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CENRTC Project {number_sign}2F3EOA, OCB A-386, acceptance test procedure (open access)

CENRTC Project {number_sign}2F3EOA, OCB A-386, acceptance test procedure

This test procedure provides the steps necessary to verify correct functional operation of controls, annunciators, alarms, protective relays and related systems impacted by CENRTC {number_sign}2F3EOA, Microwave Transfer Trip Project, modification work performed under work package 6B-93-00043/M (CENRTC 2F3EOA MWTT OCB A-386 PACKAGE). This procedure separates four tests into separate sections: Energization of A-386 Duplex Panel and Circuits; Local RFL 6750 function tests and start-up; SCADA tests; and A-386 local trip tests.
Date: March 6, 1995
Creator: Akerson, A. W.
Object Type: Report
System: The UNT Digital Library
Observation of Polarized Positrons from an Undulator-Based Source (open access)

Observation of Polarized Positrons from an Undulator-Based Source

An experiment (E166) at the Stanford Linear Accelerator Center (SLAC) has demonstrated a scheme in which a multi-GeV electron beam passed through a helical undulator to generate multi-MeV, circularly polarized photons which were then converted in a thin target to produce positrons (and electrons) with longitudinal polarization above 80% at 6 MeV. The results are in agreement with Geant4 simulations that include the dominant polarization-dependent interactions of electrons, positrons and photons in matter.
Date: March 6, 2008
Creator: Alexander, G; Barley, J.; Batygin, Y.; Berridge, S.; Bharadwaj, V.; Bower, G. et al.
Object Type: Article
System: The UNT Digital Library
First Observation of B+ to rho+ K0 and Measurement of its Branching Fraction and Charge Asymmetry (open access)

First Observation of B+ to rho+ K0 and Measurement of its Branching Fraction and Charge Asymmetry

We present the first observation of the decay B{sup +} {yields} {rho}{sup +}K{sup 0}, using a data sample of 348 fb{sup -1} collected at the {Upsilon}(4S) resonance with the BABAR detector. The branching fraction and charge asymmetry are measured to be (8.0{sub -1.3}{sup +1.4} {+-} 0.5) x 10{sup -6} and (-12.2 {+-} 16.6 {+-} 2.0)%, respectively, where the first uncertainty is statistical and the second is systematic. The significance of the observed branching fraction, including systematic uncertainties, is 7.9 standard deviations.
Date: March 6, 2007
Creator: Aubert, B.
Object Type: Article
System: The UNT Digital Library
Measurement of CP Asymmetries in B0 to K0S K0S K0S Decays (open access)

Measurement of CP Asymmetries in B0 to K0S K0S K0S Decays

The authors present measurements of the time-dependent CP-violating asymmetries in B{sup 0} {yields} K{sub S}{sup 0}K{sub S}{sup 0}K{sub S}{sup 0} decays based on 384 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. They obtain the CP asymmetry parameters C = 0.02 {+-} 0.21 {+-} 0.05 and S = -0.71 {+-} 0.24 {+-} 0.04, where the first uncertainties are statistical and the second systematic. These results are consistent with standard model expectations.
Date: March 6, 2007
Creator: Aubert, B.
Object Type: Article
System: The UNT Digital Library
Measurement of CP-Violating Asymmetries in B0 to (rho pi)0 using a Time-Dependent Dalitz Plot Analysis (open access)

Measurement of CP-Violating Asymmetries in B0 to (rho pi)0 using a Time-Dependent Dalitz Plot Analysis

We report a measurement of CP-violating asymmetries in B{sup 0} {yields} ({rho}{pi}){sup 0} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup 0} decays using a time-dependent Dalitz plot analysis. The results are obtained from a data sample of 375 million {Upsilon}(4S) {yields} B{bar B} decays, collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure 26 coefficients of the bilinear form-factor terms occurring in the time-dependent decay rate of the B{sup 0} meson. We derive the physically relevant quantities from these coefficients. In particular, we measure a constraint on the angle {alpha} of the Unitarity Triangle.
Date: March 6, 2007
Creator: Aubert, B.
Object Type: Article
System: The UNT Digital Library
Productivity and injectivity of horizontal wells (open access)

Productivity and injectivity of horizontal wells

One of the key issues addressed was pressure drop in long horizontal wells and its influence on well performance. Very little information is available in the literature on flow in pipes with influx through pipe walls. Virtually all of this work has been in small diameter pipes and with single-phase flow. In order to address this problem new experimental data on flow in horizontal and near horizontal wells have been obtained. Experiments were conducted at an industrial facility on typical 6 1/8 ID, 100 feet long horizontal well model. The new data along with available information in the literature have been used to develop new correlations and mechanistic models. Thus it is now possible to predict, within reasonable accuracy, the effect of influx through the well on pressure drop in the well.
Date: March 6, 2000
Creator: Aziz, Khalid
Object Type: Report
System: The UNT Digital Library
Small modular biopower initiative Phase 1 feasibility studies executive summaries (open access)

Small modular biopower initiative Phase 1 feasibility studies executive summaries

The Phase 1 objective is a feasibility study that includes a market assessment, resource assessment, preliminary system design, and assessment of relevant environmental and safety considerations, and evaluation of financial and cost issues, and a preliminary business plan and commercialization strategy. Each participating company will share at least 20% of the cost of the first phase.
Date: March 6, 2000
Creator: Bain, R.
Object Type: Report
System: The UNT Digital Library
DRCELL: A software package for drift chamber cell design (open access)

DRCELL: A software package for drift chamber cell design

Designing a drift chamber cell geometry which optimizes resolution and two track separation is not a straightforward task. This paper describes a software package which helps visualize the behavior of drifting electrons within the cell under the influence of electric and magnetic fields. Histograms of chamber pulse shapes and arrival times may be generated. In addition, a calculation of the gas gain is performed. The package presently uses drift velocity, drift angle, gain, and dE/dx parameterizations for 50:50 argon/endash/ethane but modifications may be easily made for other gas mixtures. The model is straightforward and relies on an analytical form for the electric potential of an infinite series of wires. The electric field is calculated numerically in a small region surrounding any point of interest. In the absence of a magnetic field, the drift direction of an ionization electron is the unit vector along the E field direction. When a perpendicular magnetic field is present, the drift direction is rotated by the Lorentz angle, a. 3 refs., 2 figs., 1 tab.
Date: March 6, 1989
Creator: Baller, B. R.
Object Type: Report
System: The UNT Digital Library
Impedance Calculations of Non-Axisymmetric Transitions Using the Optical Approximation (open access)

Impedance Calculations of Non-Axisymmetric Transitions Using the Optical Approximation

In a companion report, we have derived a method for finding the impedance at high frequencies of vacuum chamber transitions that are short compared to the catch-up distance, in a frequency regime that--in analogy to geometric optics for light--we call the optical regime. In this report we apply the method to various non-axisymmetric geometries such as irises/short collimators in a beam pipe, step-in transitions, step-out transitions, and more complicated transitions of practical importance. Most of our results are analytical, with a few given in terms of a simple one dimensional integral. Our results are compared to wakefield simulations with the time-domain, finite-difference program ECHO, and excellent agreement is found.
Date: March 6, 2007
Creator: Bane, K. L. F.; Stupakov, G. & Zagorodov, I.
Object Type: Article
System: The UNT Digital Library
Femtosecond Laser Materials Processing (open access)

Femtosecond Laser Materials Processing

The use of femtosecond lasers allows materials processing of practically any material with extremely high precision and minimal collateral damage. Advantages over conventional laser machining (using pulses longer than a few tens of picoseconds) are realized by depositing the laser energy into the electrons of the material on a time scale short compared to the transfer time of this energy to the bulk of the material, resulting in increased ablation efficiency and negligible shock or thermal stress. The improvement in the morphology by using femtosecond pulses rather than nanosecond pulses has been studied in numerous materials from biologic materials to dielectrics to metals. During the drilling process, we have observed the onset of small channels which drill faster than the surrounding material.
Date: March 6, 2000
Creator: Banks, P. S.; Stuart, B. C.; Komashko, A. M.; Feit, M. D.; Rubenchik, A. M. & Perry, M. D.
Object Type: Article
System: The UNT Digital Library
1996 Hanford site annual dangerous waste report (open access)

1996 Hanford site annual dangerous waste report

This report is a description of the Hanford site's annual dangerous waste in 1996.
Date: March 6, 1997
Creator: Barcot, R. A.
Object Type: Report
System: The UNT Digital Library
Development of precision machining and inspection technology for structural ceramics (open access)

Development of precision machining and inspection technology for structural ceramics

Finish machining operations contribute the majority of the costs associated with fabricating high quality ceramic products. These components are typically used in harsh environments such as diesel engines, the defense industry, and automotive applications. The required finishing operations involve a variety of technology areas including process controls, process analysis, product certification, etc. and are not limited only to component grinding methods. The broad range of manufacturing problem solving expertise available in Oak Ridge provided resources that were far beyond what is available to the Coors manufacturing sites. Coors contributed equipment, such as the computer controls and part handling mechanisms associated with a state-of-the-art inspection machine plus operation-specific experience base. In addition, addressing these challenging tasks enabled Oak Ridge personnel to maintain familarity with rapidly advancing technologies, such as those associated with machine vision equipment, process monitoring techniques, and computer control systems.
Date: March 6, 1997
Creator: Barkman, W.E.
Object Type: Report
System: The UNT Digital Library
Observations of microstructural coarsening in micro flip-chip solder joints (open access)

Observations of microstructural coarsening in micro flip-chip solder joints

Coarsening of solder microstructures dramatically affects fatigue lifetimes. This paper presents a study of microstructural evolution due to thermal cycling and aging of small solder joints.
Date: March 6, 2001
Creator: Barney, Monica M. & Morris, John W., Jr.
Object Type: Article
System: The UNT Digital Library
From Non-Hermitian Effective Operators to Large-Scale No-Core Shell Model Calculations for Light Nuclei (open access)

From Non-Hermitian Effective Operators to Large-Scale No-Core Shell Model Calculations for Light Nuclei

No-core shell model (NCSM) calculations using ab initio effective interactions are very successful in reproducing experimental nuclear spectra. The main theoretical approach is the use of effective operators, which include correlations left out by the truncation of the model space to a numerically tractable size. We review recent applications of the effective operator approach, within a NCSM framework, to the renormalization of the nucleon-nucleon interaction, as well as scalar and tensor operators.
Date: March 6, 2006
Creator: Barrett, B R; Stetcu, I; Navratil, P & Vary, J P
Object Type: Article
System: The UNT Digital Library
Acceptance test report for the Westinghouse 100 ton hydraulic trailer (open access)

Acceptance test report for the Westinghouse 100 ton hydraulic trailer

The SY-101 Equipment Removal System 100 Ton Hydraulic Trailer was designed and built by KAMP Systems, Inc. Performance of the Acceptance Test Procedure at KAMP`s facility in Ontario, California (termed Phase 1 in this report) was interrupted by discrepancies noted with the main hydraulic cylinder. The main cylinder was removed and sent to REMCO for repair while the trailer was sent to Lampson`s facility in Pasco, Washington. The Acceptance Test Procedure was modified and performance resumed at Lampson (termed Phase 2 in this report) after receipt of the repaired cylinder. At the successful conclusion of Phase 2 testing the trailer was accepted as meeting all the performance criteria specified.
Date: March 6, 1995
Creator: Barrett, R.A.
Object Type: Report
System: The UNT Digital Library
Measuring the coherence properties of light emission from laser-plasma interactions. Final report (open access)

Measuring the coherence properties of light emission from laser-plasma interactions. Final report

Several detrimental instabilities can be excited when a high-intensity laser interacts with plasma. The temporal evolution and spectra of the scattered light emitted by many of these instabilities are used to characterize the instabilities and to benchmark theories. It has been difficult to image the emission region with sufficient resolution to make quantitative comparisons with theory. Direct measurement of the emission region would yield information on ponderomotive steepening phenomena, the true emission zone of convective instabilities, and on the saturation of absolute instabilities. The increase in laser intensity caused by the filamentation instability is conjectured to elevate the levels of parametric instabilities found in high-energy laser-plasma interactions. Because the diameter of the filaments is very small (on the order of 10 {micro}m), it is impossible to image the emission sites directly and either to prove or to disprove this conjecture. The research reported here examines an alternate method of measuring the emission region of scattered light from parametric instabilities. This report provides a brief background of coherence theory by defining the relevant parameters in Section 2. A concrete example of the effect that multiple scattering sites would have on the proposed measurement is provided in Section 3. The following section …
Date: March 6, 1998
Creator: Batha, S.H.
Object Type: Report
System: The UNT Digital Library
Modelling chronic atmospheric releases at the SRS: Evaluation and verification of XOQDOQ. [Atmospheric dispersion code used to estimate concentrations resulting from chronic releases of radioactivity] (open access)

Modelling chronic atmospheric releases at the SRS: Evaluation and verification of XOQDOQ. [Atmospheric dispersion code used to estimate concentrations resulting from chronic releases of radioactivity]

XOQDOQ is the atmospheric dispersion code used by the Savannah River Laboratory to estimate offsite concentrations resulting from chronic releases of radioactivity. This report documents evaluation and verification studies performed on XOQDOQ. The studies were designed to establish compliance with Site quality assurance requirements for high-impact software. Comparisons of XOQDOQ results with that of a series of spreadsheets indicate that the code is performing as intended by the designers. Relative concentration and deposition values, {chi}/Qs and D/Qs, calculated by the two methods differed by no more than 0.5% in any of the test cases. Estimates of ground-level air concentrations at the Site boundary calculated with XOQDOQ were compared with tritium concentrations measured at those locations. XOQDOQ generally overestimates tritium concentrations by a factor of 1 to 3. Other radionuclides released in recent years by the SRS have not been present in sufficient concentrations to permit evaluation efforts. However, previous studies of Kr-85, I-129, and Pu-238 have shown XOQDOQ predictions of offsite air concentrations to be adequate. Based on this review, the performance of XOQDOQ is acceptable for continued use at the SRS. Efforts to improve the code should also be continued. Sensitivity studies to such parameters as particle size distribution, …
Date: March 6, 1991
Creator: Bauer, L. R.
Object Type: Report
System: The UNT Digital Library
Ringlight for use in high radiation (open access)

Ringlight for use in high radiation

The present invention relates generally to ringlight for providing illumination about a central viewing area and more particularly to an improved ringlight design suitable for use in automatic gaging applications conducted in hostile radioactive environments. It is a further object of the present invention to provide a ringlight which is relatively simple in construction and with few parts, and which is thus very reliable in operation. The above and other objects are achieved in the present invention by a ringlight providing an annular array of light-emitting elements centered about a viewing passage, wherein the improvement comprises: a first annular body, a second annular body mounted concentrically within the first annular body so as to form an annular void and light-emitting aperture therebetween, and a plurality of optical fibers extending into the void with end portions thereof secured therein so as to form an annular array of optical fiber end surfaces at said light-emitting aperture, the first and second bodies cooperating to angle the end portions of the plurality of optical fibers toward a central axis of the viewing passage.
Date: March 6, 1991
Creator: Baylor, G. A. & Jacket, H. S.
Object Type: Patent
System: The UNT Digital Library
Sub-Scale Prototype Spent Nuclear Fuel/High Level Waste (SNF/HLW) Containers - B559010 REV 02 (open access)

Sub-Scale Prototype Spent Nuclear Fuel/High Level Waste (SNF/HLW) Containers - B559010 REV 02

None
Date: March 6, 2008
Creator: Beardsley, M
Object Type: Report
System: The UNT Digital Library
Relocation impacts of an H-Separations coil and tube failure (open access)

Relocation impacts of an H-Separations coil and tube failure

The relocation impacts of an accidental release, scenario 1-RD-2.35, are evaluated for H-Separations. The extent of the area potentially contaminated to a level that would result in doses exceeding the relocation protective action guide (PAG) is calculated. The maximum calculated distance downwind from the accident at which the relocation PAG is exceeded is also determined. The consequences of the release are evaluated using the HOTSPOT model and an EXCEL spreadsheet.
Date: March 6, 2000
Creator: Blanchard, A.
Object Type: Report
System: The UNT Digital Library
Investigations of charged interfaces for electric vehicle applications (open access)

Investigations of charged interfaces for electric vehicle applications

We refined the parametrization of our model for the hydrogen evolution on Pt(111) in the presence of SO4H2 [1,2,3,4]. In particular we studied the effects of changing the turning point of the water. The form of the voltammogram is not very sensitive to the exact position of the turning point, which in previous work was treated as an adjustable parameter. Physically a reasonable choice is that the turning point is the PZC (point of zero charge). This new parametrization clarified some issues related to the mechanism of hydrogen oxidation. In the early stages of this project, we tried with N. Marzari [5] to compute the ex-situ structure of the bisulfate-water √3X√7 (or also 5/2X√7) phase, seen by STM. However, we were unsuccessful in reproducing the known structures of the phase, even though we used state of the art pseudo potentials. There are various possible reasons why this happens, but the most obvious one is the environment of the electrode surface. This means that we need a theory that is able to include the local microfield as a function of the applied potential and electrochemical environment, and hence, we need to fully develop the density functional of a real molecular solvent …
Date: March 6, 2007
Creator: Blum, Lesser
Object Type: Report
System: The UNT Digital Library
Engineering task plan for AX-104 residual waste volume and inventory data collection (open access)

Engineering task plan for AX-104 residual waste volume and inventory data collection

The purpose of this Engineering Task Plan is to document the strategy, equipment and responsibilities of the tasks required to preform the volume and inventory data collection of tank AX-104. The project is a part of the Hanford Tanks Initiative Plan document number WHC-SD-WM-PMP-022 Revision D.
Date: March 6, 1997
Creator: Boechler, G. N.
Object Type: Report
System: The UNT Digital Library
Three-dimensional Reconstruction of Dust Particle Trajectories in the NSTX (open access)

Three-dimensional Reconstruction of Dust Particle Trajectories in the NSTX

Highly mobile incandescent dust particles are routinely observed on NSTX using two fast cameras operating in the visible region. An analysis method to reconstruct dust particle trajectories in space using two fast cameras is presented in this paper. Position accuracies of a few millimeters depending on the particle's location have been achieved and particle velocities between 10 and 200 m/s have been observed. 2008 American Institute of Physics. __________________________________________________
Date: March 6, 2009
Creator: Boeglin, W. U.; Roquemore, A. L. & Maqueda, R.
Object Type: Report
System: The UNT Digital Library
Corrosion of plutonium metal when stored in containers having plastic components (open access)

Corrosion of plutonium metal when stored in containers having plastic components

The conclusions are: (1) The formation of powder or ``oxide`` in the storage container is caused almost entirely by packaging of plutonium in plastic materials. (2) The corrosion of the plutonium follows degradation of the plastic due to the intense radiation. (3) The powder, formed by this corrosion is not PuO{sub 2} but a mixture of oxides, hydrides, and chlorides in varying proportions, depending on the type and amount of plastic in the individual storage container. (4) The powder consists predominantly of hydrides. Hydrogen is considered the major cause of severe corrosion. The surface-disruptive nature of hydriding prevents formation of any protective film on the metal. Fresh surface is provided continuously for further attack. (5) The hydrides are pyrophoric. Spontaneous ignition of the powder and metal occurs occasionally, immediately following opening of the container. This effect may be more severe for ingots than for buttons because of unreacted- or only partially-reacted metal fines in the powder from ingots. (6) Metal loss of eight percent in 100 days of storage has been observed for unalloyed ingot metal of moderate purity under the storage conditions described in this report. Corrosion rate depends on purity of the metal. Impurities in unalloyed metal inhibit …
Date: March 6, 1964
Creator: Bond, R. H.
Object Type: Report
System: The UNT Digital Library