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An Aerial Radiological Survey of the Yucca Mountain Project Proposed Land Withdrawal and Adjacent Areas

Description: An aerial radiological survey of the Yucca Mountain Project (YMP) proposed land withdrawal was conducted from January to April 2006, and encompassed a total area of approximately 284 square miles (73,556 hectares). The aerial radiological survey was conducted to provide a sound technical basis and rigorous statistical approach for determining the potential presence of radiological contaminants in the Yucca Mountain proposed Land withdrawal area. The survey site included land areas currently man… more
Date: July 1, 2006
Creator: Craig Lyons, Thane Hendricks
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Plan for Proposed Aquifer Hydraulic Testing and Groundwater Sampling at Everest, Kansas, in January-February 2006.

Description: On September 8-9, 2005, representatives of the Kansas Department of Health and Environment (KDHE), the Commodity Credit Corporation of the U.S. Department of Agriculture (CCC/USDA), and Argonne National Laboratory met at the KDHE's offices in Topeka to review the status of the CCC/USDA's environmental activities in Kansas. A key CCC/USDA goal for this meeting was to obtain KDHE input on the selection of possible remedial approaches to be examined as part of the Corrective Action Study (CAS) for… more
Date: January 31, 2006
Creator: LaFreniere, L. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Cone Jet-Finding Algorithm for Heavy-Ion Collisions at LHCEnergies

Description: Standard jet finding techniques used in elementary particle collisions have not been successful in the high track density of heavy-ion collisions. This paper describes a modified cone-type jet finding algorithm developed for the complex environment of heavy-ion collisions. The primary modification to the algorithm is the evaluation and subtraction of the large background energy, arising from uncorrelated soft hadrons, in each collision. A detailed analysis of the background energy and its event… more
Date: July 27, 2006
Creator: Blyth, S.-L.; Horner, M.J.; Awes, T.C.; Cormier, T.; Gray, H.M.; Klay, J.L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Hemispheric ultra-wideband antenna.

Description: This report begins with a review of reduced size ultra-wideband (UWB) antennas and the peculiar problems that arise when building a UWB antenna. It then gives a description of a new type of UWB antenna that resolves these problems. This antenna, dubbed the hemispheric conical antenna, is similar to a conventional conical antenna in that it uses the same inverted conical conductor over a ground plane, but it also uses a hemispheric dielectric fill in between the conductive cone and the ground pl… more
Date: April 1, 2006
Creator: Brocato, Robert Wesley
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dsdp5 User Guide - Software for Semidefinite Programming.

Description: DSDP implements the dual-scaling algorithm for semidefinite programming. The source code of this interior-point solver, written entirely in ANSI C, is freely available. The solver can be used as a subroutine library, as a function within the Matlab environment, or as an executable that reads and writes to files. Initiated in 1997, DSDP has developed into an efficient and robust general-purpose solver for semidefinite programming. Although the solver is written with semidefinite programming in m… more
Date: January 24, 2006
Creator: Benson, S. J.; Ye, Y. & Science, Mathematics and Computer
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preliminary numerical modeling results - cone penetrometer (CPT) tip used as an electrode

Description: Figure 1 shows the resistivity models considered in this study; log10 of the resistivity is shown. The graph on the upper left hand side shows a hypothetical resisitivity well log measured along a well in the upper layered model; 10% Gaussian noise has been added to the well log data. The lower model is identical to the upper one except for one square area located within the second deepest layer. Figure 2 shows the electrode configurations considered. The ''reference'' case (upper frame) consid… more
Date: December 19, 2006
Creator: Ramirez, A L
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High Resolution Studies of the Origins of Polyatomic Ions in Inductively Coupled Plasma-Mass Spectrometry

Description: The inductively coupled plasma (ICP) is an atmospheric pressure ionization source. Traditionally, the plasma is sampled via a sampler cone. A supersonic jet develops behind the sampler, and this region is pumped down to a pressure of approximately one Torr. A skimmer cone is located inside this zone of silence to transmit ions into the mass spectrometer. The position of the sampler and skimmer cones relative to the initial radiation and normal analytical zones of the plasma is key to optimizing… more
Date: August 9, 2006
Creator: Ferguson, Jill Wisnewski
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Inclusive jet cross-sections and dijet azimuthal decorrelations with D0

Description: We present a preliminary measurement of the inclusive jet cross-sections based on an integrated luminosity of 378 pb{sup -1} acquired with the D0 detector between 2002 and 2004 at a center of mass energy of {radical}s = 1.96 TeV and a measurement of azimuthal dijet decorrelations based on an integrated luminosity of 150 pb{sup -1}. The cross section measurements are based on an iterative cone algorithm with a cone size of R = 0.7. They are performed in two rapidity bins between 0.0 and 0.8. The… more
Date: January 1, 2006
Creator: Strohmer, Raimund
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

CCG-LCONE CT Reconstruction Code User and Programmer's Guide

Description: This document describes a Computed Tomography (CT) reconstruction code called CCG-LCONE. CCG-LCONE is used to reconstruction objects from projections acquired on a cone beam radiographic system. This document will describe in brief the theory behind parts of the code, as well as detail the structure of the code, so it will function as both a ''User's Guide and a Programmer's Guide''. The Introduction will describe CT in general and cone beam systems in particular. It will explain why CCG-LCONE … more
Date: September 27, 2006
Creator: Jackson, J A
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Inclusive jet cross section measurement at D0

Description: We present a new preliminary measurement of the inclusive jet cross section in p{bar p} collisions based on a integrated luminosity of about 0.8 fb{sup -1}. The data were acquired using the D0 detector between 2002 and 2005. Jets are reconstructed using an iterative cone algorithm with radius R{sub cone} = 0.7. The inclusive jet cross section is presented as a function of transverse jet momentum and rapidity. Predictions from perturbative QCD in next-to-leading order, plus threshold corrections… more
Date: September 1, 2006
Creator: Voutilainen, M. & Phys., /Nebraska U. /Helsinki Inst. of
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Eruptive and Geomorphic Processes at the Lathrop Wells Scoria Cone

Description: The {approx}80 ka Lathrop Wells volcano (southern Nevada, U.S.A.) preserves evidence for a range of explosive processes and emplacement mechanisms of pyroclastic deposits and lava fields in a small-volume basaltic center. Early cone building by Strombolian bursts was accompanied by development of a fan-like lava field reaching {approx}800 m distance from the cone, built upon a gently sloping surface. Lava flows carried rafts of cone deposits, which provide indirect evidence for cone facies in l… more
Date: August 3, 2006
Creator: Valentine, G.; Krier, D.J.; Perry, F.V. & Heiken, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hard X-ray Imaging for Measuring Laser Absorption Spatial Profiles on the National Ignition Facility

Description: Hard x-ray (''Thin wall'') imaging will be employed on the National Ignition Facility (NIF) to spatially locate laser beam energy deposition regions on the hohlraum walls in indirect drive Inertial Confinement Fusion (ICF) experiments, relevant for ICF symmetry tuning. Based on time resolved imaging of the hard x-ray emission of the laser spots, this method will be used to infer hohlraum wall motion due to x-ray and laser ablation and any beam refraction caused by plasma density gradients. In o… more
Date: April 25, 2006
Creator: Dewald, E L; Jones, O S; Landen, O L; Suter, L; Amendt, P; Turner, R E et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Modeling Temporal-Spatial Earthquake and Volcano Clustering at Yucca Mountain, Nevada

Description: The proposed national high-level nuclear repository at Yucca Mountain is close to Quaternary faults and cinder cones. The frequency of these events is low, with indications of spatial and temporal clustering, making probabilistic assessments difficult. In an effort to identify the most likely intrusion sites, we based a 3D finite element model on the expectation that faulting and basalt intrusions are primarily sensitive to the magnitude and orientation of the least principal stress in extensio… more
Date: May 31, 2006
Creator: Parsons, T.; Thompson, G.A. & Cogbill, A.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ideal Laser Beam Propagation through high temperature ignition hohlraum plasmas

Description: We demonstrate that a blue (3{omega}, 351 nm) laser beam with an intensity of 2 x 10{sup 15} W-cm{sup -2} propagates within the original beam cone through a 2-mm long, T{sub e}=3.5 keV high density (n{sub e} = 5 x 10{sup 20} cm{sup -3}) plasma. The beam produced less than 1% total backscatter; the resulting transmission is greater than 90%. Scaling of the electron temperature in the plasma shows that the plasma becomes transparent for uniform electron temperatures above 3 keV. These results are… more
Date: September 20, 2006
Creator: Froula, D H; Divol, L; Meezan, N; Dixit, S; Moody, J D; Pollock, B B et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

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
open access

Geology of the Yucca Mountain Region, Chapter in Stuckless, J.S., ED., Yucca Mountain, Nevada - A Proposed Geologic Repository for High-Level Radioactive Waste

Description: Yucca Mountain has been proposed as the site for the Nation's first geologic repository for high-level radioactive waste. This chapter provides the geologic framework for the Yucca Mountain region. The regional geologic units range in age from late Precambrian through Holocene, and these are described briefly. Yucca Mountain is composed dominantly of pyroclastic units that range in age from 11.4 to 15.2 Ma. The proposed repository would be constructed within the Topopah Spring Tuff, which is th… more
Date: September 25, 2006
Creator: Stuckless, J.S. & O'Leary, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Studies of electron and proton isochoric heating for fast ignition

Description: Isochoric heating of inertially confined fusion plasmas by laser driven MeV electrons or protons is an area of great topical interest in the inertial confinement fusion community, particularly with respect to the fast ignition (FI) proposal to use this technique to initiate burn in a fusion capsule. Experiments designed to investigate electron isochoric heating have measured heating in two limiting cases of interest to fast ignition, small planar foils and hollow cones. Data from Cu K{alpha} fl… more
Date: October 2, 2006
Creator: Mackinnon, A.; Key, M.; Akli, K.; Beg, F.; Clarke, R.; Clarke, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Use of a near back-scattering imaging system on the National Ignition Facility

Description: A near back-scattering imaging diagnostic system has been implemented, qualified and fielded on the first quad of beams on the National Ignition Facility. This diagnostic images diffusing scatter plates, placed around the final focus lenses on the NIF target chamber, to quantitatively measure the fraction of light back-scattered outside of the incident cone of the focusing optics. The imaging system consists of a wide-angle lens coupled to a gated CCD camera, providing 3mm resolution over a 2m … more
Date: May 1, 2006
Creator: Mackinnon, A. J.; Niemann, C.; Piston, K.; Holtmeier, G.; McCarville, T. J.; Jones, G. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Measurement of b-quark Jet Shapes at CDF

Description: The main topic of this thesis is the measurement of b-quark jet shapes at CDF. CDF is an experiment located at Fermilab, in the United States, which studies proton-antiproton collisions at a center of mass energy of 1.96TeV. To reach this energy, the particles are accelerated using the Tevatron accelerator which is currently the highest energy collider in operation. The data used for this analysis were taken between February 2002 and September 2004 and represent an integrated luminosity of abou… more
Date: March 1, 2006
Creator: Lister, Alison
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

A Cone Jet-Finding Algorithm for Heavy Ion Collisions at LHC Energies

Description: Standard jet finding techniques used in elementary particle collisions have not been successful in the high track density of heavy-ion collisions. This paper describes a modified cone-type jet finding algorithm developed for the complex environment of heavy-ion collisions. The primary modification to the algorithm is the evaluation and subtraction of the large background energy, arising from uncorrelated soft hadrons, in each collision. A detailed analysis of the background energy and its event… more
Date: September 15, 2006
Creator: Blyth, S; Horner, M J; Awes, T; Cormier, T; Gray, H; Klay, J L et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Analysis Strategy of Powder Diffraction Data with 2-D Detector

Description: To gain a clearer understanding of orientation and grain deformation of crystalline materials, x-ray powder diffraction has played an integral role in extracting three-dimensional structural information from one-dimensional diffraction patterns. Powder diffraction models identical geometry to the intersection of a normal right cone with a plane. The purpose of this paper is to develop a general expression defining the conic sections based on the geometry of a powder diffraction experiment. Appl… more
Date: January 25, 2006
Creator: Kumar, Abhik & /SLAC, SSRL
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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