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41
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39
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27
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10
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The Development of the Undulator Controls Module at the Linac Coherent Light Source
The Linac Coherent Light Source, LCLS, at the SLAC National Accelerator Laboratory, SNAL, is the first hard x-ray Free Electron Laser. The Undulator Controls Module, UCM, controls five cams and two translation stages that regulate the position of each of the 33 permanent undulator magnet segments within 10 microns. The UCM package, hardware and software, was designed and built by the Advanced Photon Source at Argonne. Important lessons were learned throughout the collaborative design, installation, testing, and commissioning periods that could be invaluable to future similar controls projects.
Date:
December 11, 2009
Creator:
Alarcon, A. D.
Object Type:
Article
System:
The UNT Digital Library
Timpson & Tenaha News (Timpson, Tex.), Vol. 28, No. 23, Ed. 1 Thursday, June 11, 2009
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
June 11, 2009
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Energy Saving Glass Lamination via Selective Radio Frequency Heating
Ceralink Inc. developed FastFuse™, a rapid, new, energy saving process for lamination of glass and composites using radio frequency (RF) heating technology. The Inventions and Innovations program supported the technical and commercial research and development needed to elevate the innovation from bench scale to a self-supporting technology with significant potential for growth. The attached report provides an overview of the technical and commerical progress achieved for FastFuse™ during the course of the project. FastFuse™ has the potential to revolutionize the laminate manufacturing industries by replacing energy intensive, multi-step processes with an energy efficient, single-step process that allows higher throughput. FastFuse™ transmits RF energy directly into the interlayer to generate heat, eliminating the need to directly heat glass layers and the surrounding enclosures, such as autoclaves or vacuum systems. FastFuse™ offers lower start-up and energy costs (up to 90% or more reduction in energy costs), and faster cycles times (less than 5 minutes). FastFuse™ is compatible with EVA, TPU, and PVB interlayers, and has been demonstrated for glass, plastics, and multi-material structures such as photovoltaics and transparent armor.
Date:
November 11, 2009
Creator:
Allan, Shawn M.; Strickland, Patricia M. & Shulman, Holly S.
Object Type:
Report
System:
The UNT Digital Library
The Oklahoma Daily (Norman, Okla.), Vol. 94, No. 156, Ed. 1 Thursday, June 11, 2009
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
June 11, 2009
Creator:
Atkinson, Luke
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Solution to Monthly Problem #11418
None
Date:
March 11, 2009
Creator:
Bailey, David H. & Borwein, J. M.
Object Type:
Report
System:
The UNT Digital Library
DWPF GC FILTER ASSEMBLY SAMPLING AND ANALYSIS
On March 18, 2009 a Defense Waste Processing Facility (DWPF) GC Line Filter Assembly was received at the Savannah River National Laboratory (SRNL). This filter assembly was removed from operation following the completion of Sludge Batch 4 processing in the DWPF. Work on this sample was requested in a Technical Assistance Request. This document reports the pictures, observations, samples collected, and analytical results for the assembly. The assembly arrived at SRNL separated into its three component filters: high efficiency particulate air (HEPA)-1, HEPA-2, and a high efficiency mist evaporator (HEME). Each stage of the assembly's media was sampled and examined visually and by scanning electron microscopy (SEM). Solids built up in the filter housing following the first stage HEME, were dissolved in dilute nitric acid and analyzed by ICP-AES and the undissolved white solids were analyzed by x-ray diffraction (XRD). The vast majority of the material in each of the three stages of the DWPF GC Line Filter Assembly appears to be contaminated with a Hg compound that is {approx}59 wt% Hg on a total solids basis. The Hg species was identified by XRD analysis to contain a mixture of Hg{sub 4}(OH)(NO{sub 3}){sub 3} and Hg{sub 10}(OH){sub 4}(NO{sub 3}){sub 6}. …
Date:
November 11, 2009
Creator:
Bannochie, C. & Imrich, K.
Object Type:
Report
System:
The UNT Digital Library
Pacific Northwest National Laboratory Site Dose-per-Unit-Release Factors for Use in Calculating Radionuclide Air Emissions Potential-to-Emit Doses
This report documents assumptions and inputs used to prepare the dose-per-unit-release factors for the Pacific Northwest National Laboratory (PNNL) Site (including the buildings that make up the Physical Sciences Facility [PSF] as well as the Environmental Molecular Sciences Laboratory [EMSL]) calculated using the EPA-approved Clean Air Act Assessment Package 1988–Personal Computer (CAP88-PC) Version 3 software package. The dose-per-unit-release factors are used to prepare dose estimates for a maximum public receptor (MPR) in support of Radioactive Air Pollutants Notice of Construction (NOC) applications for the PNNL Site.
Date:
June 11, 2009
Creator:
Barnett, J. M. & Rhoads, Kathleen
Object Type:
Report
System:
The UNT Digital Library
Experiences from First Top-Off Injection at the Stanford Synchrotron Radiation Light source
As the Stanford Synchrotron Radiation Lightsource (SSRL) of the SLAC National Accelerator Laboratory (SLAC) is moving toward Top-Off injection mode, SLAC's Radiation Protection Department is working with SSRL on minimizing the radiological hazards of this mode. One such hazard is radiation that is created inside the accelerator concrete enclosure by injected beam. Since during Top-Off injection the stoppers that would otherwise isolate the storage ring from the experimental area stay open, the stoppers no longer prevent such radiation from reaching the experimental area. The level of this stray radiation was measured in April 2008 during the first Top-Off injection tests. They revealed radiation dose rates of up to 18 microSv/h (1.8 millirem/h) outside the experimental hutches, significantly higher than our goal of 1 microSv/h (0.1 millirem/h). Non-optimal injection increased the measured dose rates by a factor two. Further tests in 2008 indicated that subsequent improvements by SSRL to the injection system have reduced the dose rates to acceptable levels. This presentation describes the studies performed before the Top-Off tests, the tests themselves and their major results (both under initial conditions and after improvements were implemented), and presents the controls being implemented for full and routine Top-Off injection.
Date:
December 11, 2009
Creator:
Bauer, J. M.; Liu, J. C.; Prinz, A. & Rokni, S. H.
Object Type:
Article
System:
The UNT Digital Library
Fiscal Year 2009 Phased Construction Completion Report for EU Z2-36 in Zone 2, East Tennessee Technology Park, Oak Ridge, Tennessee
None
Date:
March 11, 2009
Creator:
Bechtel Jacobs
Object Type:
Report
System:
The UNT Digital Library
Biotechnology in Animal Agriculture: Status and Current Issues
This report describes several scientifically emerging animal biotechnologies that are raising a variety of questions concerning risks to humans, animals, and the environment, as well as ethical concerns. The report examines applications of the technologies and discusses major issues that may arise.
Date:
February 11, 2009
Creator:
Becker, Geoffrey S. & Cowan, Tadlock
Object Type:
Report
System:
The UNT Digital Library
Near Edge X-Ray Absorption Fine Structure Spectroscopy with X-Ray Free-Electron Lasers
We demonstrate the feasibility of Near Edge X-ray Absorption Fine Structure (NEXAFS) spectroscopy on solids by means of femtosecond soft x-ray pulses from a free-electron laser (FEL). Our experiments, carried out at the Free-Electron Laser at Hamburg (FLASH), used a special sample geometry, spectrographic energy dispersion, single shot position-sensitive detection and a data normalization procedure that eliminates the severe fluctuations of the incident intensity in space and photon energy. As an example we recorded the {sup 3}D{sub 1} N{sub 4,5}-edge absorption resonance of La{sup 3+}-ions in LaMnO{sub 3}. Our study opens the door for x-ray absorption measurements on future x-ray FEL facilities.
Date:
December 11, 2009
Creator:
Bernstein, D.P.; Acremann, Y.; Scherz, A.; Burkhardt, M.; Stohr, J.; Beye, M. et al.
Object Type:
Article
System:
The UNT Digital Library
Hanford Site Environmental Surveillance Data Report for Calendar Year 2008
Environmental surveillance on and around the Hanford Site, located in southeastern Washington State, is conducted by the Pacific Northwest National Laboratory, which is operated by Battelle for the U.S. Department of Energy. The environmental surveillance data collected for this report provide a historical record of radionuclide and radiation levels attributable to natural causes, worldwide fallout, and Hanford Site operations. Data were also collected to monitor several chemicals and metals in Columbia River water, sediment, and wildlife. These data are included in this appendix. This report is the first of two appendices that support "Hanford Site Environmental Report for Calendar Year 2008" (PNNL-18427), which describes the Hanford Site mission and activities, general environmental features, radiological and chemical releases from operations, status of compliance with environmental regulations, status of programs to accomplish compliance, Hanford Site cleanup and remediation efforts, and environmental monitoring activities and results.
Date:
August 11, 2009
Creator:
Bisping, Lynn E.
Object Type:
Report
System:
The UNT Digital Library
The United Arab Emirates Nuclear Program and Proposed U.S. Nuclear Cooperation
None
Date:
June 11, 2009
Creator:
Blanchard, Christopher M. & Kerr, Paul K.
Object Type:
Report
System:
The UNT Digital Library
The United Nations Human Rights Council: Issues for Congress
This report provides historical background of the Council, including the role of the previous Commission. It discusses the Council's current mandate and structure, as well as U.S. policy and congressional actions.
Date:
March 11, 2009
Creator:
Blanchfield, Luisa
Object Type:
Report
System:
The UNT Digital Library
Characterization of Atomic and Electronic Structures of Electrochemically Active SOFC Cathode Surfaces
The objective of this project is to gain a fundamental understanding of the oxygen-reduction mechanism on mixed conducting cathode materials by means of quantum-chemical calculations coupled with direct experimental measurements, such as vibrational spectroscopy. We have made progress in the elucidation of the mechanisms of oxygen reduction of perovkite-type cathode materials for SOFCs using these quantum chemical calculations. We established computational framework for predicting properties such as oxygen diffusivity and reaction rate constants for adsorption, incorporation, and TPB reactions, and formulated predictions for LSM- and LSC-based cathode materials. We have also further developed Raman spectroscopy as well as SERS as a characterization tool for SOFC cathode materials. Raman spectroscopy was used to detect chemical changes in the cathode from operation conditions, and SERS was used to probe for pertinent adsorbed species in oxygen reduction. However, much work on the subject of unraveling oxygen reduction for SOFC cathodes remains to be done.
Date:
August 11, 2009
Creator:
Blinn, Kevin; Choi, Yongman & Liu, Meilin
Object Type:
Report
System:
The UNT Digital Library
PTC, ITC, or Cash Grant? An Analysis of the Choice Facing Renewable Power Projects in the United States
Renewable power technologies are inherently capital-intensive, often (but not always) with relatively high construction costs and low operating costs. For this reason, renewable power technologies are typically more sensitive to the availability and cost of financing than are natural gas power plants, for example. In the United States, the bulk of renewable project finance in recent years has been provided by 'tax equity investors' (typically large investment banks and insurance companies) who partner with project developers through highly specialized financing structures (Bolinger, 2009; Cory et al., 2008; Harper et al., 2007). These structures have been designed primarily to capitalize on federal support for renewable power technologies, which has historically come in the form of tax credits and accelerated depreciation deductions. The number of tax equity investors active in the renewable power market has declined precipitously, however, as a result of the financial crisis that began unfolding across the globe in the summer of 2008. The resulting shortage and increased cost of project financing has, in turn, slowed the development of new renewable power projects, leading to layoffs throughout the entire industry supply chain. In recognition of the fact that tax-based policy incentives are not particularly effective when tax burdens are …
Date:
March 11, 2009
Creator:
Bolinger, Mark; Wiser, Ryan; Cory, Karlynn & James, Ted
Object Type:
Report
System:
The UNT Digital Library
Potential F-22 Raptor Export to Japan
This report discusses issues surrounding Japan's interest in purchasing the F-22A Raptor aircraft from the United States. Although the export of the plane is now prohibited by U.S. law, Congress has recently and may again consider repealing this ban.
Date:
March 11, 2009
Creator:
Bolkcom, Christopher & Chanlett-Avery, Emma
Object Type:
Report
System:
The UNT Digital Library
Isotopic mass-dependence of metal cation diffusion coefficients in liquid water
Isotope distributions in natural systems can be highly sensitive to the mass (m) dependence of solute diffusion coefficients (D) in liquid water. Isotope geochemistry studies routinely have assumed that this mass dependence either is negligible (as predicted by hydrodynamic theories) or follows a kinetic-theory-like inverse square root relationship (D {proportional_to} m{sup -0.5}). However, our recent experimental results and molecular dynamics (MD) simulations showed that the mass dependence of D is intermediate between hydrodynamic and kinetic theory predictions (D {proportional_to} m{sup -{beta}} with 0 {<=} {beta} < 0.2 for Li{sup +}, Cl{sup -}, Mg{sup 2+}, and the noble gases). In this paper, we present new MD simulations and experimental results for Na{sup +}, K{sup +}, Cs{sup +}, and Ca{sup 2+} that confirm the generality of the inverse power-law relation D {proportional_to} m{sup -{beta}}. Our new findings allow us to develop a general description of the influence of solute valence and radius on the mass dependence of D for monatomic solutes in liquid water. This mass dependence decreases with solute radius and with the magnitude of solute valence. Molecular-scale analysis of our MD simulation results reveals that these trends derive from the exponent {beta} being smallest for those solutes whose motions are …
Date:
January 11, 2009
Creator:
Bourg, Ian C.; Richter, Frank M.; Christensen, John N. & Sposito, Garrison
Object Type:
Article
System:
The UNT Digital Library
[Letter from Ernie Boyette to Helen Wyatt Snapp, March 11, 2009]
Letter from Ernie Boyette to Helen Wyatt Snapp discussing the publication of Boyette's book, which Snapp contributed to with her own story as a Women Airforce Service Pilot.
Date:
March 11, 2009
Creator:
Boyette, Ernie
Object Type:
Letter
System:
The Portal to Texas History
Ionic Liquids for Utilization of Waste Heat from Distributed Power Generation Systems
The objective of this research project was the development of ionic liquids to capture and utilize waste heat from distributed power generation systems. Ionic Liquids (ILs) are organic salts that are liquid at room temperature and they have the potential to make fundamental and far-reaching changes in the way we use energy. In particular, the focus of this project was fundamental research on the potential use of IL/CO2 mixtures in absorption-refrigeration systems. Such systems can provide cooling by utilizing waste heat from various sources, including distributed power generation. The basic objectives of the research were to design and synthesize ILs appropriate for the task, to measure and model thermophysical properties and phase behavior of ILs and IL/CO2 mixtures, and to model the performance of IL/CO2 absorption-refrigeration systems.
Date:
January 11, 2009
Creator:
Brennecke, Joan F.; Sen, Mihir; Maginn, Edward J.; Paolucci, Samuel; Stadtherr, Mark A.; Disser, Peter T. et al.
Object Type:
Report
System:
The UNT Digital Library
Perry Daily Journal (Perry, Okla.), Vol. 117, No. 29, Ed. 1 Wednesday, February 11, 2009
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 11, 2009
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 117, No. 49, Ed. 1 Wednesday, March 11, 2009
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 11, 2009
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 117, No. 72, Ed. 1 Saturday, April 11, 2009
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 11, 2009
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 117, No. 115, Ed. 1 Thursday, June 11, 2009
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
June 11, 2009
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History