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dc.contributor.advisorPrelas, Mark Antonio, 1953-en_US
dc.contributor.authorLukosi, Eric
dc.date.issued2012
dc.date.submitted2012 Springen_US
dc.descriptionTitle from PDF of title page (University of Missouri--Columbia, viewed on August 29, 2012).en_US
dc.descriptionThe entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file.en_US
dc.descriptionDissertation advisor: Dr. Mark Prelasen_US
dc.descriptionIncludes bibliographical references.en_US
dc.descriptionVita.en_US
dc.descriptionPh.D. University of Missouri--Columbia 2012en_US
dc.descriptionDissertations, Academic -- University of Missouri--Columbia -- Nuclear engineeringen_US
dc.description"May 2012"en_US
dc.description.abstractIn this work a novel technique of multiplexing diamond is presented where electronic grade diamond plates are connected electrically in series and in parallel to increase the overall detection efficiency of diamond-based neutron detection systems. Theoretical results in MCNPX indicate that further development in this software is required to accurately predict the response of diamond-based neutron spectrometers. However, the results accurately indicate that an equivalent diamond plate 1cm thick only lowers the energy resolution of the 12C(n,αo)9Be peak from a 14.1 MeV interrogating neutron by a factor of two compared to a single diamond plate 0.5mm thick while increasing the detection efficiency from 1.34 percent for a single diamond plate to 25.4 percent. Further, the number of secondary neutron interactions is approximately 5.3 percent for a 1cm thick diamond plate. In addition, photons can interfere with lower energy neutron signals when multiplexing is used, especially at low photon energies, although the full energy peak still does not dominantly present itself in the pulse height spectrum for multiplexed arrays approaching 1cm with respect to the incident neutron vector. Experimental results indicate that series multiplexing is not capable for use as a means of increasing the active detection volume because of the interaction of the diamond plates in series with each other, where severe signal degradation is seen due to the equal impedances of the single crystal diamond plates. However, parallel multiplexing is shown to have great promise, although there are limitations to this technique due to the large capacitance at the preamplifier input for a large parallel multiplexed array. Still, the latter multiplexing technique is shown here to be capable of producing the largest diamond detection medium in a single detector with spectroscopic capabilities reported to date.en_US
dc.format.extentxii, 141 pagesen_US
dc.identifier.otherLukosiE-040412-D611
dc.identifier.urihttp://hdl.handle.net/10355/15084
dc.publisherUniversity of Missouri--Columbiaen_US
dc.relation.ispartof2012 Freely available dissertations (MU)en_US
dc.relation.ispartofcommunityUniversity of Missouri-Columbia. Graduate School. Theses and Dissertations. Dissertations. 2012 Dissertations
dc.subjectneutron detectionen_US
dc.subjectdetection efficiencyen_US
dc.subjectmultiplexingen_US
dc.subjectspectroscopic capabilitiesen_US
dc.titleTheoretical and experimental investigations in characterizing and developing multiplexed diamond-based neutron spectrometersen_US
dc.typeThesisen_US
thesis.degree.disciplineNuclear engineeringen_US
thesis.degree.disciplineNuclear engineeringeng
thesis.degree.grantorUniversity of Missouri--Columbiaen_US
thesis.degree.levelDoctoralen_US
thesis.degree.namePh. D.en_US


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