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Design of a Large-Area Fast Neutron Directional Detector.

Description: A large-area fast-neutron double-scatter directional detector and spectrometer is being constructed using l-meter-long plastic scintillator paddles with photomultiplier tubes at both ends. The scintillators detect fast neutrons by proton recoil and also gamma rays by Compton scattering. The paddles are arranged in two parallel planes so that neutrons can be distinguished from muons and gamma rays by time of flight between the planes. The signal pulses are digitized with a time resolution of one… more
Date: October 29, 2006
Creator: Vanier, P. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Numerical Studies of Magnetohydrodynamic Activity Resulting from Inductive Transients Final Report

Description: This report describes results from numerical studies of transients in magnetically confined plasmas. The work has been performed by University of Wisconsin graduate students James Reynolds and Giovanni Cone and by the Principal Investigator through support from contract DE-FG02-02ER54687, a Junior Faculty in Plasma Science award from the DOE Office of Science. Results from the computations have added significantly to our knowledge of magnetized plasma relaxation in the reversed-field pinch (RFP… more
Date: August 29, 2005
Creator: Sovinec, Carl R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Early Stages of Pulsed-Laser Growth of Silicon Microcolumns and Microcones in Air and SF<sub>6</sub>

Description: Dense arrays of high-aspect-ratio silicon microcolumns and microcones are formed by cumulative nanosecond pulsed excimer laser irradiation of single-crystal silicon in oxidizing atmospheres such as air and SF<sub>6</sub>. Growth of such surface microstructures requires a redeposition model and also involves elements of self-organization. The shape of the microstructures, i.e. straight columns vs steeply sloping cones and connecting walls, is governed by the type and concentration of the oxidizi… more
Date: July 29, 1999
Creator: Lowndes, D. H.; Fowlkes, J. D. & Pedraza, A. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Sediment Properties: E-Area Completion Project

Description: To accommodate a future need for additional waste disposal facilities at the Savannah River Site, the Solid Waste Management Division (SWMD) designated nine additional plots for development (Kasraii 2007; SRS 2010); these plots are collectively known as the E Area Completion Project (ECP). Subsurface samples were collected from ECP plots 6, 7, 8 and 9 (Figure 1) for chemical and physical property analyses to support Performance Assessment (PA) and Special Analyses (SA) modeling. This document s… more
Date: April 29, 2011
Creator: Millings, M.; Bagwell, L.; Amidon, M. & Dixon, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hydrodynamics of Conically-Guided Fast-Ignition Targets

Description: The fast ignition (FI) concept requires the generation of a compact, dense, pure fuel mass accessible to an external ignition source. The current baseline FI target is a shell fitted with a re-entrant cone extending to near its center. Conventional direct or indirect drive collapses the shell near the tip of the cone and then an ultra-intense laser pulse focused to the inside cone tip generates high-energy electrons to ignite the dense fuel. Theoretical investigations of this concept with a mod… more
Date: September 29, 2005
Creator: Hatchett, S. P.; Clark, D.; Tabak, M.; Turner, R. E.; Stoeckel, C.; Stephens, R. B. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Internal Reflection Sensor for the Cone Penetrometer

Description: The objectives of this project are to design, assemble, test, and demonstrate a prototype Internal Reflection Sensor (IRS) for the cone penetrometer. The sensor will ultimately be deployed during site characterization with the goal of providing real-time, in situ detection of NonAqueous Phase Liquids (NAPLs) in the subsurface. In the first phase of this program, we have designed and assembled an IRS module that interfaces directly to a standard cone penetrometer system. Laboratory tests demonst… more
Date: May 29, 1998
Creator: Bello, Job
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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