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Filtering by: Creator Palmer, Ray Frederick Remove constraint Creator: Palmer, Ray Frederick Advisor Palmer, Todd S. Remove constraint Advisor: Palmer, Todd S.

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  • Evaluation of ²³⁵U and ²³⁸U Fast Fission Product Yields from Godiva-IV Burst Irradiation via Gamma Detection

    Creator:
    Tamashiro, Aaron S.
    Abstract:
    During the past few decades, the U.S. Department of Energy (DOE) has made significant investments to improve nuclear data libraries, as the quality of this data impacts nearly all analyses of nuclear systems. Nuclear fission product yields are one component of these libraries, and are important for the analysis of...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: Todd S. Palmer During the past few decades, the U.S. Department of Energy (DOE) has made

  • Investigation Into the Use of a Lead Slowing Down Spectrometer for Neutron Cross Section Analysis

    Creator:
    Keppen, Jackson D.
    Abstract:
    A lead slowing-down spectrometer (LSDS) was modeled in the hopes of beginning a nuclear data development campaign at Oregon State University. An LSDS can be used for neutron interrogation techniques, such as determining isotopic inventory of a sample of unknown components or determining the cross section of a sample of...
    Resource Type:
    Honors College Thesis
    Full Text:
    Spectrometer for Neutron Cross Section Analysis Abstract approved: Todd Palmer A lead slowing-down

  • Analysis of the antineutrino rate during CANDU reactor startup

    Creator:
    Matthews, Christopher
    Abstract:
    Detection systems used to monitor reactor operations are of significant interest as tools for verification of operator declarations. Current reactor site safeguards are limited to visual inspections and intrusive monitoring systems. The recent development of antineutrino detectors may soon allow real-time monitoring from an unobtrusive location. Antineutrinos are produced through...
    Resource Type:
    Masters Thesis
    Full Text:
    : _____________________________________________________________________ Todd S. Palmer Detection systems used to monitor reactor operations are of significant

  • Detection of actinides via nuclear isomer de-excitation

    Creator:
    Francy, Christopher J.
    Abstract:
    The detection of illicit weapons-grade nuclear material is a significant technical challenge receiving a great deal of attention in the nuclear community. A proposed solution is to actively bombard the material under investigation with neutrons, populating nuclear isomers in any potential fissile material. These isomers decay quickly, releasing gamma rays...
    Resource Type:
    Masters Thesis
    Full Text:
    : __________________________________________________________ Todd S. Palmer The detection of illicit weapons-grade nuclear material is a significant

  • Evaluating preconditioning options for the Jacobian-Free Newton Krylov Method applied to radiative transfer with matter coupling

    Creator:
    Myers, Nicholas T.
    Abstract:
    The objective of this thesis was to investigate the use of the Jacobian Free Newton Krylov Method (JFNK) with physics based preconditioning for solving coupled radiative transport and material energy balance. Modeling of these physics is important in inertial confinement fusion and other high energy density systems. In this thesis,...
    Resource Type:
    Masters Thesis
    Full Text:
    Coupling Abstract approved: Todd S. Palmer The objective of this thesis was to investigate the use of

  • Calculation of Pulse height distributions from deterministic transport simulations

    Creator:
    Benz, Jacob M.
    Abstract:
    In source-detector radiation transport simulations, pulse height distributions are a useful metric in assessing the effectiveness of nuclear instrumentation. In the area of spectroscopy, pulse height distributions are used to identify an unknown source. It is widely believed that pulse height distributions cannot be created using deterministic methods. This quantity...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: _____________________________________________________________________ Todd S. Palmer

  • Generation of Multigroup Multiband Cross Sections with Monte Carlo Simulations

    Creator:
    Lam, Adam Q.
    Abstract:
    This is the investigation into The generation of high-fidelity multigroup multiband cross sections from Monte Carlo neutron transport simulations. Previous methods for generating multigroup multiband (MGMB) cross sections, and multigroup cross sections, assume an approximate shape for the scalar flux. This approximate flux shape is the product of an energy-dependent...
    Resource Type:
    Masters Thesis
    Full Text:
    Multiband Cross Sections with Monte Carlo Simulations. Abstract approved: Todd S. Palmer A novel method

  • Application of a Modified Microdosimetric-Kinetic Model to Analyze Cell Killing in Determination of the Optimal Particle for Light Ion Therapy

    Creator:
    Butkus, Michael P.
    Abstract:
    Ion therapy has long been investigated as a potential modality to improve cancer treatments beyond what is currently feasible with photon irradiations. Ions offer both a physical and biological advantage over photons. The physical advantages are well understood, ions deposit their maximum dose at defined penetration depths, allowing for minimal...
    Resource Type:
    Dissertation
    Full Text:
    : ______________________________________________________ Todd S. Palmer Ion therapy has long been investigated as a potential modality to improve

  • Diffusion Accelerated Implicit Monte Carlo via Nonlinear Elimination for Thermal Radiative Transfer

    Creator:
    Lam, Adam Q.
    Abstract:
    In this dissertation, we derive and implement a new transport-diffusion hybrid algorithm for solving thermal radiative transfer (TRT) problems. Using the method of nonlinear elimination (NLEM), the TRT system of equations can be written in terms of a transport equation with the absence of scattering and a diffusion equation. The...
    Resource Type:
    Dissertation
    Full Text:
    : Todd S. Palmer In this dissertation, we derive and implement a new transport-diffusion hybrid al

  • Performance of hybrid methods for representative nonproliferationproblems

    Creator:
    Bevill, Aaron M.
    Abstract:
    Adjoint-derived weight windowing is a hybrid deterministic/Monte Carlo method to simulate radiation transport. In adjoint-derived weight windowing, a deterministic adjoint solution is used to create weight windows for a Monte Carlo simulation. The intent of this work is to identify factors that reduce the Figure of Merit (FOM) of Monte...
    Resource Type:
    Masters Thesis
    Full Text:
    Methods for Representative Nonproliferation Problems. Abstract approved: Todd S. Palmer Adjoint-derived