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in subjects: "Wires"

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Assessment of the non-destructive nature of PASD on wire insulation integrity.

The potential of a new cable diagnostic known as Pulse-Arrested Spark Discharge technique (PASD) is being studied. Previous reports have documented the capability of the technique to locate cable failures using a short high voltage pulse. This report will investigate the impact of PASD on the sample under test. In this report, two different energy deposition experiments are discussed. These experiments include the PASD pulse ({approx}6 mJ) and a high energy discharge ({approx}600 mJ) produced f… more

Date: September 1, 2003

Creator: Lockner, Thomas Ramsbeck; Peña, Gary Edward; Schneider, Larry X.; Higgins, Matthew B. & Glover, Steven Frank

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Composite wire plasma formation and evolution

The detailed understanding of the formation and evolution of plasma from rapidly heated metallic wires is a long-standing challenge in the field of plasma physics and in exploding wire engineering. This physical process is made even more complicated if the wire material is composed of a number of individual layers. The authors have successfully developed both optical and x-ray backlighting diagnostics. In particular, the x-ray backlighting technique has demonstrated the capability for quantitat… more

Date: January 1, 2000

Creator: Spielman, Rick B.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Mechanical behavior of ultrahigh strength ultrahigh carbon steel wire and rod

Ultrahigh-carbon steels (UHCSS) can achieve very high strengths in wire or rod form. These high strengths result from the mechanical work introduced during wire and rod processing. These strengths have been observed to increase with carbon content. In wire form, tensile strengths approaching 6000 MPa are predicted for UHCS containing 1. 8%C. In this paper, we will discuss the influence of processing (including rapid transformation during wire patenting) and micros ct- ure on the mechanical beha… more

Date: July 22, 1997

Creator: Lesuer, D. R.; Syn, C. K.; Sberby, O. D. & Whittenherger, W. D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Test wire for high voltage power supply crowbar system

The klystron microwave amplifier tubes used in the Low Energy Demonstration Accelerator (LEDA) and to be used in the Accelerator Production of Tritium (APT) plant have a strict upper limit on the amount of energy which can be safely dissipated within the klystron`s vacuum envelope during a high voltage arc. One way to prevent damage from occurring to the klystron microwave amplifier tube is through the use of a crowbar circuit which diverts the energy stored in the power supply filter capacitor… more

Date: September 1, 1997

Creator: Bradley, J.T. III & Collins, M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Department of Energy`s Wire Development Workshop - Superconductivity program for electric systems

The 1996 High-Temperature Superconducting Wire Development Workshop was held on January 31--February 1 at the Crown Plaza Tampa Westshore in Tampa, Florida. The meeting was hosted by Tampa Electric Company and sponsored by the Department of Energy`s Superconductivity Program for Electric Systems. The meeting focused on recent high-temperature superconducting wire development activities in the Department of Energy`s Superconductivity Systems program. Tampa Electric`s Greg Ramon began the meeting… more

Date: June 1, 1996

Item Type: Article

Partner: UNT Libraries Government Documents Department

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GEM detector conductor manufacturing experience

Feasibility studies and manufacturing experience on the GEM Magnet superconductor are presented, including all components - NbTi strand, cable, conduit manufacture, cable pulling, and aluminum sheath application.

Date: October 7, 1994

Creator: Martovetsky, N. N.; Pace, J. R.; Reardon, P. J.; Richied, D. E.; Camille, R. J.; Marston, P. G. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The characterization and selection of superconductor wire and cable for RHIC

This report describes the procedures used to select a single vendor for superconductor cable for the RHIC 80 mm dipole and quadrupole magnets, and some insertion dipoles with 110 mm aperture. Experience gained at BNL through involvement with the HERA and SSC Projects provided valuable Teaming experiences for this work. A performance specification was prepared and three qualified vendors were selected to complete a preproduction lot of 63,000 ft. of cable (approximately five multifilament billet… more

Date: January 1, 1992

Creator: Greene, A.F.; Garber, M.; Ghosh, A.K.; McChesney, D. & Morgillo, A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Microstructure and Mechanics of Superconductor Epitaxy via the Chemical Solution Deposition Method

Executive Summary: Initially the funds were sufficient funds were awarded to support one graduate student and one post-doc. Lange, though other funds, also supported a graduate intern from ETH Zurich, Switzerland for a period of 6 months. The initial direction was to study the chemical solution deposition method to understand the microstructural and mechanical phenomena that currently limit the production of thick film, reliable superconductor wires. The study was focused on producing thicker b… more

Date: November 30, 2006

Creator: Lange, Frederick F.

Item Type: Text

Partner: UNT Libraries Government Documents Department

open access

Experiment Showing a Mechanical Manifestation of the Helicity of Transport Current in Superconducting Wires

The transport current density of the mixed state of type II wires will have the form J = z J/sub z/ + THETA J/sub THETA/ when the supercurrent exhibits a helical distribution due to the application of an external field H/sub z/. This is proved by the magnetic moment measurements of Walmsley and Timms, who observed the so-called paramagnetic component of moment M when J/sub THETA/ not equal to 0. A mechanical manifestation of the helical current was observed by combining a normal-zone propagatio… more

Date: January 1, 1981

Creator: Overton, William C., Jr. & Weinstock, Harold

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Iridium-192 Production for Cancer Treatment

The purpose of this work is to settle a laboratory for Iridium -192 sources production, that is, to determine a wire activation method and to build a hot cell for the wires manipulation, quality control and packaging. The paper relates, mainly, the wire activation method and its quality control. The wire activation is carried out in our nuclear reactor, IEA- R1m.

Date: October 5, 2004

Creator: Rostelato, M.E.C.M.; Silva, C.P.G.; Rela, P.R.; Zeituni, C.A.; Lepki, V. & Feher, A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Evaluation of large, multifilament Nb/sub 3/Sn conductors with a new 12-Telsa tensile test apparatus

A large cryogenic tensile test apparatus has been constructed at the Lawrence Livermore Laboratory (LLL) as part of the Nb/sub 3/Sn conductor program. This equipment was designed so that mechanical measurements can be made at 300, 77, or 4.2 K and critical current can be measured under simulated operating conditions as a function of the strain on large, prototype conductors for fusion magnets. The maximum operating parameters of the machine are load = 2.23 x 10/sup 5/ N, magnetic field = 12 T, … more

Date: June 20, 1977

Creator: Deis, D. W.; Hirzel, D. G.; Rosdahl, A. R.; Roach, D. R.; Freynik, H. S. Jr. & Zbasnik, J. P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

THE PROPERTIES AND MICROSTRUCTURE OF NB-47TI SUPERCONDUCTOR WITH MAGNETIC PINNING CENTERS.

We have investigated Nb-47Ti multifilament wire with artificial pinning centers (APC). The superconducting properties and proximity effect in wires with ferromagnetic and non-magnetic pins will be discussed. Magnetization and transport measurements will be presented and the pinning characteristics will be discussed as a function of magnetic field, temperature and volume percent pins. In addition, field emission scanning electron microscopy of the pin nanostructure will be presented.

Date: February 4, 2004

Creator: MOTOWIDLO,L. R. RUDZIAK,M. D. WONG,T. COOLEY,L. D. LEE,P. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

THERMAL CONDUCTIVITY OF HELIUM AND HYDROGEN AT HIGH TEMPERATURES

A steady-state hot wire method for measuring the thermal conductivity of light gases in the temperature range 1200 to 2100 K is described. In contrast to other methods, free convection currents and large temperature gradients occur; convection effects are shown to be negligible, and an experimental procedure for eliminating the large gradient effects is described. The thermal conductivity of helium is found to follow the equation deg F. Cores o x 10/sup 6/ = 991 + 0.678(T - 1200) cal/sec cm deg… more

Date: April 1, 1959

Creator: Mann, J.B. & Blais, N.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Magnetoresistance of One-Dimensional Subbands in Tunnel-Coupled Double Quantum Wires

The authors study the low-temperature in-plane magnetoresistance of tunnel-coupled quasi-one-dimensional quantum wires. The wires are defined by two pairs of mutually aligned split gates on opposite sides of a {le} 1 micron thick AlGaAs/GaAs double quantum well heterostructure, allowing independent control of the width of each quantum well. In the ballistic regime, when both wires are defined and the field is perpendicular to the current, a large resistance peak at {approximately}6 Tesla is obs… more

Date: August 4, 1999

Creator: Moon, J. S.; Blount, M. A.; Simmons, J. A.; Wendt, J. R.; Lyo, S. K. & Reno, J. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Wire melting and droplet atomization in a high velocity oxy-fuel jet

Coatings produced by feeding a steel wire into a high-velocity oxy-fuel (HVOF) torch are being intensively studied by the automotive industry as a cost-effective alternative to the more expensive cast iron sleeves currently used in aluminum engine blocks. The microstructure and properties of the sprayed coatings and the overall economics of the process depend critically on the melting and atomization occurring at the wire tip. This paper presents results characterizing several aspects of wire m… more

Date: July 1, 1995

Creator: Neiser, R.A.; Brockmann, J.E. & O`Hern, T.J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Reduction of Vapor Carry-Under in Simulated Boiling

The effect on vapor carryunder in simulated boiling caused by insertion in the flow stream of several different geometric configurations and sizes of wire screens is described. The effect on vapor carryunder caused by screen location and mesh size is shown to be closely related to other system variables. The relationship among the most significant variables is shown in a series of graphs. Significant reduction of vapor carryunder is achieved under certain conditions. (auth)

Date: February 1, 1963

Creator: Miller, P.L. & Armstrong, C.P.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

CURRENT-CARRYING CAPACITY AND TRANSITION STATE OF SUPERCONDUCTING SOLENOIDS

A solenoid wound with high-field superconducting wire displays maximum currents and fields (H) that are less than the critical field of the wire itself in an equal field (H). Montgomery's and Chandraseknar and Hulm's models for these maximum properties indicate, respectively, a unique coil quenching characteristic for geometrically similar solenoids and one unique characteristic for all solenoids with identical wire type and turn distance. Experiments with Pb coils did not verify Mont… more

Date: January 1, 1963

Creator: Gauster, W F & Coffey, D L

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The Use of Filamentary Targets to Produce Prolonged Secondary-Particle Beams in the Bevatron

The foil technique for producing secondary-particle beams in a proton synchrotron is extended. Filamentary targets are described that are shown to produce secondaryparticle beams having almost arbitrary time duration and uniform intensity. The physical limitations imposed by available materials are discussed. (auth)

Date: March 1, 1960

Creator: Heard, H. G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Observation of circulation in rotating superfluid helium

~- Solid mixtures of isotopic helium separate into a /sup 3/ He-rich vefunction. This result may hopefully explain why the exchange energies in a mixture solid helium do not depend on /sup 3/He concentration strongly. (auth)

Date: March 1, 1973

Creator: Kral, S. F.

Item Type: Thesis or Dissertation

Partner: UNT Libraries Government Documents Department

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Comparison of quantum confinement effects between quantum wires and dots

Dimensionality is an important factor to govern the electronic structures of semiconductor nanocrystals. The quantum confinement energies in one-dimensional quantum wires and zero-dimensional quantum dots are quite different. Using large-scale first-principles calculations, we systematically study the electronic structures of semiconductor (including group IV, III-V, and II-VI) surface-passivated quantum wires and dots. The band-gap energies of quantum wires and dots have the same scaling with … more

Date: March 30, 2004

Creator: Li, Jingbo & Wang, Lin-Wang

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The Observation of an Optimal Wire Number Range in Long Implosion Time Aluminum Z-Pinches

No Description Available.

Date: November 30, 2000

Creator: Coverdale, Christine A.; Deeney, Christopher; Douglas, Melissa R.; Apruzese, J. P.; Whitney, K. G.; Thornhill, J. W. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

[Ripped Byrd diary]

Photograph of a notebook diary from the Byrd Williams Family Photography Collection, held by UNT Special Collections. It has a brown paper material as its covers and has a wire spiral holding the papers together. There is a rip between the top half and the bottom half of the notebook that goes fully through the entire book and the wire in this section is twisted and disconnected.

Date: July 20, 2016

Creator: Sylve, Joshua

Item Type: Photograph

Partner: UNT Libraries Special Collections

open access

Thermal conduction of SSC (Superconducting Super Collider) wire

A method suitable for measuring the thermal conductivity of good thermal conductors at low temperatures was implemented. It successfully served its purpose: to detect the effect of doping with manganese the interfilament part of the copper matrix of the superconducting wire used in the magnets of the Superconducting Super Collider. It uses two heaters and one thermometer per sample reducing the accuracy requirement on the thermometers, automatically compensating for zero offsets and reducing th… more

Date: August 1, 1989

Creator: Kuchnir, M. & Tague, J.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Magnetic properties and irreversibility behavior in Ag-sheathed Bi-based superconducting wires fabricated using a controlled melt procedure

A significant enhancement of the in-field J[sub c] of Ag-clad (Bi,Pb)-Sr-Ca-Cu-0 (BPSCCO:2223) wires has been achieved using a controlled melt procedure. The greatly reduced weak linking has resulted in an extended plateau regime in the J[sub c]-H curve. J[sub c]s of 40,000 A/cm[sup 2] at 77 K (self field) and 9,000 A/cm[sup 2] at 77 K (1 T) have been achieved. The improved J. H characteristics may be attributed to microstructures consisting of uniform grain alignment throughout the entire cros… more

Date: December 1, 1992

Creator: Dou, S.X.; Liu, H.K.; Guo, Y.C. (New South Wales Univ., Kensington, NSW (Australia). School of Materials Science and Engineering); Shi, D.L. (Argonne National Lab., IL (United States)); Sumption, M.D. & Collings, E.W. (Battelle Memorial Inst., Columbus, OH (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department