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Title: A new method to reduce the statistical and systematic uncertainty of chance coincidence backgrounds measured with waveform digitizers

Abstract

We present a new method for measuring chance-coincidence backgrounds during the collection of coincidence data. The method relies on acquiring data with near-zero dead time, which is now realistic due to the increasing deployment of flash electronic-digitizer (waveform digitizer) techniques. An experiment designed to use this new method is capable of acquiring more coincidence data, and a much reduced statistical fluctuation of the measured background. A statistical analysis is presented, and us ed to derive a figure of merit for the new method. Factors of four improvement over other analyses are realistic. The technique is illustrated with preliminary data taken as part of a program to make new measurements of the prompt fission neutron spectra at Los Alamo s Neutron Science Center. In conclusion, it is expected that the these measurements will occur in a regime where the maximum figure of merit will be exploited

Authors:
 [1]
+ Show Author Affiliations
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1334114
Report Number(s):
LA-UR-15-23405
Journal ID: ISSN 0168-9002
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 805; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Chance coincidence background; Waveform digitizer; Statistical uncertainty; Systematic uncertainty

Citation Formats

O'Donnell, John M. A new method to reduce the statistical and systematic uncertainty of chance coincidence backgrounds measured with waveform digitizers. United States: N. p., 2015. Web. doi:10.1016/j.nima.2015.07.044.
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O'Donnell, John M. A new method to reduce the statistical and systematic uncertainty of chance coincidence backgrounds measured with waveform digitizers. United States. https://doi.org/10.1016/j.nima.2015.07.044
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O'Donnell, John M. Tue . "A new method to reduce the statistical and systematic uncertainty of chance coincidence backgrounds measured with waveform digitizers". United States. https://doi.org/10.1016/j.nima.2015.07.044. https://www.osti.gov/servlets/purl/1334114.
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@article{osti_1334114,
title = {A new method to reduce the statistical and systematic uncertainty of chance coincidence backgrounds measured with waveform digitizers},
author = {O'Donnell, John M.},
abstractNote = {We present a new method for measuring chance-coincidence backgrounds during the collection of coincidence data. The method relies on acquiring data with near-zero dead time, which is now realistic due to the increasing deployment of flash electronic-digitizer (waveform digitizer) techniques. An experiment designed to use this new method is capable of acquiring more coincidence data, and a much reduced statistical fluctuation of the measured background. A statistical analysis is presented, and us ed to derive a figure of merit for the new method. Factors of four improvement over other analyses are realistic. The technique is illustrated with preliminary data taken as part of a program to make new measurements of the prompt fission neutron spectra at Los Alamo s Neutron Science Center. In conclusion, it is expected that the these measurements will occur in a regime where the maximum figure of merit will be exploited},
doi = {10.1016/j.nima.2015.07.044},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = ,
volume = 805,
place = {United States},
year = {Tue Jun 30 00:00:00 EDT 2015},
month = {Tue Jun 30 00:00:00 EDT 2015}
}
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https://doi.org/10.1016/j.nima.2015.07.044
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Works referenced in this record:

The Prompt Fission Neutron Spectrum (PFNS) Measurement Program at LANSCE
journal, May 2014

The Los Alamos Neutron Science Center
journal, June 2006

  • Lisowski, Paul W.; Schoenberg, Kurt F.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 562, Issue 2
  • DOI: 10.1016/j.nima.2006.02.178

Li-glass detector response study with a 252Cf source for low-energy prompt fission neutrons
journal, March 2013

  • Lee, H. Y.; Taddeucci, T. N.; Haight, R. C.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 703
  • DOI: 10.1016/j.nima.2012.10.137

Neutron-induced 235 U fission spectrum measurements using liquid organic scintillation detectors
journal, December 2012

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    Works referencing / citing this record:

    Measurements of the Prompt Fission Neutron Spectrum at LANSCE: The Chi-Nu Experiment
    journal, January 2018

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