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Title: Initial Investigation of the Small Feature Detection Capability of the ORNL Fast Neutron Tomographic Imaging System

Abstract

A variety of fast neutron imaging simulations and measurements were performed to investigate the spatial resolution and small feature detection capability of a version of the Oak Ridge National Laboratory fast neutron tomographic imaging system. Two image quality indicators were examined: (1) a variety of long steel pins embedded axially in the interior of a polyethylene cylinder, and (2) a variety of short steels pins embedded radially in the surface of a polyethylene cylinder. Measurements demonstrated detectability of about 3 mm. Further data analysis may show improved detection performance and allow a more precise determination of the spatial resolution. Our current simulation code takes only partial consideration of the DT generator neutron production spot size, with neutron production effectively originating at a single point. Simulations showed that features less than 2 mm should be detectable with an improved generator. Our current ING-27 DT generator has a neutron production spot size of about 3.5 mm, which appears to be the limiting factor at present. Generators with spot sizes as small as 1 mm are commercially available. Higher-power, small–spot size associated particle generators are at the prototype stage and are expected to be commercially available soon.


Citation Formats

Wright, Michael C., Nelius, Eric W., Mihalczo, John T., Mcconchie, Seth M., and Hausladen, Paul. Initial Investigation of the Small Feature Detection Capability of the ORNL Fast Neutron Tomographic Imaging System. United States: N. p., 2018. Web. doi:10.2172/1494902.
Wright, Michael C., Nelius, Eric W., Mihalczo, John T., Mcconchie, Seth M., & Hausladen, Paul. Initial Investigation of the Small Feature Detection Capability of the ORNL Fast Neutron Tomographic Imaging System. United States. doi:10.2172/1494902.
Wright, Michael C., Nelius, Eric W., Mihalczo, John T., Mcconchie, Seth M., and Hausladen, Paul. Sun . "Initial Investigation of the Small Feature Detection Capability of the ORNL Fast Neutron Tomographic Imaging System". United States. doi:10.2172/1494902. https://www.osti.gov/servlets/purl/1494902.
@article{osti_1494902,
title = {Initial Investigation of the Small Feature Detection Capability of the ORNL Fast Neutron Tomographic Imaging System},
author = {Wright, Michael C. and Nelius, Eric W. and Mihalczo, John T. and Mcconchie, Seth M. and Hausladen, Paul},
abstractNote = {A variety of fast neutron imaging simulations and measurements were performed to investigate the spatial resolution and small feature detection capability of a version of the Oak Ridge National Laboratory fast neutron tomographic imaging system. Two image quality indicators were examined: (1) a variety of long steel pins embedded axially in the interior of a polyethylene cylinder, and (2) a variety of short steels pins embedded radially in the surface of a polyethylene cylinder. Measurements demonstrated detectability of about 3 mm. Further data analysis may show improved detection performance and allow a more precise determination of the spatial resolution. Our current simulation code takes only partial consideration of the DT generator neutron production spot size, with neutron production effectively originating at a single point. Simulations showed that features less than 2 mm should be detectable with an improved generator. Our current ING-27 DT generator has a neutron production spot size of about 3.5 mm, which appears to be the limiting factor at present. Generators with spot sizes as small as 1 mm are commercially available. Higher-power, small–spot size associated particle generators are at the prototype stage and are expected to be commercially available soon.},
doi = {10.2172/1494902},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {4}
}

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