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

Santi, Peter Angelo¹  Cutler, Theresa Elizabeth¹  Favalli, Andrea¹  Koehler, Katrina Elizabeth¹  Henzl, Vladimir¹  Henzlova, Daniela¹  Parker, Robert Francis¹  Croft, Stephen² 

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

关键词: NEUTRONS;    ALGORITHMS;    DEAD TIME;    ENERGY SPECTRA;    IMPLEMENTATION;    TESTING;    CORRECTIONS;    DATA ANALYSIS;    DATA PROCESSING;    PULSES;    ACCURACY;    MULTIPLICITY;    NEUTRON DETECTION;    CORRELATIONS;   

DOI  :  10.2172/1227253
RP-ID  :  LA-UR--15-29225
PID  :  OSTI ID: 1227253
Others  :  TRN: US1500906

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来源: SciTech Connect

【 摘 要 】

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.