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Strategic Petroleum Reserve: Improving the Cost-Effectiveness of Filling the Reserve (open access)

Strategic Petroleum Reserve: Improving the Cost-Effectiveness of Filling the Reserve

Testimony issued by the Government Accountability Office with an abstract that begins "The Strategic Petroleum Reserve (SPR) was created in 1975 to help protect the U.S. economy from oil supply disruptions and currently holds about 700 million barrels of crude oil. The Energy Policy Act of 2005 directed the Department of Energy (DOE) to increase the SPR storage capacity from 727 million barrels to 1 billion barrels, which it plans to accomplish by 2018. Since 1999, oil for the SPR has generally been obtained through the royalty-in-kind program, whereby the government receives oil instead of cash for payment of royalties on leases of federal property. The Department of Interior's Minerals Management Service (MMS) collects the royalty oil and transfers it to DOE, which then trades it for oil suitable for the SPR. As DOE begins to expand the SPR, past experiences can help inform future efforts to fill the reserve in the most cost-effective manner. In that context, GAO's testimony today will focus on: (1) factors GAO recommends DOE consider when filling the SPR, and (2) the cost-effectiveness of using oil received through the royalty-in-kind program to fill the SPR. To address these issues, GAO relied on its 2006 report …
Date: April 24, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Government Performance: Lessons Learned for the Next Administration on Using Performance Information to Improve Results (open access)

Government Performance: Lessons Learned for the Next Administration on Using Performance Information to Improve Results

Testimony issued by the Government Accountability Office with an abstract that begins "Over the past 15 years, legislative and executive branch reform efforts have attempted to shift the focus of federal government management from a preoccupation with activities to the results or outcomes of those activities. Based on over a decade of work in this area, GAO has found a transformation in the capacity of the federal government to manage for results, including an infrastructure of outcome-oriented strategic plans, performance measures, and accountability reporting that provides a solid foundation for improving the performance of federal programs. However, agencies have made less progress in getting their managers' to use performance information in their decision making. GAO was asked to testify on the preliminary results of ongoing work looking at (1) trends in federal managers' use of performance information to manage, both governmentwide and at the agency level; (2) how agencies can encourage greater use of performance information to improve results; and (3) lessons learned from prior management reforms for the next administration. Our statement is based on prior GAO reports and surveys we conducted in 1997, 2000, 2003, and 2007. For the results of our 2007 survey, see e-supplement GAO-08-1036SP. GAO …
Date: July 24, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Residential Facilities: State and Federal Oversight Gaps May Increase Risk to Youth Well-Being (open access)

Residential Facilities: State and Federal Oversight Gaps May Increase Risk to Youth Well-Being

Testimony issued by the Government Accountability Office with an abstract that begins "Nationwide, federal funding to states supported more than 200,000 youth in facilities seeking help for behavioral or emotional challenges in 2004. Recent federal reviews and investigations highlighted maltreatment in some facilities, resulting in hospitalizations and deaths. This testimony discusses (1) what is known about incidents that adversely affect youth well-being in residential facilities, (2) the extent that state oversight ensures youth well-being in these facilities, and (3) the factors that affect the ability of federal agencies to hold states accountable for youth well-being in residential facilities. This testimony is based on GAO's ongoing work, which included national surveys to state agencies of child welfare, health and mental health, and juvenile justice for the year 2006. GAO achieved an 85 percent response rate for each of the three surveys. The work also included site visits to four states (California, Florida, Maryland, and Utah) and discussions with the Departments of Education (Education), Justice (DOJ), and Health and Human Services (HHS). Interim work related to this testimony was completed between November 2006 and March 2008, in accordance with generally accepted government auditing standards."
Date: April 24, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
United Nations: Management Reforms and Operational Issues (open access)

United Nations: Management Reforms and Operational Issues

Testimony issued by the Government Accountability Office with an abstract that begins "Longstanding problems in United Nations (UN) management underscore the pressing need to reform and modernize the United Nations in areas ranging from management, oversight, and accountability to operational activities in specific countries. The United States has strongly advocated the reform of UN management practices and has also been critical of the restrictions Burma's military regime has imposed on many international organizations in Burma over the past 3 years. This testimony, based on recent GAO reports, discusses (1) management reform efforts at the UN Secretariat since 2006; (2) oversight and accountability in selected UN organizations; and (3) UN and other international organizations' activities in Burma."
Date: January 24, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Cayman Islands: Business Advantages and Tax Minimization Attract U.S. Persons and Enforcement Challenges Exist (open access)

Cayman Islands: Business Advantages and Tax Minimization Attract U.S. Persons and Enforcement Challenges Exist

Testimony issued by the Government Accountability Office with an abstract that begins "The Cayman Islands is a major offshore financial center and the registered home of thousands of corporations and financial entities. Financial activity there is in the trillions of dollars annually. One Cayman building--Ugland House--has been the subject of public attention as the listed address of thousands of companies. To help Congress better understand the nature of U.S. persons' business activities in the Cayman Islands, GAO was asked to study (1) the nature and extent of U.S. persons' involvement with Ugland House registered entities and the nature of such business; (2) the reasons why U.S. persons conduct business in the Cayman Islands; (3) information available to the U.S. government regarding U.S. persons' Cayman activities; and (4) the U.S. government's compliance and enforcement efforts. GAO interviewed U.S. and Cayman government officials and representatives of the law firm housed in Ugland House, and reviewed relevant documents. The full report on GAO's review is GAO-08-778, being released at the same time as this testimony."
Date: July 24, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Nanotechnology: Accuracy of Data on Federally Funded Environmental, Health, and Safety Research Could Be Improved (open access)

Nanotechnology: Accuracy of Data on Federally Funded Environmental, Health, and Safety Research Could Be Improved

Testimony issued by the Government Accountability Office with an abstract that begins "In March 2008, GAO issued a report entitled Nanotechnology: Better Guidance Is Needed to Ensure Accurate Reporting of Federal Research Focused on Environmental, Health, and Safety Risks (GAO-08-402). In this report, GAO reviewed the National Nanotechnology Initiative (NNI), a multiagency effort administered by the Office of Science and Technology Policy (OSTP). The NNI coordinates the nanotechnology-related activities of 25 federal agencies that fund nanoscale research or have a stake in the results. A key research area funded by some agencies related to studying the potential environmental, health, and safety (EHS) risks that may result from exposure to nanoscale materials. For this testimony statement, GAO was asked to summarize the findings of its March 2008 report, focusing on (1) the extent to which selected agencies conducted EHS research in fiscal year 2006; (2) the reasonableness of the agencies' and the NNI's processes to identify and prioritize EHS research; and (3) the effectiveness of the agencies' and the NNI's process to coordinate EHS research."
Date: April 24, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Wildlife Refuges: Trends in Funding, Staffing, Habitat Management, and Visitor Services for Fiscal Years 2002 through 2007 (open access)

Wildlife Refuges: Trends in Funding, Staffing, Habitat Management, and Visitor Services for Fiscal Years 2002 through 2007

Testimony issued by the Government Accountability Office with an abstract that begins "The National Wildlife Refuge System, which is administered by the Fish and Wildlife Service in the Department of the Interior, comprises 585 refuges on more than 96 million acres of land and water that preserve habitat for waterfowl and other migratory birds, threatened and endangered species, and other wildlife. Refuges also provide wildlife-related activities such as hunting and fishing to about 40 million visitors every year. GAO was asked to testify on a report that is being released today, Wildlife Refuges: Changes in Funding, Staffing, and Other Factors Create Concerns about Future Sustainability (GAO-08-797), which (1) describes changing factors that the refuge system experienced from fiscal years 2002 through 2007, including funding and staffing changes, and (2) examines how habitat management and visitor services changed during this period. For this report, GAO surveyed all refuges, visited 19 refuges in four regions, and interviewed refuge, regional, and national officials."
Date: September 24, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Commercial Drivers: Certification Process for Drivers with Serious Medical Conditions (open access)

Commercial Drivers: Certification Process for Drivers with Serious Medical Conditions

Testimony issued by the Government Accountability Office with an abstract that begins "Millions of drivers hold commercial driver licenses (CDL), allowing them to operate commercial vehicles. The Department of Transportation (DOT) established regulations requiring medical examiners to certify that these drivers are medically fit to operate their vehicles and provides oversight of their implementation. Little is known on the extent to which individuals with serious medical conditions hold CDLs. Because the effectiveness of the medical certification process is not known, this testimony, and the accompanying report (GAO-08-826) that GAO is releasing today focuses on (1) GAO's analyses of the magnitude of commercial drivers with serious medical conditions, and (2) examples of cases where careful medical examinations did not occur on commercial drivers with serious medical conditions. To examine the extent individuals holding CDLs have significant disabilities, GAO identified those who were in both DOT's CDL database and selected disability databases of Social Security Administration, Office of Personnel Management, and Departments of Veterans Affairs and Labor and have been identified as 100 percent disabled according to the program's criteria. GAO obtained current CDL data from 12 selected states. To provide case studies, GAO focused on 4 states--Florida, Maryland, Minnesota, and Virginia. …
Date: July 24, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Residential Programs: Selected Cases of Death, Abuse, and Deceptive Marketing (open access)

Residential Programs: Selected Cases of Death, Abuse, and Deceptive Marketing

Testimony issued by the Government Accountability Office with an abstract that begins "In October 2007, GAO testified before the Committee regarding allegations of abuse and death in private residential programs across the country such as wilderness therapy programs, boot camps, and boarding schools. GAO also examined selected closed cases where a youth died while enrolled in one of these private programs. Many cite positive outcomes associated with specific types of residential programs. However, due to continuing concerns about the safety and well-being of youth enrolled in private programs, the Committee requested that GAO (1) identify and examine the facts and circumstances surrounding additional closed cases where a teenager died, was abused, or both, while enrolled in a private program; and (2) identify cases of deceptive marketing or questionable practices in the private residential program industry. To develop case studies of death and abuse, GAO conducted numerous interviews and examined documents from eight closed cases from 1994 to 2006. GAO used covert testing along with other investigative techniques to identify, for selected cases, deceptive marketing or questionable practices. Specifically, posing as fictitious parents with fictitious troubled teenagers, GAO called 14 programs and related services. GAO did not attempt to evaluate the …
Date: April 24, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Capitol Visitor Center: Update on Status of Project's Schedule and Cost as of September 24, 2008 (open access)

Capitol Visitor Center: Update on Status of Project's Schedule and Cost as of September 24, 2008

Testimony issued by the Government Accountability Office with an abstract that begins "The purpose of this testimony is to assist the Subcommittee in monitoring progress on the Capitol Visitor Center (CVC) project. This testimony will focus on (1) the Architect of the Capitol's (AOC) construction progress since the last CVC hearing on July 8, 2008, and (2) the project's expected cost at completion and funding status."
Date: September 24, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Export Controls: State and Commerce Have Not Taken Basic Steps to Better Ensure U.S. Interests Are Protected (open access)

Export Controls: State and Commerce Have Not Taken Basic Steps to Better Ensure U.S. Interests Are Protected

Testimony issued by the Government Accountability Office with an abstract that begins "In controlling the transfer of weapons and related technologies overseas, the U.S. government must limit the possibility of sensitive items falling into the wrong hands while allowing legitimate trade to occur. Achieving this balance has become more challenging due to redefined security threats and a globalized economy. The export control system is a key component of the safety net of programs intended to balance multiple U.S. interests. The export control system is managed primarily by the State Department, which regulates arms exports, and the Commerce Department, which regulates dual-use exports that have military and civilian applications. Unless an exemption applies, arms exports require licenses, while many dual-use exports do not require licenses. Based on GAO's extensive body of work on the export control system, this testimony focuses on export licensing inefficiencies, poor interagency coordination, and limits in State's and Commerce's ability to provide a sound basis for changes to the system. In prior work, GAO made recommendations to address vulnerabilities in the export control system, but many have not been implemented. Because of these vulnerabilities and others identified in the larger safety net of programs, GAO has designated …
Date: April 24, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Aviation Security: Transportation Security Administration Has Strengthened Planning to Guide Investments in Key Aviation Security Programs, but More Work Remains (open access)

Aviation Security: Transportation Security Administration Has Strengthened Planning to Guide Investments in Key Aviation Security Programs, but More Work Remains

Testimony issued by the Government Accountability Office with an abstract that begins "Since its inception in November 2001, the Transportation Security Administration (TSA) has focused much of its efforts on aviation security, and has developed and implemented a variety of programs and procedures to secure the commercial aviation system. TSA funding for aviation security has totaled about $26 billion since fiscal year 2004. This testimony focuses on TSA's efforts to secure the commercial aviation system through passenger screening, strengthening air cargo security, and watch-list matching programs, as well as challenges that remain. It also addresses crosscutting issues that have impeded TSA's efforts in strengthening security. This testimony is based on GAO reports and testimonies issued from February 2004 through July 2008 including selected updates obtained from TSA officials in June and July 2008."
Date: July 24, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
The Upcoming Transition: GAO's Efforts to Assist the 111th Congress and the Next Administration (open access)

The Upcoming Transition: GAO's Efforts to Assist the 111th Congress and the Next Administration

Testimony issued by the Government Accountability Office with an abstract that begins "The upcoming 2009 transition will be a unique and critical period for the U.S. government. It marks the first wartime presidential transition in 40 years. It will also be the first administration change for the relatively new Department of Homeland Security operating in the post 9/11 environment. The next administration will fill thousands of positions across government; there will be a number of new faces in Congress as well. Making these transitions as seamlessly as possible is pivotal to effectively and efficiently help accomplish the federal government's many essential missions. While the Government Accountability Office (GAO), as a legislative branch agency, has extensive experience helping each new Congress, the Presidential Transition Act points to GAO as a resource to incoming administrations as well. The Act specifically identifies GAO as a source of briefings and other materials to help presidential appointees make the leap from campaigning to governing by informing them of the major management issues, risks, and challenges they will face. GAO has traditionally played an important role as a resource for new Congresses and administrations, providing insight into the issues where GAO has done work. This testimony …
Date: September 24, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Cayman Islands: Review of Cayman Islands and U.S. Laws Applicable to U.S. Persons' Financial Activity in the Cayman Islands, (GAO-08-1028SP), an E-supplement to GAO-08-778, July 2008 (open access)

Cayman Islands: Review of Cayman Islands and U.S. Laws Applicable to U.S. Persons' Financial Activity in the Cayman Islands, (GAO-08-1028SP), an E-supplement to GAO-08-778, July 2008

Other written product issued by the Government Accountability Office with an abstract that begins "This is an E-supplement to GAO-08-778. The Cayman Islands is a major center for financial activity and entities such as corporations, partnerships, and trusts can all play roles in those activities. U.S. taxpayers have a range of relationships to those entities, including as owners, as investors, as partners, and as beneficiaries of trusts. The activities of Cayman Islands entities can have tax consequences for under U.S. law. To understand more about the nature of financial activity in the Cayman Islands and its consequences under U.S. tax law, we examined relevant portions of Cayman Islands and U.S. law. This supplement discusses four areas of Cayman Islands and U.S. law. Part I is an overview of Cayman Islands law governing corporations, partnerships, and trusts. It also discusses the function of the registered office under Cayman Islands law. Part II presents an overview of Cayman Islands law governing the sharing of information by the Cayman Islands government with the U.S. government. Part III discusses certain Cayman Islands monetary authority and anti-money-laundering laws and compares specific Cayman Islands and United States regulations designed to combat money laundering. Finally, Part IV …
Date: July 24, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Information Technology: DOD and VA Have Increased Their Sharing of Health Information, but Further Actions Are Needed (open access)

Information Technology: DOD and VA Have Increased Their Sharing of Health Information, but Further Actions Are Needed

Testimony issued by the Government Accountability Office with an abstract that begins "The National Defense Authorization Act for Fiscal Year 2008 required the Department of Defense (DOD) and the Department of Veterans Affairs (VA) to accelerate the exchange of health information between the departments and to develop systems or capabilities that allow for full interoperability (generally, the ability of systems to use data that are exchanged) and that are compliant with federal standards. The act also established an interagency program office to function as a single point of accountability for the effort and whose role is to implement such systems or capabilities by September 30, 2009. Further, the act required that GAO semi-annually report on the progress made in achieving these goals; its first report was issued in July 2008. In that report, GAO described the departments' progress in sharing electronic health information, developing electronic health records that comply with federal standards, and establishing the interagency program office. In this testimony, GAO discusses its July 2008 report and updated information obtained from the departments."
Date: September 24, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
International Boundary and Water Commission: Two Alternatives for Improving Wastewater Treatment at the United States-Mexico Border (open access)

International Boundary and Water Commission: Two Alternatives for Improving Wastewater Treatment at the United States-Mexico Border

Correspondence issued by the Government Accountability Office with an abstract that begins "For many years, untreated wastewater originating in Tijuana, Mexico, has entered the United States, largely via the Tijuana River. Tijuana's sewage system does not have the capacity to treat all of the city's wastewater, and some areas of the city are not connected to the sewer system. Tijuana's higher elevation results in sewage flowing downhill into California and out to the Pacific Ocean, causing beach closures in southern California. In the 1990s, the U.S. and Mexican Sections of the International Boundary and Water Commission collaborated with the U.S. Environmental Protection Agency (EPA) to address the problem by constructing the South Bay International Wastewater Treatment Plant (SBIWTP) in San Ysidro, California. The SBIWTP began providing the first level of treatment, known as primary treatment, to 25 million gallons per day (mgd) of Mexican wastewater in 1997. However, the part of the facility that would have provided secondary treatment, allowing the wastewater to meet Clean Water Act (CWA) standards for discharge into the Pacific Ocean, was not constructed due to a lack of funding and legal challenges. As a result, water discharged from the SBIWTP is only partially treated and …
Date: April 24, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Agencies Believe Strengthening International Agreements to Improve Collection of Antidumping and Countervailing Duties Would Be Difficult and Ineffective (open access)

Agencies Believe Strengthening International Agreements to Improve Collection of Antidumping and Countervailing Duties Would Be Difficult and Ineffective

Correspondence issued by the Government Accountability Office with an abstract that begins "The United States and many of its trading partners have enacted laws to remedy the unfair trade practices of other countries and foreign companies that cause injury to domestic industries. U.S. law authorizes the imposition of additional duties on importers to remedy these unfair trade practices. Specifically, antidumping (AD) duties are imposed on imports that are "dumped" in the United States (i.e., sales in the U.S. market at less than the market price in the item's home market) and countervailing (CV) duties are imposed on imports that are subsidized by foreign governments. Importers are responsible for paying all duties, taxes, and fees on products when they are brought into the United States (including AD/CV duties). Importers can be located either domestically or overseas. Since fiscal year 2001, U.S. Customs and Border Protection (CBP), which is responsible for collecting import duties, has been unable to collect hundreds of millions of dollars in AD/CV duties. In March 2008, we reported that over $600 million in AD/CV duties were uncollected. Our analysis revealed four key factors contributing to uncollected AD/CV duties: (1) the retrospective component of the U.S. AD/CV duty system, …
Date: July 24, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Optimizing the User Experience in a Rapid Development Framework: Functional Requirements for The Portal to Texas History (open access)

Optimizing the User Experience in a Rapid Development Framework: Functional Requirements for The Portal to Texas History

This report includes the results of an initial assessment of genealogists' requirements for the redesign of the Portal's interface. The UNT Libraries received a National Leadership Grant from the Institute of Museum and Library Services for a two-year project to identify the user interface requirements of genealogists interacting with the libraries' Portal to Texas History. The IOGENE project involves genealogists in the design process beginning with the initial assessment of their requirements and continuing through usability testing of the redesigned Portal interface.
Date: July 24, 2008
Creator: Murray, Kathleen R.
Object Type: Report
System: The UNT Digital Library
Proposed Colombia Free Trade Agreement: Labor Issues (open access)

Proposed Colombia Free Trade Agreement: Labor Issues

This report examines three labor issues and arguments related to the pending U.S.-Colombia free trade agreement (CFTA): violence against trade unionists; impunity (accountability for or punishment of the perpetrators); and worker rights protections for Colombians. This report addresses this issue at length, including the arguments for and against the agreement, as well as general U.S.-Colombia economic relations.
Date: November 24, 2008
Creator: Bolle, Mary Jane
Object Type: Report
System: The UNT Digital Library
U.S. National Science Foundation: An Overview (open access)

U.S. National Science Foundation: An Overview

The majority of the research supported by the NSF is conducted at U.S. colleges and universities. Approximately 82.7% ($3,094.8 million) of NSF's FY2006 $3,740.6 million research and development (R&D) budget was awarded to U.S. colleges and universities. On September 30, 2008, the President signed into law the Consolidated Security, Disaster Assistance, and Continuing Appropriations Act, 2009 (P.L. 110-329, H.R. 2638). The act includes, among other things, three of the 12 regular appropriations acts for FY2009. The Continuing Appropriations Act funds the NSF until passage of the Commerce, Justice, Science, and Related Appropriations bill or until March 6, 2009, whichever occurs first. P.L. 110-329 funds the NSF at the FY2008 level.
Date: October 24, 2008
Creator: Matthews, Christine M.
Object Type: Report
System: The UNT Digital Library
Immigration: The Effects on Low-Skilled and High-Skilled Native-Born Workers (open access)

Immigration: The Effects on Low-Skilled and High-Skilled Native-Born Workers

The report opens with a discussion of how to analyze the impact of immigrants on the pay and job opportunities of native-born workers. It then uses this framework to examine and interpret the empirical literature on the subject. The report concludes with a discussion of policy implications.
Date: January 24, 2008
Creator: Levine, Linda
Object Type: Report
System: The UNT Digital Library
Sigma: Web Retrieval Interface for Nuclear Reaction Data (open access)

Sigma: Web Retrieval Interface for Nuclear Reaction Data

The authors present Sigma, a Web-rich application which provides user-friendly access in processing and plotting of the evaluated and experimental nuclear reaction data stored in the ENDF-6 and EXFOR formats. The main interface includes browsing using a periodic table and a directory tree, basic and advanced search capabilities, interactive plots of cross sections, angular distributions and spectra, comparisons between evaluated and experimental data, computations between different cross section sets. Interactive energy-angle, neutron cross section uncertainties plots and visualization of covariance matrices are under development. Sigma is publicly available at the National Nuclear Data Center website at www.nndc.bnl.gov/sigma.
Date: June 24, 2008
Creator: Pritychenko,B. & Sonzogni, A.A.
Object Type: Article
System: The UNT Digital Library
Long-range and head-on beam-beam compensation studies in RHIC with lessons for the LHC (open access)

Long-range and head-on beam-beam compensation studies in RHIC with lessons for the LHC

Long-range as well as head-on beam-beam effects are expected to limit the LHC performance with design parameters. They are also important consideration for the LHC upgrades. To mitigate long-range effects current carrying wires parallel to the beam were proposed. Two such wires are installed in RHIC where they allow studying the effect of strong long-range beam-beam effects, as well as the compensation of a single long-range interaction. The tests provide benchmark data for simulations and analytical treatments. To reduce the head-on beam-beam effect electron lenses were proposed for both RIDC and the LHC. We present the experimental long-range beam-beam program at RHIC and report on head-on compensations studies based on simulations.
Date: November 24, 2008
Creator: Fischer, W.; Luo, Y.; Abreu, N.; Calaga, R.; Montag, C.; Robert-Demolaize, G. et al.
Object Type: Article
System: The UNT Digital Library
Emittance and Current of Electrons Trapped in a Plasma Wakefield Accelerator (open access)

Emittance and Current of Electrons Trapped in a Plasma Wakefield Accelerator

In recent experiments plasma electrons became trapped in a plasma wakefield accelerator (PWFA). The transverse size of these trapped electrons on a downstream diagnostic yields an upper limit measurement of transverse normalized emittance divided by peak current, {var_epsilon}{sub N,x}/I. The lowest upper limit for {var_epsilon}{sub N,x}/I measured in the experiment is 1.3 {center_dot} 10{sup -10} m/A.
Date: September 24, 2008
Creator: Kirby, N.; Blumenfeld, I.; Clayton, C. E.; Decker, F. J.; Hogan, M. J.; Huang, C. et al.
Object Type: Article
System: The UNT Digital Library