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TRADITIONAL AND DIGITAL AUTORADIOGRAPHY TECHNIQUES: A COMPARISON STUDY

Description: This report fulfills the FY 2006 Enhanced Surveillance Campaign Level 3 milestones for Task TSR 11.1 as defined in the execution plan [1, 2]. The purpose of this task is to reduce the cycle time necessary to complete analytical evaluations required for surveillance of reservoirs. The development of the digital autoradiography system supports this task. The digital autoradiography system is currently operational and ready for implementation in reservoir surveillance performed in the Materials Te… more
Date: August 29, 2006
Creator: Gibbs, K & Carol Kestin, C
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Hot dense matter creation in short-pulse laser interaction with tamped foils

Description: The possibility of producing hot dense matter has important applications for the understanding of transport processes in inertial confinement fusion (ICF) [1] and laboratory astrophysics experiments [2]. While the success of ICF requires the correct solution of a complex interaction between laser coupling, equation-of-state, and particle transport problems, the possibility of experimentally recreating conditions found during the ignition phase in a simplified geometry is extremely appealing. In… more
Date: August 15, 2006
Creator: Chen, S.; Pasley, J.; Beg, F.; Gregori, G.; Evans, R. G.; Notley, M. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Non-BPS Black Hole Attractor Equation

Description: We study the attractor mechanism for extremal non-BPS black holes with an infinite throat near horizon geometry, developing, as we do so, a physical argument as to why such a mechanism does not exist in non-extremal cases. We present a detailed derivation of the non-supersymmetric attractor equation. This equation defines the stabilization of moduli near the black hole horizon: the fixed moduli take values specified by electric and magnetic charges corresponding to the fluxes in a Calabi Yau co… more
Date: February 8, 2006
Creator: Kollosh, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Np Incorporation into Uranyl Alteration Phases: A Quantum Mechanical Approach

Description: Neptunium is a major contributor to the long-term radioactivity in a geologic repository for spent nuclear fuel (SNF) due to its long half-life (2.1 million years). The mobility of Np may be decreased by incorporation into the U{sup 6+} phases that form during the corrosion of SNF. The ionic radii of Np (0.089nm) and U (0.087nm) are similar, as is their chemistry. Experimental studies have shown Np can be incorporated into uranyl phases at concentrations of {approx} 100 ppm. The low concentrati… more
Date: September 5, 2006
Creator: Shuller, L. C.; Ewing, R. C. & Becker, U.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Study of Vacuum Insulator Flashover for Pulse Lengths of Multi-Microseconds

Description: We are studying the flashover of vacuum insulators for applications where high voltage conditioning of the insulator and electrodes is not practical and for pulse lengths on the order of several microseconds. The study is centered about experiments performed with a 100-kV, 10-ms pulsed power system and supported by a combination of theoretical and computational modeling. The base line geometry is a cylindrically symmetric, +45{sup o} insulator between flat electrodes. In the experiments, flasho… more
Date: July 31, 2006
Creator: Houck, T. L.; Goerz, D. A.; Javedani, J. B.; Lauer, E. J.; Tully, L. K. & Vogtlin, G. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Quantum Monte-Carlo Study of Electron Correlation in Heterostructure Quantum Dots

Description: The goal of this project is to study electron correlation in a confined geometry (quantum dots) within the two-dimensional quantum well in the sandwiches of two semiconductor materials. For these systems one is able to tune the electronic properties by controlling the size and the electron number, creating tremendous potential for novel applications. Much effort in this emerging field has been devoted to producing entangled states that are required for quantum information processing. At the sam… more
Date: November 12, 2006
Creator: Chou, Mei-Yin
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Criticality Potential of Waste Packages Containing DOE SNF Affected by Igneous Intrusion

Description: The Department of Energy (DOE) is currently preparing an application to submit to the U.S. Nuclear Regulatory Commission for a construction authorization for a monitored geologic repository. The repository will contain spent nuclear fuel (SNF) and defense high-level waste (DHLW) in waste packages placed in underground tunnels, or drifts. The primary objective of this paper is to perform a criticality analysis for waste packages containing DOE SNF affected by a disruptive igneous intrusion event… more
Date: February 7, 2006
Creator: Kimball, D. S. & Sanders, C. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Neutron Scattering Cross Sections for Natural Carbon in the Energy Range 2-133 keV

Description: Natural carbon is well known as reactor structure material and at the same time as one of the most important neutron scattering standards, especially at energies less than 2 MeV, where the neutron total and neutron scattering cross sections are essentially identical. The best neutron total cross section experimental data for natural carbon in the range 1-500 keV have uncertainties of 1-4%. However, the difference between these data and those based on R-matrix analysis and used in the ENDF libra… more
Date: June 14, 2006
Creator: Gritzay, Olena; Gnidak, Mykola; Kolotyi, Volodymyr; Korol, Oleksandr; Razbudey, Volodymyr; Venedyktov, Vitalij et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Electromagnetic Confined Plasma Target for Interaction Studies with Intense Laser Fields

Description: The paper describes a novel application of an electron beam ion trap as a plasma target facility for intense laser-plasma interaction studies. The low density plasma target ({approx}10{sup 13}/cm{sup 3}) is confined in a mobile cryogenic electromagnetic charged particle trap, with the magnetic confinement field of 1-3T maintained by a superconducting magnet. Ion plasmas for a large variety of ion species and charge states are produced and maintained within the magnetic field and the space charg… more
Date: August 9, 2006
Creator: Zielbauer, B.; Ursescu, U.; Trotsenko, S.; Spillmann, U.; Schuch, R.; Stohlker, T. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Multi-Grained Level of Detail for Rendering Complex Meshes Using a Hierarchical Seamless Texture Atlas

Description: Previous algorithms for view-dependent level of detail provide local mesh refinements either at the finest granularity or at a fixed, coarse granularity. The former provides triangle-level adaptation, often at the expense of heavy CPU usage and low triangle rendering throughput; the latter improves CPU usage and rendering throughput by operating on groups of triangles. We present a new multiresolution hierarchy and associated algorithms that provide adaptive granularity. This multi-grained hier… more
Date: November 6, 2006
Creator: Niski, Krzysztof; Purnomo, Budirijanto & Cohen, Jonathan
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A Proof-of-Principal Experiment for a High-Power Target System

Description: The MERIT experiment, to be run at CERN in 2007, is a proof-of-principle test for a target system that converts a 4-MW proton beam into a high-intensity muon beam for either a neutrino factory complex or a muon collider. The target system is based on a free mercury jet that intercepts an intense proton beam inside a 15-T solenoidal magnetic field. A muon collider or neutrino factory requires intense beams of muons, which are obtained from the decay of pions. Pion production by a proton beam is … more
Date: June 26, 2006
Creator: Kirk, H. G.; Samulyak, R.; Simos, N.; Tsang, T.; Efthymiopoulos, I.; Fabich, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Understanding the Dehumidification Performance of Air-Conditioning Equipment at Part-Load Conditions

Description: Air conditioner cooling coils typically provide both sensible cooling and moisture removal. Data from a limited number of field studies (Khattar et al. 1985; Henderson and Rengarajan 1996; Henderson 1998) have demonstrated that the moisture removal capacity of a cooling coil degrades at part-load conditions--especially when the supply fan operates continuously while the cooling coil cycles on and off. Degradation occurs because moisture that condenses on the coil surfaces during the cooling cyc… more
Date: January 1, 2006
Creator: Shirey, Don B., III; Henderson, Hugh I., Jr. & Raustad, Richard A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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X-ray Digital Radiography and Computed Tomography of ICF and HEDP Materials, Subassemblies and Targets

Description: Inertial confinement fusion (ICF) and high energy density physics (HEDP) research are being conducted at large laser facilities, such as the University of Rochester's Laboratory for Laser Energetics OMEGA facility and the Lawrence Livermore National Laboratory's (LLNL) National Ignition Facility (NIF). At such facilities, millimeter-sized targets with micrometer structures are studied in a variety of hydrodynamic, radiation transport, equation-of-state, inertial confinement fusion and high-ener… more
Date: May 31, 2006
Creator: Brown, W. D. & Martz, H. E., Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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