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dc.contributor.advisorKing, Jeffrey C.
dc.contributor.authorMorgan, Sarah
dc.date.accessioned2007-01-03T04:21:44Z
dc.date.accessioned2022-02-03T11:53:11Z
dc.date.available2007-01-03T04:21:44Z
dc.date.available2022-02-03T11:53:11Z
dc.date.issued2012
dc.date.submitted2012
dc.identifierT 7135
dc.identifier.urihttps://hdl.handle.net/11124/76838
dc.description2012 Fall.
dc.descriptionIncludes color illustrations.
dc.descriptionIncludes bibliographical references (pages 60-62).
dc.description.abstractThe quality of a neutron imaging beam directly impacts the quality of radiographic images produced using that beam. Fully characterizing a neutron beam, including determination of the beam's effective length-to-diameter ratio, neutron flux profile, energy spectrum, image quality, and beam divergence, is vital for producing quality radiographic images. This thesis characterized the east neutron imaging beamline at the Idaho National Laboratory Neutron Radiography Reactor (NRAD). The experiments which measured the beam's effective length-to-diameter ratio and image quality are based on American Society for Testing and Materials (ASTM) standards. An analysis of the image produced by a calibrated phantom measured the beam divergence. The energy spectrum measurements consist of a series of foil irradiations using a selection of activation foils, compared to the results produced by a Monte Carlo n-Particle (MCNP) model of the beamline. Improvement of the existing NRAD MCNP beamline model includes validation of the model's energy spectrum and the development of enhanced image simulation methods. The image simulation methods predict the radiographic image of an object based on the foil reaction rate data obtained by placing a model of the object in front of the image plane in an MCNP beamline model.
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.relation.ispartof2010-2019 - Mines Theses & Dissertations
dc.rightsCopyright of the original work is retained by the author.
dc.subjectbeam characterization
dc.subjectradiography simulation
dc.subjectNRAD
dc.subjectneutron radiography
dc.subjectcharacteristic curve
dc.subject.lcshNeutron radiography
dc.subject.lcshBeam dynamics
dc.subject.lcshImaging systems in chemistry
dc.subject.lcshIdaho National Laboratory
dc.titleBeam characterization at the neutron radiography reactor
dc.typeText
dc.contributor.committeememberGreife, Uwe
dc.contributor.committeememberAhrens, Cory
dc.contributor.committeememberPope, Chad L.
thesis.degree.nameMaster of Science (M.S.)
thesis.degree.levelMasters
thesis.degree.disciplineMetallurgical and Materials Engineering
thesis.degree.grantorColorado School of Mines


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