Implementation and Initial Testing of Advanced Processing and Analysis Algorithms for Correlated Neutron Counting

Technical Report · Tue Dec 01 00:00:00 EST 2015

DOI:https://doi.org/10.2172/1227253· OSTI ID:1227253

Santi, Peter Angelo ^[1]; Cutler, Theresa Elizabeth ^[1]; Favalli, Andrea ^[1]; Koehler, Katrina Elizabeth ^[1]; Henzl, Vladimir ^[1]; Henzlova, Daniela ^[1]; Parker, Robert Francis ^[1]; Croft, Stephen ^[2]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

In order to improve the accuracy and capabilities of neutron multiplicity counting, additional quantifiable information is needed in order to address the assumptions that are present in the point model. Extracting and utilizing higher order moments (Quads and Pents) from the neutron pulse train represents the most direct way of extracting additional information from the measurement data to allow for an improved determination of the physical properties of the item of interest. The extraction of higher order moments from a neutron pulse train required the development of advanced dead time correction algorithms which could correct for dead time effects in all of the measurement moments in a self-consistent manner. In addition, advanced analysis algorithms have been developed to address specific assumptions that are made within the current analysis model, namely that all neutrons are created at a single point within the item of interest, and that all neutrons that are produced within an item are created with the same energy distribution. This report will discuss the current status of implementation and initial testing of the advanced dead time correction and analysis algorithms that have been developed in an attempt to utilize higher order moments to improve the capabilities of correlated neutron measurement techniques.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 1227253
• Report Number(s): LA-UR-15-29225; TRN: US1500906
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
NEUTRONS
ALGORITHMS
DEAD TIME
ENERGY SPECTRA
IMPLEMENTATION
TESTING
CORRECTIONS
DATA ANALYSIS
DATA PROCESSING
PULSES
ACCURACY
MULTIPLICITY
NEUTRON DETECTION
CORRELATIONS