Offshore Wind Turbines - Estimated Noise from Offshore Wind Turbine, Monhegan Island, Maine: Environmental Effects of Offshore Wind Energy Development (open access)

Offshore Wind Turbines - Estimated Noise from Offshore Wind Turbine, Monhegan Island, Maine: Environmental Effects of Offshore Wind Energy Development

Deep C Wind, a consortium headed by the University of Maine will test the first U.S. offshore wind platforms in 2012. In advance of final siting and permitting of the test turbines off Monhegan Island, residents of the island off Maine require reassurance that the noise levels from the test turbines will not disturb them. Pacific Northwest National Laboratory, at the request of the University of Maine, and with the support of the U.S. Department of Energy Wind Program, modeled the acoustic output of the planned test turbines.
Date: November 23, 2010
Creator: Aker, Pamela M.; Jones, Anthony M. & Copping, Andrea E.
Object Type: Report
System: The UNT Digital Library
Radiative B Decays (open access)

Radiative B Decays

I discuss recent results in radiative B decays from the Belle and BaBar collaborations. I report new measurements of the decay rate and CP asymmetries in b {yields} s{gamma} and b {yields} d{gamma} decays, and measurements of the photon spectrum in b {yields} s{gamma}. Radiative penguin decays are flavour changing neutral currents which do not occur at tree level in the standard model (SM), but must proceed via one loop or higher order diagrams. These transitions are therefore suppressed in the SM, but offer access to poorlyknown SM parameters and are also a sensitive probe of new physics. In the SM, the rate is dominated by the top quark contribution to the loop, but non-SM particles could also contribute with a size comparable to leading SM contributions. The new physics effects are potentially large which makes them theoretically very interesting, but due to their small branching fractions they are typically experimentally challenging.
Date: November 23, 2011
Creator: Bard, D.
Object Type: Article
System: The UNT Digital Library
TUNING SILICON NANORODS FOR ANODES OF LI-ION RECHARGEABLE BATTERIES (open access)

TUNING SILICON NANORODS FOR ANODES OF LI-ION RECHARGEABLE BATTERIES

Silicon is a promising anode material for Li-ion batteries in regarding of high capacity, low cost and safety, but it suffers poor cycling stability due to the pulverization induced by severe volume expansion/shrinkage (297%) during lithium insertion/extraction. In our previous investigation on aluminum nanorods anodes, it is found the selection of substrates in which Al nanorods grown plays the role in prevention of pulverization resulting in the increase of cycling life. Adapting this knowledge, we investigated the Si based nanorods anodes by tuning its composition and element distribution. Our results show that although the Si nanorods demonstrated higher initial anodic capacity of 1500 mAh/g, it diminished after 50 cycles due to morphology change and pulverization. By codepositing Cu, the Si-Cu composite nanorods demonstrated sustainable capacity of 500 mAh/g in 100 cycles attributing to its flexible and less brittle nature.
Date: November 23, 2010
Creator: Au, M.
Object Type: Article
System: The UNT Digital Library
Magnetic stochasticity in gyrokinetic simulations of plasma microturbulence (open access)

Magnetic stochasticity in gyrokinetic simulations of plasma microturbulence

None
Date: November 23, 2010
Creator: Nevins, W M; Wang, E & Candy, J
Object Type: Article
System: The UNT Digital Library
Research and Development of H Ion Source and LEBT for a Kaon-neutrino Factory (open access)

Research and Development of H Ion Source and LEBT for a Kaon-neutrino Factory

A baseline H{sup -} ion source and low energy beam transport system (LEBT) have been identified for Project X. The filament-discharge H{sup -} ion source has been fabricated by D-Pace, Inc. and is now in operation at LBNL. The source is capable of delivering over 10mA of H{sup -} beam in cw operation with normalized 4rms emittances less than 0.7 {pi} mm mrad. A two-solenoid magnetic lens LEBT system has been design. The design has been validated with simulations of beam transport for 5 mA 30 keV H- beams using various simulation codes.
Date: November 23, 2011
Creator: Ji, Q.; Staples, J.; Schenkel, T. & Li, D.
Object Type: Article
System: The UNT Digital Library
INCORPORATION OF MONO SODIUM TITANATE AND CRYSTALLINE SILICOTITANATE FEEDS IN HIGH LEVEL NUCLEAR WASTE GLASS (open access)

INCORPORATION OF MONO SODIUM TITANATE AND CRYSTALLINE SILICOTITANATE FEEDS IN HIGH LEVEL NUCLEAR WASTE GLASS

Four series of glass compositions were selected, fabricated, and characterized as part of a study to determine the impacts of the addition of Crystalline Silicotitanate (CST) and Monosodium Titanate (MST) from the Small Column Ion Exchange (SCIX) process on the Defense Waste Processing Facility (DWPF) glass waste form and the applicability of the DWPF process control models. All of the glasses studied were considerably more durable than the benchmark Environmental Assessment (EA) glass. The measured Product Consistency Test (PCT) responses were compared with the predicted values from the current DWPF durability model. One of the KT01-series and two of the KT03-series glasses had measured PCT responses that were outside the lower bound of the durability model. All of the KT04 glasses had durabilities that were predictable regardless of heat treatment or compositional view. In general, the measured viscosity values of the KT01, KT03, and KT04-series glasses are well predicted by the current DWPF viscosity model. The results of liquidus temperature (T{sub L}) measurements for the KT01-series glasses were mixed with regard to the predictability of the T{sub L} for each glass. All of the measured T{sub L} values were higher than the model predicted values, although most fell within the …
Date: November 23, 2010
Creator: Fox, K.; Johnson, F. & Edwards, T.
Object Type: Article
System: The UNT Digital Library
Sensitivity of CUORE to Neutrinoless Double-Beta Decay (open access)

Sensitivity of CUORE to Neutrinoless Double-Beta Decay

In this paper, we study the sensitivity of CUORE, a bolometric double-beta decay experiment under construction at the Laboratori Nazionali del Gran Sasso in Italy. Two approaches to the computation of experimental sensitivity are discussed and compared, and the formulas and parameters used in the sensitivity estimates are provided. Assuming a background rate of 10{sup -2} cts/(keV kg y), we find that, after 5 years of live time, CUORE will have a 1#27;{sigma} sensitivity to the neutrinoless double-beta decay half-life of {caret T{sup 0{nu}}{sub 1/2}}(1{sigma}#27;) = 1.6x#2;10{sup 26} y and thus a potential to probe the effective Majorana neutrino mass down to 41-95 meV; the sensitivity at 1.64{sigma}#27;, which corresponds to 90% C.L., will be {caret T{sup 0{nu}}{sub 1/2}(1.64{sigma}#27;}) = 9.5x10{sup 25} y. This range is compared with the claim of observation of neutrinoless double-beta decay in {sup 76}Ge and the preferred range in the neutrino mass parameter space from oscillation results.
Date: November 23, 2011
Creator: CUORE; Alessandria, F.; Andreotti, E.; Ardito, R.; Arnaboldi, C.; Avignone, F. T. III et al.
Object Type: Article
System: The UNT Digital Library
Gamma-Ray Pulsar Studies With GLAST (open access)

Gamma-Ray Pulsar Studies With GLAST

Some pulsars have their maximum observable energy output in the gamma-ray band, offering the possibility of using these high-energy photons as probes of the particle acceleration and interaction processes in pulsar magnetospheres. After an extended hiatus between satellite missions, the recently-launched AGILE mission and the upcoming Gamma-ray Large Area Space Telescope (GLAST) Large Area Telescope (LAT) will allow gamma-ray tests of the theoretical models developed based on past discoveries. With its greatly improved sensitivity, better angular resolution, and larger energy reach than older instruments, GLAST LAT should detect dozens to hundreds of new gamma-ray pulsars and measure luminosities, light curves, and phase-resolved spectra with unprecedented resolution. It will also have the potential to find radio-quiet pulsars like Geminga, using blind search techniques. Cooperation with radio and X-ray pulsar astronomers is an important aspect of the LAT team's planning for pulsar studies.
Date: November 23, 2011
Creator: Thompson, D. J. & /NASA, Goddard
Object Type: Article
System: The UNT Digital Library
2008 Idaho National Laboratory Annual Illness and Injury Surveillance Report (open access)

2008 Idaho National Laboratory Annual Illness and Injury Surveillance Report

The U.S. Department of Energy’s (DOE) commitment to assuring the health and safety of its workers includes the conduct of epidemiologic surveillance activities that provide an early warning system for health problems among workers. The Illness and Injury Surveillance Program monitors illnesses and health conditions that result in an absence of workdays, occupational injuries and illnesses, and disabilities and deaths among current workers.
Date: November 23, 2010
Creator: United States. Department of Energy. Office of Illness and Injury Prevention Programs.
Object Type: Report
System: The UNT Digital Library
Can the Existence of Dark Energy be Directly Detected? (open access)

Can the Existence of Dark Energy be Directly Detected?

The majority of astronomers and physicists accept the reality of dark energy and also believe that it can only be studied indirectly through observation of the motions of stars and galaxies. In this paper I open the experimental question of whether it is possible to directly detect dark energy through the presence of dark energy density. Two thirds of this paper outlines the major aspects of dark energy density as now comprehended by the astronomical and physics community. The final third summarizes various proposals for direct detection of dark energy density or its possible effects. At this time I do not have a fruitful answer to the question: Can the Existence of Dark Energy Be Directly Detected?
Date: November 23, 2011
Creator: Perl, Martin L. & /SLAC /KIPAC, Menlo Park
Object Type: Article
System: The UNT Digital Library
Searches for Exotic X,Y, and Z- States with BaBar (open access)

Searches for Exotic X,Y, and Z- States with BaBar

Recently, several charmonium-like states above D{bar D} threshold have been discovered at the BELLE and BABAR B-factories. Some of these states are produced via Initial State Radiation (e.g. Y (4260) and Y (4350)) and some are observed in B meson decays (e.g. X(3872), Y (3940)). The BELLE observation of the enhancement in the {psi}(2S){pi}{sup -}, i.e. the Z(4430){sup -} state, has generated a great deal of interest, because such a state must have minimum quark content (c{bar c}d{bar u}), so that it would represent the unequivocal manifestation of a four-quark meson state. Here we report recent BABAR results on the Y (4260), X(3872), Y(3940), and a search for the Z(4430){sup -}.
Date: November 23, 2011
Creator: Mokhtar, Arafat Gabareen
Object Type: Article
System: The UNT Digital Library
Detection and Attribution of Regional Climate Change with a Focus on the Precursors of Droughts - Final LDRD Report (open access)

Detection and Attribution of Regional Climate Change with a Focus on the Precursors of Droughts - Final LDRD Report

None
Date: November 23, 2012
Creator: Bonfils, C.
Object Type: Report
System: The UNT Digital Library
Model year 2010 Ford Fusion Level-1 testing report. (open access)

Model year 2010 Ford Fusion Level-1 testing report.

As a part of the US Department of Energy's Advanced Vehicle Testing Activity (AVTA), a model year 2010 Ford Fusion was procured by eTec (Phoenix, AZ) and sent to ANL's Advanced Powertrain Research Facility for the purposes of vehicle-level testing in support of the Advanced Vehicle Testing Activity. Data was acquired during testing using non-intrusive sensors, vehicle network information, and facilities equipment (emissions and dynamometer). Standard drive cycles, performance cycles, steady-state cycles, and A/C usage cycles were conducted. Much of this data is openly available for download in ANL's Downloadable Dynamometer Database. The major results are shown in this report. Given the benchmark nature of this assessment, the majority of the testing was done over standard regulatory cycles and sought to obtain a general overview of how the vehicle performs. These cycles include the US FTP cycle (Urban) and Highway Fuel Economy Test cycle as well as the US06, a more aggressive supplemental regulatory cycle. Data collection for this testing was kept at a fairly high level and includes emissions and fuel measurements from an exhaust emissions bench, high-voltage and accessory current/voltage from a DC power analyzer, and CAN bus data such as engine speed, engine load, and electric machine …
Date: November 23, 2010
Creator: Rask, E.; Bocci, D.; Duoba, M.; Lohse-Busch, H. & Systems, Energy
Object Type: Report
System: The UNT Digital Library
Undulator Beam Pipe Magnetic Shielding Effect Tests (open access)

Undulator Beam Pipe Magnetic Shielding Effect Tests

The proposed stainless steel beampipe for the LCLS undulator has a measurable shielding effect on the magnetic field of the LCLS undulators. This note describes the tests used to determine the magnitude of the shielding effect, as well as deviations in the shielding effect caused by placing different phase shims in the undulator gap. The effect of the proposed Steel strongback which will be used to support the beam pipe, was also studied. A hall probe on a 3 axis movement system was set up to measure the main component of the magnetic field in the Prototype Undulator. To account for temperature variations of the magnetic field of the undulator for successive tests, a correction is applied which is described in this technical note. Using this method, we found the shielding effect, the amount which the field inside the gap was reduced due to the placement of the beampipe, to be {approx}10 Gauss. A series of tests was also performed to determine the effect of phase shims and X and Y correction shims on the shielding. The largest effect on shielding was found for the .3 mm phase shims. The effect of the .3 mm phase shims was to increase …
Date: November 23, 2010
Creator: Fisher, Andrew & Wolf, Zachary
Object Type: Report
System: The UNT Digital Library
2009 ALCF annual report. (open access)

2009 ALCF annual report.

This year the Argonne Leadership Computing Facility (ALCF) delivered nearly 900 million core hours of science. The research conducted at their leadership class facility touched our lives in both minute and massive ways - whether it was studying the catalytic properties of gold nanoparticles, predicting protein structures, or unearthing the secrets of exploding stars. The authors remained true to their vision to act as the forefront computational center in extending science frontiers by solving pressing problems for our nation. Our success in this endeavor was due mainly to the Department of Energy's (DOE) INCITE (Innovative and Novel Computational Impact on Theory and Experiment) program. The program awards significant amounts of computing time to computationally intensive, unclassified research projects that can make high-impact scientific advances. This year, DOE allocated 400 million hours of time to 28 research projects at the ALCF. Scientists from around the world conducted the research, representing such esteemed institutions as the Princeton Plasma Physics Laboratory, National Institute of Standards and Technology, and European Center for Research and Advanced Training in Scientific Computation. Argonne also provided Director's Discretionary allocations for research challenges, addressing such issues as reducing aerodynamic noise, critical for next-generation 'green' energy systems. Intrepid - the …
Date: November 23, 2010
Creator: Beckman, P.; Martin, D. & Drugan, C.
Object Type: Report
System: The UNT Digital Library
Nano-composite Structures for OPV Devices (open access)

Nano-composite Structures for OPV Devices

Improved material for use in organic photovoltaics (OPV) devices, also called polymer-solar cells (PSC), has been developed. Increased ordering of the active layer of bulk heterojunction (BHJ) cells has been achieved by the use of inert silica spheres in conjunction with suitable fullerene derivatives. Silica spheres with average diameters between 10 and 15 nm, consistent with the exciton diffusion length in the active layer, have been added. The potential for significantly improved device performance due to a higher degree of photon absorption, enabled by increased light scattering, and a maximized interface between electron donor and acceptor, ensuring efficient exciton dissociation, has been demonstrated. A method allowing for the covalent attachment of fullerene derivatives to the silica sphere surface has been developed.
Date: November 23, 2010
Creator: Richter, Henning
Object Type: Report
System: The UNT Digital Library
Distillation Column Flooding Predictor (open access)

Distillation Column Flooding Predictor

The Flooding Predictor™ is a patented advanced control technology proven in research at the Separations Research Program, University of Texas at Austin, to increase distillation column throughput by over 6%, while also increasing energy efficiency by 10%. The research was conducted under a U. S. Department of Energy Cooperative Agreement awarded to George Dzyacky of 2ndpoint, LLC. The Flooding Predictor™ works by detecting the incipient flood point and controlling the column closer to its actual hydraulic limit than historical practices have allowed. Further, the technology uses existing column instrumentation, meaning no additional refining infrastructure is required. Refiners often push distillation columns to maximize throughput, improve separation, or simply to achieve day-to-day optimization. Attempting to achieve such operating objectives is a tricky undertaking that can result in flooding. Operators and advanced control strategies alike rely on the conventional use of delta-pressure instrumentation to approximate the column’s approach to flood. But column delta-pressure is more an inference of the column’s approach to flood than it is an actual measurement of it. As a consequence, delta pressure limits are established conservatively in order to operate in a regime where the column is never expected to flood. As a result, there is much “left …
Date: November 23, 2010
Creator: Dzyacky, George E.
Object Type: Text
System: The UNT Digital Library
Report on Modifications to the BX12 and BX13 BC1 Dipoles (open access)

Report on Modifications to the BX12 and BX13 BC1 Dipoles

Emittance growth seen during the last commissioning run in the bunch compressor optics section, BC1, was blamed on inadequate dipole field quality. The significant linear and nonlinear field non-uniformities generated large horizontal dispersion errors beyond BC1. The linear dispersion after BC1 was corrected using two small 'corrector' quadrupoles placed in BC1 for this purpose, but the remaining nonlinear field caused growth of the normalized horizontal emittance of 40% or more. At best {gamma}{epsilon}{sub x} went from 1.2 {micro}m before BC1 up to 1.7 {micro}m after BC1. The problem was magnified by the larger-than-design energy spread in BC1 due to a long initial bunch length. To improve the field quality we decided to modify the two 'inner dipoles', BX12 and BX13, of the four magnet chicane during the four month down time in the Fall of 2007. Only the two inner dipoles were chosen because of the limited time available and the fact that the beam is particularly sensitive to field quality of the inner dipoles due to its very large transverse size when going through them. The modifications were completed in November and included new poles and a new pinning scheme. The outer dipoles were left unchanged.
Date: November 23, 2010
Creator: Welch, James; DeBarge, S.; Emma, P.; Fisher, A.; Li, N. & Wu, J.
Object Type: Report
System: The UNT Digital Library
Neutron Cross Section Covariances in the Resonance Region: 50,53Cr, 54,57Fe and 60Ni (open access)

Neutron Cross Section Covariances in the Resonance Region: 50,53Cr, 54,57Fe and 60Ni

We evaluated covariances in the neutron resonance region for capture and elastic scattering cross sections on minor structural materials, {sup 50,53}Cr, {sup 54,57}Fe and {sup 60}Ni. Use was made of the recently developed covariance formalism based on kernel approximation along with data in the Atlas of Neutron Resonances. Our results of most interest for advanced fuel cycle applications, elastic scattering cross section uncertainties at energies around 100 keV, are on the level of about 7-10%.
Date: November 23, 2010
Creator: Oblozinsky, P.; Cho, Y.-S.; Mattoon, C. M. & Mughabghab, S. F.
Object Type: Report
System: The UNT Digital Library
Beam Polarization at the ILC: the Physics Impact and the Accelerator Solutions (open access)

Beam Polarization at the ILC: the Physics Impact and the Accelerator Solutions

In this contribution accelerator solutions for polarized beams and their impact on physics measurements are discussed. Focus are physics requirements for precision polarimetry near the interaction point and their realization with polarized sources. Based on the ILC baseline programme as described in the Reference Design Report (RDR), recent developments are discussed and evaluated taking into account physics runs at beam energies between 100 GeV and 250 GeV, as well as calibration runs on the Z-pole and options as the 1TeV upgrade and GigaZ. The studies, talks and discussions presented at this conference demonstrated that beam polarization and its measurement are crucial for the physics success of any future linear collider. To achieve the required precision it is absolutely decisive to employ multiple devices for testing and controlling the systematic uncertainties of each polarimeter. The polarimetry methods for the ILC are complementary: with the upstream polarimeter the measurements are performed in a clean environment, they are fast and allow to monitor time-dependent variations of polarization. The polarimeter downstream the IP will measure the disrupted beam resulting in high background and much lower statistics, but it allows access to the depolarization at the IP. Cross checks between the polarimeter results give redundancy …
Date: November 23, 2011
Creator: Aurand, B.; Bailey, I.; Bartels, C.; Brachmann, A.; Clarke, J.; Hartin, A. et al.
Object Type: Article
System: The UNT Digital Library
Gravitomagnetism in Quantum Mechanics (open access)

Gravitomagnetism in Quantum Mechanics

None
Date: November 23, 2011
Creator: Adler, Ronald J.; /Stanford U., HEPL; Chen, Pisin & /Taiwan, Natl. Taiwan U. /KIPAC, Menlo Park
Object Type: Article
System: The UNT Digital Library
DAFNE Status Report (open access)

DAFNE Status Report

DAFNE, the Frascati {Phi}-factory, is providing an increasing peak and integrated luminosity for the KLOE experiment. Such improvements, together with a background reduction in the KLOE detector, have been obtained after continuous machine studies. An increase of the single bunch luminosity has been achieved essentially by the reduction of the effects of machine non-linearities. The integrated luminosity was improved by the capability of topping up the beam currents while keeping the KLOE detector on, together with an increase of the stored currents.
Date: November 23, 2011
Creator: Boscolo, M.; Alesini, D.; Benedetti, G.; Bertolucci, S.; Biscari, C.; Boni, R. et al.
Object Type: Article
System: The UNT Digital Library
GLAST Prospects for Swift-Era Afterglows (open access)

GLAST Prospects for Swift-Era Afterglows

We calculate the GeV spectra of gamma-ray burst afterglows produced by inverse Compton scattering of these objects sub-MeV emission. We improve on earlier treatments by using refined afterglow parameters and new model developments motivated by recent Swift observations. We present time-dependent GeV spectra for standard, constant-parameter models, as well as for models with energy injection and with time-varying parameters, for a range of burst parameters. We evaluate the limiting redshift to which such afterglows can be detected by the GLAST Large Area Telescope, as well as by AGILE.
Date: November 23, 2011
Creator: Gou, L.J.; /Penn State U., Astron. Astrophys.; Meszaros, P. & U., /Penn State
Object Type: Article
System: The UNT Digital Library