US Activities in the Development of Plasma-Based X-ray Lasers (open access)

US Activities in the Development of Plasma-Based X-ray Lasers

None
Date: October 5, 2005
Creator: Dunn, J
Object Type: Article
System: The UNT Digital Library
The radiative influence of aerosol effects on liquid-phase cumulusclouds based on sensitivity studies with two climate models (open access)

The radiative influence of aerosol effects on liquid-phase cumulusclouds based on sensitivity studies with two climate models

None
Date: October 5, 2005
Creator: Menon, Surabi & Rotstayn, Leon
Object Type: Article
System: The UNT Digital Library
2003 Savannah River Site Annual Illness and Injury Surveillance Report, Revised September 2007 (open access)

2003 Savannah River Site Annual Illness and Injury Surveillance Report, Revised September 2007

Annual Illness and Injury Surveillance Program report for 2003 for the Savannah River Site. DOE is 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 report monitors illnesses and health conditions that result in an absence of workdays, occupational injuries and illnesses, and disabilities and deaths among current workers.
Date: October 5, 2007
Creator: United States. Department of Energy. Office of Illness and Injury Prevention Programs.
Object Type: Report
System: The UNT Digital Library
Texas Attorney General Opinion: GA-0365 (open access)

Texas Attorney General Opinion: GA-0365

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Greg Abbott, regarding a legal question submitted for clarification: Whether a peace officer commissioned by the Texas Department of Public Safety is an “appointed officer” for purposes of article XVI, section 1 of the Texas Constitution (RQ-0333-GA)
Date: October 5, 2005
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
General Management Laws and the 9/11 Commissions Proposed Office of National Intelligence Director (NIC) and National Counterterrorism Center (NCTC) (open access)

General Management Laws and the 9/11 Commissions Proposed Office of National Intelligence Director (NIC) and National Counterterrorism Center (NCTC)

None
Date: October 5, 2004
Creator: Brass, Clinton T. & Copeland, Curtis W.
Object Type: Report
System: The UNT Digital Library
U.S. Public Diplomacy: Background and the 9/11 Commission Recommendations (open access)

U.S. Public Diplomacy: Background and the 9/11 Commission Recommendations

None
Date: October 5, 2004
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Telemarketing: Dealing with Unwanted Telemarketing Calls (open access)

Telemarketing: Dealing with Unwanted Telemarketing Calls

This report provides summaries of the federal laws and regulations particular to telemarketing, the establishment of a national do-not-call registry, and on the options that are available to consumers to attempt to limit the calls that they receive from telemarketers and to report questionable telemarketing practices to local or federal authorities. The report also lists sources of additional information with addresses, phone numbers, and Internet sites (if available) and will be updated as legislation or news events warrant.
Date: October 5, 2004
Creator: Riehl, James R.
Object Type: Report
System: The UNT Digital Library
Improved Energy Coupling into the Gain Region of the Ni-Like Pd Transient Collisional X-Ray Laser (open access)

Improved Energy Coupling into the Gain Region of the Ni-Like Pd Transient Collisional X-Ray Laser

We present within this paper a series of experiments, which yield new observations to further our understanding of the transient collisional x-ray laser medium. We use the recently developed technique of picosecond x-ray laser interferometry to probe the plasma conditions in which the x-ray laser is generated and propagates. This yields two dimensional electron density maps of the plasma taken at different times relative to the peak of the 600ps plasma-forming beam. In another experimental campaign, the output of the x-ray laser plasma column is imaged with a spherical multilayer mirror onto a CCD camera to give a two-dimensional intensity map of the x-ray laser output. Near-field imaging gives insights into refraction, output intensity and spatial mode structure. Combining these images with the density maps gives an indication of the electron density at which the x-ray laser is being emitted at (yielding insights into the effect of density gradients on beam propagation). Experimental observations coupled with simulations predict that most effective coupling of laser pump energy occurs when the duration of the main heating pulse is comparable to the gain lifetime ({approx}10ps for Ni-like schemes). This can increase the output intensity by more than an order of magnitude relative to …
Date: October 5, 2004
Creator: Smith, R.; Dunn, J.; Filevich, J.; Moon, S.; Nilsen, J.; Keenan, R. et al.
Object Type: Article
System: The UNT Digital Library
March 11 Terrorist Attacks in Madrid and Spain’s Elections: Implications for U.S. Policy (open access)

March 11 Terrorist Attacks in Madrid and Spain’s Elections: Implications for U.S. Policy

None
Date: October 5, 2004
Creator: unknown
Object Type: Report
System: The UNT Digital Library
China and Proliferation of Weapons of Mass Destruction and Missiles: Policy Issues (open access)

China and Proliferation of Weapons of Mass Destruction and Missiles: Policy Issues

This report discusses the national security problem of China's role in weapons proliferation and issues related to the U.S. policy response, including legislation, since the mid-1990's.
Date: October 5, 2005
Creator: Kan, Shirley A.
Object Type: Report
System: The UNT Digital Library
Dangerous Waste Characteristics of Contact-Handled Transuranic Mixed Wastes from Hanford Tanks (open access)

Dangerous Waste Characteristics of Contact-Handled Transuranic Mixed Wastes from Hanford Tanks

This report summarizes existing analytical data gleaned from samples taken from the Hanford tanks designated as potentially containing transuranic mixed process wastes. Process knowledge of the wastes transferred to these tanks has been reviewed to determine whether the dangerous waste characteristics now assigned to all Hanford underground storage tanks are applicable to these particular wastes. Supplemental technologies are being examined to accelerate the Hanford tank waste cleanup mission and accomplish waste treatment safely and efficiently. To date, 11 Hanford waste tanks have been designated as potentially containing contact-handled (CH) transuranic mixed (TRUM) wastes. The CH-TRUM wastes are found in single-shell tanks B-201 through B-204, T-201 through T-204, T-104, T-110, and T-111. Methods and equipment to solidify and package the CH-TRUM wastes are part of the supplemental technologies being evaluated. The resulting packages and wastes must be acceptable for disposal at the Waste Isolation Pilot Plant (WIPP). The dangerous waste characteristics being considered include ignitability, corrosivity, reactivity, and toxicity arising from the presence of 2,4,5-trichlorophenol at levels above the dangerous waste threshold. The analytical data reviewed include concentrations of sulfur, sulfate, cyanide, 2,4,5-trichlorophenol, total organic carbon, and oxalate; the composition of the tank headspace, pH, and mercury. Differential scanning calorimetry results …
Date: October 5, 2004
Creator: Tingey, Joel M.; Bryan, Garry H. & Deschane, Jaquetta R.
Object Type: Report
System: The UNT Digital Library
Federal Railroad Safety Programs: Selected Issues in Proposed Reauthorization Legislation (open access)

Federal Railroad Safety Programs: Selected Issues in Proposed Reauthorization Legislation

This report describes the major issues in the debate over reauthorization of FRA in the 110th Congress.
Date: October 5, 2007
Creator: Peterman, David Randall
Object Type: Report
System: The UNT Digital Library
What Is the “Farm Bill”? (open access)

What Is the “Farm Bill”?

None
Date: October 5, 2007
Creator: Johnson, Renée
Object Type: Report
System: The UNT Digital Library
Omnibus Appropriations Acts: Overview of Recent Practices (open access)

Omnibus Appropriations Acts: Overview of Recent Practices

None
Date: October 5, 2004
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Energy Efficiency and Renewable Energy Legislation in the 110th Congress (open access)

Energy Efficiency and Renewable Energy Legislation in the 110th Congress

This report reviews the status of energy efficiency and renewable energy legislation introduced during the 110th Congress. Most Senate action led to the Senate version of H.R. 6, an omnibus energy bill that the Senate passed on June 21, 2007. Most House action led to the omnibus energy bill H.R. 3221, which the House passed on August 4, 2007. A second area of focus has been on the funding-related bills for energy efficiency and renewable energy, especially H.R. 2641, the Energy and Water Appropriations bill for FY2008.
Date: October 5, 2007
Creator: Sissine, Fred; Gillis, Anne & Gurevitz, Mark
Object Type: Report
System: The UNT Digital Library
Food Safety: Oversight and Current Issues (open access)

Food Safety: Oversight and Current Issues

None
Date: October 5, 2007
Creator: Becker, Geoffrey S.
Object Type: Report
System: The UNT Digital Library
Possible Laminographic and Tomosynthesis Applications for Wolter Microscope Scan Geometries (open access)

Possible Laminographic and Tomosynthesis Applications for Wolter Microscope Scan Geometries

The Wolter microscope includes a number of attractive features for x-ray imaging, and possible connections to laminographic and tomosynthesis 3D object recovery algorithms. This type of instrument employs x-ray optics to sift out single energy x-rays from a broader spectral energy source, and direct those x-rays to a ''focus plane'' similar to the operation of a optical microscope (see Figure 1 for schematic of a Wolter instrument). Unlike optical microscopes the 3D object can be thick in the direction of the x-rays and in this case more of the intensity of the image is affected by the out-of-focus planes, since the ray-paths span the entire depth of the object. It is clear that the ''in-focus'' plane of a Wolter contain more 3D information than a simple ''point-projection'' radiograph. However, it is not clear just how the impact of the out-of-focus planes obscures or distorts features of interest for the in-focus planes. Further, it is not clear just how object positioning can be combined with multiple acquisitions to enable recovery of other planes within the object function or the entire object function. Of particular interest here are Wolter microscopes configured for mesoscale objects (mm extent with um features). Laminographic and tomosynthesis …
Date: October 5, 2004
Creator: Schneberk, D; Jackson, J & Martz, H
Object Type: Report
System: The UNT Digital Library
Final Monitoring Plan for the Utica Aquifer-North Lake Basin Restoration Project at Utica, Nebraska. (open access)

Final Monitoring Plan for the Utica Aquifer-North Lake Basin Restoration Project at Utica, Nebraska.

On March 9, 2001, representatives of the Commodity Credit Corporation of the U.S. Department of Agriculture (CCC/USDA) and Argonne National Laboratory met with representatives from a number of federal and Nebraska state agencies (the wetlands agencies; see Table 1.1) to discuss the CCC/USDA's proposed aquifer remediation and wetlands restoration project at Utica, Nebraska. As part of those discussions, Argonne outlined preliminary recommendations for a long-term monitoring program to verify and document (1) the performance of the spray irrigation treatment process for the removal of carbon tetrachloride from extracted groundwater, (2) the geochemical quality of the extracted and treated groundwater delivered to the wetlands, and (3) the hydrogeologic and inorganic geochemical impacts of the groundwater delivery. General activities recommended included the following: (1) Periodic sampling and analysis for volatile organic compounds (VOCs) in groundwater extracted at each pumping well and in water discharged from the spray irrigation treatment units. (2) Periodic sampling of groundwater from each pumping well and directly from the sprinkler discharge, for analysis for selected inorganic water quality parameters. The CCC/USDA and Argonne also requested at the March 2001 meeting that the wetlands agencies accept responsibility for developing the ecological and biological monitoring programs needed to meet environmental …
Date: October 5, 2005
Creator: LaFreniere, L. M.
Object Type: Report
System: The UNT Digital Library
Fast Ignition Transport Simulations for NIF (open access)

Fast Ignition Transport Simulations for NIF

This paper shows work at Lawrence Livermore National Lab (LLNL) devoted to modeling the propagation of, and heating by, a relativistic electron beam in a idealized dense fuel assembly for fast ignition. The implicit particle-in-cell (PIC) code LSP is used. Experiments planned on the National Ignition Facility (NIF) in the next few years using the Advanced Radiography Capability (ARC) short-pulse laser motivate this work. We demonstrate significant improvement in the heating of dense fuel due to magnetic forces, increased beam collimation, and insertion of a finite-radius carbon region between the beam excitation and fuel regions.
Date: October 5, 2009
Creator: Strozzi, D J; Grote, D P; Tabak, M; Cohen, B I; Town, R P & Kemp, A J
Object Type: Article
System: The UNT Digital Library
CRADA Final Report CRADA No. LB05-001820"Ion Beam Drift Compression Technology for NDCX" (open access)

CRADA Final Report CRADA No. LB05-001820"Ion Beam Drift Compression Technology for NDCX"

Summary of the specific research and project accomplishments: Through this collaboration, LBNL and FPSI determined the specific energy manipulations that apply to the Neutralized Drift Compression Experiment (NDCX) ion beam and developed the preliminary design of a Fast Induction Energy Corrector (FIEC). This effort was successfully completed, firmly establishing the technical feasibility of the proposed approach for regulating the longitudinal energy distribution of the NDCX ion beam. This is a critical step in achieving the NDCX goal of axial compression of the beam by a factor of 100 during neutralized drift.
Date: October 5, 2009
Creator: First point Scientific, Inc.; Laboratory, E.O. Lawrence Berkeley National & Waldron, William L.
Object Type: Report
System: The UNT Digital Library
Nuisance Source Population Modeling for Radiation Detection System Analysis (open access)

Nuisance Source Population Modeling for Radiation Detection System Analysis

A major challenge facing the prospective deployment of radiation detection systems for homeland security applications is the discrimination of radiological or nuclear 'threat sources' from radioactive, but benign, 'nuisance sources'. Common examples of such nuisance sources include naturally occurring radioactive material (NORM), medical patients who have received radioactive drugs for either diagnostics or treatment, and industrial sources. A sensitive detector that cannot distinguish between 'threat' and 'benign' classes will generate false positives which, if sufficiently frequent, will preclude it from being operationally deployed. In this report, we describe a first-principles physics-based modeling approach that is used to approximate the physical properties and corresponding gamma ray spectral signatures of real nuisance sources. Specific models are proposed for the three nuisance source classes - NORM, medical and industrial. The models can be validated against measured data - that is, energy spectra generated with the model can be compared to actual nuisance source data. We show by example how this is done for NORM and medical sources, using data sets obtained from spectroscopic detector deployments for cargo container screening and urban area traffic screening, respectively. In addition to capturing the range of radioactive signatures of individual nuisance sources, a nuisance source population model …
Date: October 5, 2009
Creator: Sokkappa, P; Lange, D; Nelson, K & Wheeler, R
Object Type: Report
System: The UNT Digital Library
KEY FACTORS THAT INFLUENCE THE PERFORMANCE PROPERTIES OF ARP/MCU SALTSTONE MIXES (open access)

KEY FACTORS THAT INFLUENCE THE PERFORMANCE PROPERTIES OF ARP/MCU SALTSTONE MIXES

At the Saltstone Production Facility (SPF), decontaminated salt solution (DSS) is combined with premix (a cementitious mixture of portland cement (PC), blast furnace slag (BFS) and Class F fly ash (FA)) in a Readco mixer to produce fresh (uncured) Saltstone. After transfer to the Saltstone Disposal Facility (SDF) the hydration reactions initiated during the contact of the premix and salt solution continue during the curing period to produce the hardened waste form product. The amount of heat generated from hydration and the resultant temperature increase in the vaults depend on the composition of the decontaminated salt solution being dispositioned as well as the grout formulation (mix design). This report details the results from Task 3 of the Saltstone Variability Study for FY09 which was performed to identify, and quantify when possible, those factors that drive the performance properties of the projected ARP/MCU Batches. A baseline ARP/MCU mix (at 0.60 water to cementitious materials (w/cm) ratio) was established and consisted of the normal premix composition and a salt solution that was an average of the projected compositions of the last three ARP/MCU batches developed by T. A. Le. This task introduced significant variation in (1) wt % slag, w/cm ratio, and …
Date: October 5, 2009
Creator: Harbour, J.; Edwards, T. & Williams, V.
Object Type: Report
System: The UNT Digital Library
Transition Plan for the K-1203 Sewage Treatment Plant, East Tennessee Technology Park, Oak Ridge, Tennessee (open access)

Transition Plan for the K-1203 Sewage Treatment Plant, East Tennessee Technology Park, Oak Ridge, Tennessee

The K-1203 Sewage Treatment Plant (STP) was previously used to treat and process all sanitary sewage waste from the East Tennessee Technology Park (ETTP). The plant was shut down on May 29, 2008 as a result of the transition of sewage treatment for ETTP to the City of Oak Ridge. The City of Oak Ridge expanded the Rarity Ridge Sewage Treatment Plant (RRSTP) to include capacity to treat the waste from the ETTP and the Community Reuse Organization of East Tennessee (CROET) constructed a new ETTP lift station and force main to RRSTP. In preparation for the shutdown of K-1203, the US Department of Energy (DOE) in conjunction with Operation Management International (OMI) developed a shut down plan to outline actions that need to occur prior to the transition of the facility to Bechtel Jacob Company, LLC (BJC) for decontamination and demolition (D and D). This plan outlines the actions, roles, and responsibilities for BJC in order to support the transition of the K-1203 STP from OMI to the BJC Surveillance and Maintenance (S and M) and D and D programs. The D and D of the K-1203 Facilities is planned under the Comprehensive Environmental Response, Compensation, and Liability Act …
Date: October 5, 2008
Creator: J., Hoffmeister
Object Type: Report
System: The UNT Digital Library
Tracking the Sun II: The Installed Cost of Photovoltaics in the U.S. from 1998-2008 (open access)

Tracking the Sun II: The Installed Cost of Photovoltaics in the U.S. from 1998-2008

Installations of solar photovoltaic (PV) systems have been growing at a rapid pace in recent years. In 2008, 5,948 MW of PV was installed globally, up from 2,826 MW in 2007, and was dominated by grid-connected applications. The United States was the world's third largest PV market in terms of annual capacity additions in 2008, behind Spain and Germany; 335 MW of PV was added in the U.S. in 2008, 293 MW of which came in the form of grid-connected installations. Despite the significant year-on-year growth, however, the share of global and U.S. electricity supply met with PV remains small, and annual PV additions are currently modest in the context of the overall electric system. The market for PV in the U.S. is driven by national, state, and local government incentives, including up-front cash rebates, production-based incentives, requirements that electricity suppliers purchase a certain amount of solar energy, and Federal and state tax benefits. These programs are, in part, motivated by the popular appeal of solar energy, and by the positive attributes of PV - modest environmental impacts, avoidance of fuel price risks, coincidence with peak electrical demand, and the location of PV at the point of use. Given the …
Date: October 5, 2009
Creator: Barbose, Galen L.; Wiser, Ryan; Peterman, Carla & Darghouth, Naim
Object Type: Report
System: The UNT Digital Library