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in subjects: "Cones"

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BRUTE

BRUTE is an algorithm to derive the implied boundary of a piecepart from the part's wireframe representation. BRUTE's input is an IGES file. The geometry is extracted and used to derive the edge-vertex (EV) topology. BRUTE then uses a divide-and-conquer method to derive all reasonable face-edge-vertex (FEV) topologies from the EV topology. The final step is to determine the geometry of each face by using the geometry of its edges. Any FEV topology that contains a face that is not a valid surfac… more

Date: May 1, 1982

Creator: Christensen, N.C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Top Jets at the LHC

We investigatethe reconstruction of high pT hadronically-decaying top quarksat the Large Hadron Collider. One of the main challenges in identifying energetictop quarks is that the decay products become increasingly collimated. This reducesthe efficacy of conventional reconstruction methods that exploit the topology of thetop quark decay chain. We focus on the cases where the decay products of the topquark are reconstructed as a single jet, a"top-jet." The most basic"top-tag"… more

Date: October 6, 2008

Creator: Almeida, L.G.; Lee, S.J.; Perez, G.; Sung, I. & Virzi, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Fast ignition relevant study of the flux of high intensity laser-generated electrons via a hollow cone into a laser-imploded plasma

An integrated experiment relevant to fast ignition. A Cu-doped deuterated polymer spherical shell target with an inserted hollow Au cone is imploded by a six-beam 900-J, 1-ns laser. A 10-ps, 70-J laser pulse is focused into the cone at the time of peak compression. The flux of high-energy electrons through the imploded material is determined from the yield of Cu K{sub {alpha}} fluorescence by comparison with a Monte Carlo model. The electrons are estimated to carry about 15% of the laser energy… more

Date: November 20, 2007

Creator: Key, M

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A Search for New Particles with Lifetime 10(-12) - 10(-14) sec in Interactions of Protons with Nucleons and Nuclei in Emulsion at 400-GeV/c

A stack of nuclear emulsions was irradiated by 400 Gev/c protons at FNAL. In this work a search for the short-lived particles has been carried out by a new method that allowed to detect secondary events (including the narrow ones) on short distances from the parent star. By measuring angles, momenta and ionizations of the secondary particles they could identify electrons and distinguish them from hadrons. In search for the decays of charged of particles on n{sub s} {ge} 3 charged relativistic p… more

Date: June 1, 1978

Creator: Chernyavsky, M. M.; Komar, A. A.; Orlova, G. I.; Salmanova, N. A. & Tretyakova, M. I.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

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

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: Report

Partner: UNT Libraries Government Documents Department

open access

A Study of Detonation Propagation and Diffraction with Compliant Confinement

A previous computational study of diffracting detonations with the ignition-and-growth model demonstrated that contrary to experimental observations, the computed solution did not exhibit dead zones. For a rigidly confined explosive it was found that while diffraction past a sharp corner did lead to a temporary separation of the lead shock from the reaction zone, the detonation re-established itself in due course and no pockets of unreacted material were left behind. The present investigation c… more

Date: August 13, 2007

Creator: Banks, J; Schwendeman, D; Kapila, A & Henshaw, W

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

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

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: Report

Partner: UNT Libraries Government Documents Department

open access

Understanding High Voltage Vacuum Insulators for Microsecond Pulses

High voltage insulation is one of the main areas of pulsed power research and development since the surface of an insulator exposed to vacuum can fail electrically at an applied field more than an order or magnitude below the bulk dielectric strength of the insulator. This is troublesome for applications where high voltage conditioning of the insulator and electrodes is not practical and where relatively long pulses, on the order of several microseconds, are required. Here we give a summary of … more

Date: August 15, 2007

Creator: Javedani, J. B.; Goerz, D. A.; Houck, T. L.; Lauer, E. J.; Speer, R. D.; Tully, L. K. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

On Point Designs for High Gain Fast Ignition

Fast ignition research has reached the stage where point designs are becoming crucial to the identification of key issues and the development of projects to demonstrate high gain fast ignition. The status of point designs for cone coupled electron fast ignition and some of the issues they highlight are discussed.

Date: September 27, 2007

Creator: Key, M.; Akli, K.; Beg, F.; Betti, R.; Clark, D. S.; Chen, S. N. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Fast Ignition relevant study of the flux of high intensity laser generated electrons via a hollow cone into a laser-imploded plasma

An integrated experiment relevant to fast ignition is described. A Cu doped CD spherical shell target is imploded around an inserted hollow Au cone by a six beam 600J, 1ns laser to a peak density of 4gcm{sup -3} and a diameter of 100 {micro}m. A 10 ps, 20TW laser pulse is focused into the cone at the time of peak compression. The flux of high-energy electrons through the imploded material is determined from the yield of Cu K{alpha} fluorescence by comparison with a Monte Carlo model and is esti… more

Date: October 11, 2005

Creator: Key, M.; Adam, J.; Akli, K.; Borgheshi, M.; Chen, M.; Evans, R. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Measurement of the k(T) Distribution of Particles in Jets Produced in p anti-p Collisions at s**(1/2) = 1.96-TeV

We present a measurement of the transverse momentum with respect to the jet axis (k{sub T}) of particles in jets produced in p{bar p} collisions at {radical}s = 1.96 TeV. Results are obtained for charged particles within a cone of opening angle 0.5 radians around the jet axis in events with dijet invariant masses between 66 and 737 GeV/c{sup 2}. The experimental data are compared to theoretical predictions obtained for fragmentation partons within the framework of resummed perturbative QCD usin… more

Date: November 1, 2008

Creator: Aaltonen, T.; Adelman, J.; Akimoto, T.; Alvarez Gonzalez, B.; Amerio, S.; Amidei, Dante E. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

DEFORMATION OF SCORIA CONE BY CONDUIT PRESSURIZATION

A simplified mechanical model is used to simulate the deformation of a scoria cone due to pressurization of magma in a feeder conduit. The scoria cone is modeled as consisting of a cone of stabilized scoria with an axial region of loose scoria (height h{sub 1}), all overlying a vertically oriented cylindrical conduit intruded into rhyolite tuff country rock. For our analyses, the conduit is filled with basalt magma, usually with the upper length (h{sub 2}) solidified. The style of deformation o… more

Date: August 26, 2005

Creator: Gaffney, E.S.; Damjanac, B.; Krier, D. & Valentine, G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

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

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: Article

Partner: UNT Libraries Government Documents Department

open access

DESERT PAVEMENTS AND SOILS ON BASALTIC PYROCLASTIC DEPOSITS AT LATHROP WELLS AND RED CONE VOLCANOES, SOUTHERN NEVADA ABSTRACT

Formation of desert pavement and accretionary soils are intimately linked in arid environments such as the Mojave Desert. Well-sorted fallout scoria lapilli at Lathrop Wells (75-80 ky) and Red Cone ({approx}1 Ma) volcanoes (southern Nevada) formed an excellent starting material for pavement, allowing infiltration of eolian silt and fine sand that first clogs the pore space of underlying tephra and then aggrades and develops vesicular A (Av) horizons. Variations in original pyroclast sizes provi… more

Date: August 26, 2005

Creator: Valentine, G.A. & Harrington, C.D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Measurement of the cross section for W-boson production in association with jets in ppbar collisions at s**(1/2) = 1.96-TeV

We present a measurement of the cross section for W-boson production in association with jets in p{bar p} collisions at {radical}s = 1.96 TeV. The analysis uses a data sample corresponding to an integrated luminosity of 320 pb{sup -1} collected with the CDF II detector. W bosons are identified in their electron decay channel and jets are reconstructed using a cone algorithm. For each W + {ge} n-jet sample (n = 1-4) we measure {sigma}(p{bar p} {yields} W + {ge} n-jet) x {Beta}(W {yields} e{nu}) … more

Date: November 1, 2007

Creator: Aaltonen, T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Fast Electron Generation in Cones with Ultra-Intense Laser Pulses

Experimental results from copper cones irradiated with ultra-intense laser light are presented. Spatial images and total yields of Cu K{sub {alpha}} fluorescence were measured as a function of the laser focusing properties. The fluorescence emission extends into the cone approximately 300 {micro}m from the cone tip and cannot be explained by ray tracing including cone wall absorption. In addition the total fluorescence yield from cones is an order of magnitude higher than for equivalent mass fo… more

Date: December 7, 2007

Creator: Mackinnon, A.; VanWoerkom, L.; Akli, K.; Bartal, T.; Beg, F.; Chawla, S. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Hemispheric ultra-wideband antenna.

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: Report

Partner: UNT Libraries Government Documents Department

open access

Laser-Plasma Interactions in High-Energy Density Plasmas

Laser-plasma interactions (LPI) have been studied experimentally in high-temperature, high-energy density plasmas. The studies have been performed using the Omega laser at the Laboratory for Laser Energetics (LLE), Rochester, NY. Up to 10 TW of power was incident upon reduced-scale hohlraums, distributed in three laser beam cones. The hot hohlraums fill quickly with plasma. Late in the laser pulse, most of the laser energy is deposited at the laser entrance hole, where most of the LPI takes pla… more

Date: August 24, 2005

Creator: Constantin, C. G.; Baldis, H. A.; Schneider, M. B.; Hinkel, D. E.; Langdon, A. B.; Seka, W. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Measurement of Inclusive Jet Cross Sections in Z/gamma*(->e+e-) + jets Production in ppbar Collisions at s**(1/2) = 1.96 TeV with the CDF Detector

This Ph.D. thesis presents the measurement of inclusive jet cross sections in Z/{gamma}* {yields} e{sup +}e{sup -} events using 1.7 fb{sup -1} of data collected by the upgraded CDF detector during the Run II of the Tevatron. The Midpoint cone algorithm is used to search for jets in the events after identifying the presence of a Z/{gamma}* boson through the reconstruction of its decay products. The measurements are compared to next-to-LO (NLO) pQCD predictions for events with one and two jets in… more

Date: April 1, 2008

Creator: Salto Bauza, Oriol

Item Type: Thesis or Dissertation

Partner: UNT Libraries Government Documents Department

open access

A Compact Torus Fusion Reactor Utilizing a Continuously Generated Strings of CT's. The CT String Reactor, CTSR.

A fusion reactor is described in which a moving string of mutually repelling compact toruses (alternating helicity, unidirectional Btheta) is generated by repetitive injection using a magnetized coaxial gun driven by continuous gun current with alternating poloidal field. An injected CT relaxes to a minimum magnetic energy equilibrium, moves into a compression cone, and enters a conducting cylinder where the plasma is heated to fusion-producing temperature. The CT then passes into a blanketed r… more

Date: May 30, 2007

Creator: Hartman, C W; Reisman, D B; McLean, H S & Thomas, J

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A Possible Event of Charmed Particle Decay via the (Weak) Neutral Current According to a Scheme M(c) --> e+ e- Hadrons

In a stack of nuclear emulsion irradiated by 200 Gev/c {pi}{sup -}-mesons at FNAL, we have made a search for new short-lived particles by tracing all secondary tracks from the star in a cone of 0 < 0,1 rad up to the distance of 1 mm. The sample of stars consisted of 350 {pi}{sup -} N- and 250 {pi}{sup -} A-interactions. They have found one peculiar event. Among {pi}{sup -} A-interactions there is star of type 21 + 6 + 23 p in which one secondary prong (0{sub L} = 4,6{sup o}) gives at the dis… more

Date: June 1, 1978

Creator: Chernyavsky, M. M.; Komar, A. A.; Orlova, G. I. & Tretyakova, M. I.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

21st Century Locomotive Technology: Quarterly Technical Status Report 20 DOE/AL68284-TSR20

advanced fuel injection work is summarized.

Date: January 31, 2008

Creator: Salasoo, Lembit; Primus, Roy; Pintgen, Florian; Topinka, Jennifer & Dean, Anthony

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Analysis of stress sensitivity and its influence on oil productionfrom tight reservoirs

This paper presents a study of the relationship betweenpermeability and effective stress in tight petroleum reservoirformations. Specifically, a quantitative method is developed to describethe correlation between permeability and effective stress, a method basedon the original in situ reservoir effective stress rather than ondecreased effective stress during development. The experimental resultsshow that the relationship between intrinsic permeability and effectivestress in reservoirs in genera… more

Date: August 28, 2007

Creator: Lei, Qun; Xiong, Wei; Yuan, Cui & Wu, Yu-Shu

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Nail-like targets for laser plasma interaction experiments

The interaction of ultra-high power picosecond laser pulses with solid targets is of interest both for benchmarking the results of hybrid particle in cell (PIC) codes and also for applications to re-entrant cone guided fast ignition. We describe the construction of novel targets in which copper/titanium wires are formed into 'nail-like' objects by a process of melting and micromachining, so that energy can be reliably coupled to a 24 {micro}m diameter wire. An extreme-ultraviolet image of the i… more

Date: December 18, 2007

Creator: Pasley, J.; Wei, M.; Shipton, E.; Chen, S.; Ma, T.; Beg, F. N. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department