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Edge Turbulence Velocity Changes with Lithium Coating on NSTX
Lithium coating improves energy confinement and eliminates edge localized modes in NSTX, but the mechanism of this improvement is not yet well understood. We used the gas-puff-imaging (GPI) diagnostic on NSTX to measure the changes in edge turbulence which occurred during a scan with variable lithium wall coating, in order to help understand the reason for the confinement improvement with lithium. There was a small increase in the edge turbulence poloidal velocity and a decrease in the poloidal velocity fluctuation level with increased lithium. The possible effect of varying edge neutral density on turbulence damping was evaluated for these cases in NSTX. __________________________________________________
Date:
August 10, 2012
Creator:
A. Cao, S.J. Zweben, D.P. Stotler, M. Bell, A. Diallo, S.M. Kaye and B. LeBlanc
System:
The UNT Digital Library
Potential for luminosity improvement for low-energy RHIC operation with long bunches
Electron cooling was proposed to increase luminosity of the RHIC collider for heavy ion beams at low energies. Luminosity decreases as the square of bunch intensity due to the beam loss from the RF bucket as a result of the longitudinal intra beam scattering (IBS), as well as due to the transverse emittance growth because of the transverse IBS. Both transverse and longitudinal IBS can be counteracted with electron cooling. This would allow one to keep the initial peak luminosity close to constant throughout the store essentially without the beam loss. In addition, the phase-space density of the hadron beams can be further increased by providing stronger electron cooling. Unfortunately, the defining limitation for low energies in RHIC is expected to be the space charge. Here we explore an idea of additional improvement in luminosity, on top of the one coming from just IBS compensation and longer stores, which may be expected if one can operate with longer bunches at the space-charge limit in a collider. This approach together with electron cooling may result in about 10-fold improvement in total luminosity for low-energy RHIC program.
Date:
February 10, 2012
Creator:
A., Fedotov; Blaskiewicz, & M.
System:
The UNT Digital Library
LITERATURE REVIEW ON IMPACT OF GLYCOLATE ON THE 2H EVAPORATOR AND THE EFFLUENT TREATMENT FACILITY
Glycolic acid (GA) is being studied as an alternate reductant in the Defense Waste Processing Facility (DWPF) feed preparation process. It will either be a total or partial replacement for the formic acid that is currently used. A literature review has been conducted on the impact of glycolate on two post-DWPF downstream systems - the 2H Evaporator system and the Effluent Treatment Facility (ETF). The DWPF recycle stream serves as a portion of the feed to the 2H Evaporator. Glycolate enters the evaporator system from the glycolate in the recycle stream. The overhead (i.e., condensed phase) from the 2H Evaporator serves as a portion of the feed to the ETF. The literature search revealed that virtually no impact is anticipated for the 2H Evaporator. Glycolate may help reduce scale formation in the evaporator due to its high complexing ability. The drawback of the solubilizing ability is the potential impact on the criticality analysis of the 2H Evaporator system. It is recommended that at least a theoretical evaluation to confirm the finding that no self-propagating violent reactions with nitrate/nitrites will occur should be performed. Similarly, identification of sources of ignition relevant to glycolate and/or update of the composite flammability analysis to …
Date:
May 10, 2012
Creator:
Adu-Wusu, K.
System:
The UNT Digital Library
The Future of the Eurozone and U.S. Interests
Seventeen of the European Union's 27 member states share an economic and monetary union (EMU) with the euro as a single currency. These countries are effectively referred to as the Eurozone. What has become known as the Eurozone crisis began in early 2010 when financial markets were shaken by heightened concerns that the fiscal positions of a number of Eurozone countries, beginning with Greece, were unsustainable. This report provides background information and analysis on the future of the Eurozone in six parts, including discussions on the origins and design challenges of the Eurozone, proposals to define the Eurozone crisis, possible scenarios for the future of the Eurozone, and the implications of the Eurozone crisis for U.S. economic and political interests.
Date:
January 10, 2011
Creator:
Ahearn, Raymond J.; Jackson, James K.; Nelson, Rebecca M. & Weiss, Martin A.
System:
The UNT Digital Library
Does the Endangered Species Act Listing Provide More Protection of the Polar Bear?
None
Date:
November 10, 2010
Creator:
Alexander, Kristina
System:
The UNT Digital Library
Gray Wolves Under the Endangered Species Act: Distinct Population Segments and Experimental Populations
This report analyzes the DPS designation process as it is applied to the gray wolf. It also examines experimental populations of wolves under the ESA and their protections. As part of its oversight responsibilities, Congress has conducted hearings on the Fish and Wildlife Service’s application of science to endangered species.
Date:
August 10, 2010
Creator:
Alexander, Kristina & Corn, M. L.
System:
The UNT Digital Library
Muon Fluence Measurements for Homeland Security Applications
This report focuses on work conducted at Pacific Northwest National Laboratory to better characterize aspects of backgrounds in RPMs deployed for homeland security purposes. Two polyvinyl toluene scintillators were utilized with supporting NIM electronics to measure the muon coincidence rate. Muon spallation is one mechanism by which background neutrons are produced. The measurements performed concentrated on a broad investigation of the dependence of the muon flux on a) variations in solid angle subtended by the detector; b) the detector inclination with the horizontal; c) depth underground; and d) diurnal effects. These tests were conducted inside at Building 318/133, outdoors at Building 331G, and underground at Building 3425 at Pacific Northwest National Laboratory.
Date:
August 10, 2010
Creator:
Ankney, Austin S.; Berguson, Timothy J.; Borgardt, James D. & Kouzes, Richard T.
System:
The UNT Digital Library
Northern Ireland: The Peace Process
This report provides background information regarding political violence and the peace process in Northern Ireland. It includes further information about the devolved government and recurrent crises (1999-2002, 2003-2007 and 2008-2010), implementation of police reforms, recent events and ongoing challenges, relevant U.S. policy, and recent legislation.
Date:
January 10, 2014
Creator:
Archick, Kristin
System:
The UNT Digital Library
U.S.-Nordic Relations
This report briefly discusses U.S. relations with the Nordic countries--Denmark, Finland, Iceland, Norway, and Sweden.
Date:
May 10, 2016
Creator:
Archick, Kristin
System:
The UNT Digital Library
Algeria: Current Issues
This report examines the current state of Algeria, including Algeria's associations with terrorism, the weakening of the Algerian military, and the nation's growing oil revenues.
Date:
February 10, 2011
Creator:
Arieff, Alexis
System:
The UNT Digital Library
Political Transition in Tunisia
This report discusses Tunisia's pro-democracy movement; concerns over potential instability in a previously secure, pro-Western area; and U.S.-Tunisian relations.
Date:
February 10, 2015
Creator:
Arieff, Alexis & Humud, Carla E.
System:
The UNT Digital Library
Reauthorization of SNAP and Other Nutrition Programs in the Next Farm Bill: Issues for the 113th Congress
This report discusses the Nutrition Title (Title IV) of the pending farm bills and elaborates on the most controversial issues and differences between Senate and House proposals. Policies that are not necessarily controversial but are complex are also included in this report.
Date:
December 10, 2013
Creator:
Aussenberg, Randy Alison
System:
The UNT Digital Library
2012 Farm Bill: Changing the Treatment of LIHEAP Receipt in the Calculation of SNAP Benefits
This report describes the contents of the 2012 Farm Bill, cost reducing measures in the Farm Bill, and the implications of both of these. Specifically, the report focuses on SNAP (Supplemental Nutrition Assistance Program) which is a cost saving measure that addresses how certain deductions from income will be calculated.
Date:
July 10, 2012
Creator:
Aussenberg, Randy Alison & Perl, Libby
System:
The UNT Digital Library
The Debt Limit: History and Recent Increases
This report gives an overview of the federal debt limit, its history, and recent increases
Date:
May 10, 2011
Creator:
Austin, D. Andrew
System:
The UNT Digital Library
Running Deficits: Positives and Pitfalls
This report discusses how deficit finance can help governments manage their economies and how large and persistent deficits can lead to severe economic problems.
Date:
March 10, 2010
Creator:
Austin, D. Andrew
System:
The UNT Digital Library
The Debt Limit: History and Recent Increases
This report gives an historical overview of debt limits, discusses how the total debt of the federal government can increase and how the current economic slowdown has led to higher deficits and thereby a series of debt limit increases, as well as legislation related to these increases.
Date:
January 10, 2013
Creator:
Austin, D. Andrew & Levit, Mindy R.
System:
The UNT Digital Library
Trends in Discretionary Spending
Discretionary spending is provided in, and controlled by, annual appropriations acts, which fund many of the routine activities commonly associated with such federal government functions as running executive branch agencies, congressional offices and agencies, and international operations of the government. Essentially all spending on federal wages and salaries is discretionary. This report discusses historical, current, and projected discretionary spending trends. It also describes how current discretionary spending trends reflect national priorities.
Date:
September 10, 2010
Creator:
Austin, D. Andrew & Levit, Mindy R.
System:
The UNT Digital Library
Suicide Prevention Efforts of the Veterans Health Administration
This report discusses seven areas of Veterans Health Administration (VHA) suicide prevention interventions: easy access to care, education, screening and treatment, limited access to lethal means, suicide hotline, media restrictions, and suicide prevention coordinators.
Date:
January 10, 2013
Creator:
Bagalman, Erin
System:
The UNT Digital Library
Proceedings of RIKEN BNL Research Center Workshop: The Physics of p(up arrow)+A Collisions at RHIC
N/A
Date:
January 10, 2013
Creator:
Bai, M.; Goto, Y.; Heppelmann, S.; Jiang, X.; Liu, M.; Makdisi, Y. et al.
System:
The UNT Digital Library
Defense Surplus Equipment Disposal: Background Information
This report discusses the Department of Defense (DOD) policy via the Defense Utilization and Marketing Service (DRMS) for disposing of government equipment and supplies considered surplus or deemed unnecessary to the agency's currently designated mission. The report focuses on DRMS background, as well as the most recent DRMS policy modifications.
Date:
September 10, 2013
Creator:
Bailey Grasso, Valerie
System:
The UNT Digital Library
INDEPENDENT CONFIRMATORY SURVEY REPORT FOR THE REACTOR BUILDING, HOT LABORATORY, PRIMARY PUMP HOUSE, AND LAND AREAS AT THE PLUM BROOK REACTOR FACILITY, SANDUSKY, OHIO
In 1941, the War Department acquired approximately 9,000 acres of land near Sandusky, Ohio and constructed a munitions plant. The Plum Brook Ordnance Works Plant produced munitions, such as TNT, until the end of World War II. Following the war, the land remained idle until the National Advisory Committee for Aeronautics later called the National Aeronautics and Space Administration (NASA) obtained 500 acres to construct a nuclear research reactor designed to study the effects of radiation on materials used in space flight. The research reactor was put into operation in 1961 and was the first of fifteen test facilities eventually built by NASA at the Plum Brook Station. By 1963, NASA had acquired the remaining land at Plum Brook for these additional test facilities
Date:
October 10, 2011
Creator:
Bailey, Erika N.
System:
The UNT Digital Library
Davis v. United States: Retroactivity and the Good-Faith Exception to the Exclusionary Rule
This report contains the exclusionary rule and its good-faith exception, including the opinion of the court and implications for congressional action on Davis v. United States.
Date:
August 10, 2011
Creator:
Barbour, Emily C.
System:
The UNT Digital Library
Overview of the Facility Safeguardability Analysis (FSA) Process
The safeguards system of the International Atomic Energy Agency (IAEA) provides the international community with credible assurance that a State is fulfilling its nonproliferation obligations. The IAEA draws such conclusions from the evaluation of all available information. Effective and cost-efficient IAEA safeguards at the facility level are, and will remain, an important element of this “State-level” approach. Efficiently used, the Safeguards by Design (SBD) methodologies , , , now being developed can contribute to effective and cost-efficient facility-level safeguards. The Facility Safeguardability Assessment (FSA) introduced here supports SBD in three areas. 1. It describes necessary interactions between the IAEA, the State regulator, and the owner / designer of a new or modified facility to determine where SBD efforts can be productively applied, 2. It presents a screening approach intended to identify potential safeguard issues for; a) design changes to existing facilities; b) new facilities similar to existing facilities with approved safeguards approaches, and c) new designs, 3. It identifies resources (the FSA toolkit), such as good practice guides, design guidance, and safeguardability evaluation methods that can be used by the owner/designer to develop solutions for potential safeguards issues during the interactions with the State regulator and IAEA. FSA presents a …
Date:
October 10, 2011
Creator:
Bari, Robert A.; Hockert, John; Wonder, Edward F.; Johnson, Shirley J.; Wigeland, Roald & Zentner, Michael D.
System:
The UNT Digital Library
A NMR-Based Carbon-Type Analysis of Diesel Fuel Blends From Various Sources
In collaboration with participants of the Coordinating Research Council (CRC) Advanced Vehicle/Fuels/Lubricants (AVFL) Committee, and project AVFL-19, the characteristics of fuels from advanced and renewable sources were compared to commercial diesel fuels. The main objective of this study was to highlight similarities and differences among the fuel types, i.e. ULSD, renewables, and alternative fuels, and among fuels within the different fuel types. This report summarizes the carbon-type analysis from 1H and 13C{1H} nuclear magnetic resonance spectroscopy (NMR) of 14 diesel fuel samples. The diesel fuel samples come from diverse sources and include four commercial ultra-low sulfur diesel fuels (ULSD), one gas-to-liquid diesel fuel (GTL), six renewable diesel fuels (RD), two shale oil-derived diesel fuels, and one oil sands-derived diesel fuel. Overall, the fuels examined fall into two groups. The two shale oil-derived samples and the oil-sand-derived sample closely resemble the four commercial ultra-low sulfur diesels, with SO1 and SO2 most closely matched with ULSD1, ULSD2, and ULSD4, and OS1 most closely matched with ULSD3. As might be expected, the renewable diesel fuels, with the exception of RD3, do not resemble the ULSD fuels because of their very low aromatic content, but more closely resemble the gas-to-liquid sample (GTL) in this …
Date:
May 10, 2013
Creator:
Bays, J. Timothy & King, David L.
System:
The UNT Digital Library