hannan, Bruce W and Hodges, Jason P and Richards, John D and Riedel, Richard A and Wang, Cai-Lin},
abstractNote = {We have developed wavelength-Shifting-fiber Scintillator Detector (SSD) with 0.3 m2 area per module. Each module has 154 x 7 pixels and a 5 mm x 50 mm pixel size. Our goal is to design a large area neutron detector offering higher detection efficiency and higher count-rate capability for Time-Of-Flight (TOF) neutron diffraction in Spallation Neutron Source (SNS). A ZnS/6LiF scintillator combined with a novel fiber encoding scheme was used to record the neutron events. A channel read-out-card (CROC) based digital-signal processing electronics and position-determination algorithm was applied for neutron imaging. Neutron-gamma discrimination was carried out using pulse-shape discrimination (PSD). A sandwich flat-scintillator detector can have detection efficiency close to He-3 tubes (about 10 atm). A single layer flat-scintillator detector has count rate capability of 6,500 cps/cm2, which is acceptable for powder diffractometers at SNS.},
doi = {},
url = {https://www.osti.gov/biblio/1042859}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {1}
}

Conference:
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