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New generation of arc and arc filament power supplies for pulsed neutral beams
The new Tandem Mirror Experiment (TMX) facility at LLL requires that neutral beams operate for pulse lengths between 25 and 100 ms. The inevitable increase in cost over the present 12-ms pulse length capability dictated that a more economical alternative to the pulse forming networks and the transformer-type arc filament power supplies currently in use be found. A study of the various alternatives and design requirements revealed that battery banks are the most economical alternative. The thermionic arc filaments have relatively simple power-supply requirements in terms of control and regulation. The battery arc filament power supply controls and electromechanical hardware heat the filaments to provide the electrons which produce the plasma. Component testing revealed problems that must be addressed in the finished production design. The battery arc power supply poses a difficult set of requirements for current control. The TMX requires current control accuracy of +-1.0 percent and rise/fall times of 50 ..mu..s. These requirements are met with a novel thyristor switching circuit. The features of the four-section battery bank design, capable of a total of 4000 A at 58 V dc, are detailed. Control hardware compatible with the current generation of pulse-forming network hardware has been developed. The cost …
Date:
October 3, 1977
Creator:
Santamaria, G.T.
Object Type:
Article
System:
The UNT Digital Library
50th Anniversary, 1931-1981: symposium and banquet speeches
The proceedings includes talks given at the symposium and the banquet. They include examples of technology at the laboratory and speculation on the future at the laboratory. (GHT)
Date:
October 3, 1981
Creator:
unknown
Object Type:
Article
System:
The UNT Digital Library
Uranium miner lung cancer study. Progress report, July 1, 1976--July 1, 1977
This study was initiated in 1957 by the U.S. Public Health and many facets of this project are reaching final objectives. Many new studies have developed in the course of this study and will continue. The projects supported by the Energy Research and Development Administration are of utmost importance and consist of: collection of material from uranium miners known to have cancer of the lung into a tumor registry; manual on pulmonary cytology; regression study of sputum cytological findings in uranium miners who showed marked atypical squamous cell metaplasia and have quit smoking cigarettes, mining, or both; continuation of sputum collection and collection of lungs from deceased miners; sensory development for localization of carcinoma in situ of the lung; and lung histology program. Since we have examined approximately 77,000 sputum samples over the last 20 years in cases that showed normal cytology at the inception of the study and some subsequently developed carcinoma of the lung, we have an accumulation of material that is worthy of study and presentation.
Date:
October 3, 1977
Creator:
Saccomanno, G.
Object Type:
Report
System:
The UNT Digital Library
Aquifer tests near the Idaho Falls Foothills, Idaho
Ground water pumping tests were performed in two wells located in the foothills east of Idaho Falls to determine the aquifer characteristics at these locations. These data were used to differentiate this aquifer from the Snake River Plain aquifer. The wells were pumped at rates of 11 and 14 gallons per minute with 0.03 and 0.04 ft of drawdown measured in the pumping wells. The transmissivity is estimated to be 525,000 gpd/ft and 450,000 gpd/ft, respectively. The hydraulic conductivity is 925 ft/day and 1,070 ft/day, respectively. These hydraulic conductivities are similar to those measured in the Snake River Plain aquifer. Water level data in these wells are consistent with the water table in the Snake River Plain aquifer and indicates ground water movement from the foothills toward the Plain. The high transmissivity suggests water may move rapidly from the foothills area to mix with water in the Snake River Plain aquifer. Elevated water temperatures (76 and 70{degrees}F) and high specific conductivities in these wells indicate the presence of a foothills aquifer with characteristics that can be used to separate the two aquifer systems.
Date:
October 3, 1991
Creator:
Hubbell, J.M.
Object Type:
Report
System:
The UNT Digital Library
Engineering of beam direct conversion for a 120-kV, 1-MW ion beam
Practical systems for beam direct conversion are required to recover the energy from ion beams at high efficiency and at very high beam power densities in the environment of a high-power, neutral-injection system. Such an experiment is now in progress using a 120-kV beam with a maximum total current of 20 A. After neutralization, the H/sup +/ component to be recovered will have a power of approximately 1 MW. A system testing these concepts has been designed and tested at 15 kV, 2 kW in preparation for the full-power tests. The engineering problems involved in the full-power tests affect electron suppression, gas pumping, voltage holding, diagnostics, and measurement conditions. Planning for future experiments at higher power includes the use of cryopumping and electron suppression by a magnetic field rather than by an electrostatic field. Beam direct conversion for large fusion experiments and reactors will save millions of dollars in the cost of power supplies and electricity and will dispose of the charged beam under conditions that may not be possible by other techniques.
Date:
October 3, 1977
Creator:
Barr, W. L.; Doggett, J. N.; Hamilton, G. W.; Kinney, J. D. & Moir, R. W.
Object Type:
Article
System:
The UNT Digital Library
Acceleration systems for heavy-ion beams for inertial confinement fusion
The requirements for a heavy-ion demonstration experiment to achieve useful electric power generation through inertial confinement fusion are discussed. (MOW)
Date:
October 3, 1977
Creator:
Faltens, A.; Judd, D.L. & Keefe, D.
Object Type:
Article
System:
The UNT Digital Library
Oil and Gas Leasing: Interior Could Do More to Encourage Diligent Development
A letter report issued by the Government Accountability Office with an abstract that begins "In 2007, the Department of the Interior (Interior) collected about $10.5 billion in revenues from companies that hold federal oil and gas leases. Interior's Minerals Management Service manages offshore leases, while its Bureau of Land Management manages onshore leases and leases in the National Petroleum Reserve in Alaska. Acquiring a federal lease gives the lessee the rights to explore for and develop the oil and gas resources under the lease. Development entails many tasks, including drilling wells and building pipelines that may lead to oil and gas production. GAO agreed to (1)describe Interior's efforts to encourage development of federal oil and gas leases and compare them to states' and private landowners' efforts, (2)examine trends in leasing and factors that may affect development, and (3) describe development on a sample of leases. GAO reviewed data on about 55,000 leases and spoke to officials at Interior and in eight states with leasing experience, among others."
Date:
October 3, 2008
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Highway Safety: Foresight Issues Challenge DOT's Efforts to Assess and Respond to New Technology-Based Trends
A letter report issued by the Government Accountability Office with an abstract that begins "Fatalities on U.S. roads now total over 40,000 each year. Future reductions may require the Department of Transportation (DOT) to address new trends such as evolving crash-avoidance technologies and rapidly changing electronic devices that may distract drivers who use them on the road. (See figure.) GAO was asked to examine how DOT is addressing fast-moving trends such as these. This report examines how DOT is (1) deciding on responses to the crash avoidance and electronic distractions trends--given available evidence and uncertainties; (2) developing new evidence on these trends' safety impacts; and (3) communicating with the Congress about these and other trends and related issues. To conduct this study, GAO analyzed DOT reports, peer-reviewed literature, and other documents; interviewed DOT officials and staff; and interviewed over 30 experts."
Date:
October 3, 2008
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Questions for Competitive Sourcing Hearing Record
Correspondence issued by the General Accounting Office with an abstract that begins "The Subcommittee on Oversight of Government Management, the Federal Workforce, and the District of Columbia, Senate Committee on Governmental Affairs requested GAO's views on various competitive sourcing issies, including the recent revisions made by the Office of Management and Budget (OMB) to its Circular A-76. GAO answered questions on (1) making "best value" instead of "lowest cost" the factor that agencies must use in determining who will win a public-private competition; (2) agencies' capability to effectively manage public-private competitions and overseeing contracts; and (3) whether the 12-month time limit placed on competitions in the revised OMB Circular A-76 is appropriate and how much of the time taken to conduct competitions in the past was used to do things that could be handled before the competition begins."
Date:
October 3, 2003
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Social Security Disability Programs: Clearer Guidance Could Help SSA Apply the Medical Improvement Standard More Consistently
A letter report issued by the Government Accountability Office with an abstract that begins "The Social Security Act requires that the Social Security Administration (SSA) find an improvement in a beneficiary's medical condition in order to remove him or her from either the Disability Insurance (DI) or Supplemental Security Income (SSI) programs. GAO was asked to (1) examine the proportion of beneficiaries who have improved medically and (2) determine if factors associated with the standard pose challenges for SSA when determining whether beneficiaries continue to be eligible for benefits. To answer these questions, GAO surveyed all 55 Disability Determination Services (DDS) directors, interviewed SSA officials, and reviewed pertinent SSA data."
Date:
October 3, 2006
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
U.S. Coast Guard National Pollution Funds Center: Claims Payment Process Was Functioning Effectively, but Additional Controls Are Needed to Reduce the Risk of Improper Payments
Correspondence issued by the General Accounting Office with an abstract that begins "The Oil Spill Liability Trust Fund (Fund) is a $1 billion fund authorized by the Oil Pollution Act of 1990 (OPA) to pay for (1) federal removal actions, (2) certain claims for uncompensated removal costs and damages,and (3) natural resource damage and restoration activities resulting from oil spills or the substantial threat of oil spills to the waters or shorelines of the United States. The Fund is administered by the National Pollution Funds Center (NPFC) of the U.S. Coast Guard. In May 2002, our Office of General Counsel reported on legal issues and limitations of the Fund and concluded that certain administrative costs were inappropriately being paid out of the Fund. In light of this conclusion, we reviewed the internal controls over disbursements from the Fund. Specifically, we reviewed the Fund to determine whether (1) the design of internal controls over the claims process provides reasonable assurance that improper payments will not occur or will be detected in the normal course of business and (2) internal controls over the claims process are operating as designed to help ensure proper payment of claims."
Date:
October 3, 2003
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
ATF: Thefts of Explosives from State and Local Government Storage Facilities Are Few but May Be Underreported
A letter report issued by the Government Accountability Office with an abstract that begins "More than 5.5 billion pounds of explosives are used each year in the United States by private sector companies and government entities. The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) has authority to regulate explosives and to license privately owned explosives storage facilities. After the July 2004 theft of several hundred pounds of explosives from a state and local government storage facility, concerns arose about vulnerability to theft. GAO analyzed (1) the extent of explosives thefts from state and local government facilities, (2) ATF's authority to regulate and oversee state and local government explosives storage facilities, (3) the information ATF collects about state and local government storage facilities, and (4) security oversight measures in place at selected state and local government storage facilities."
Date:
October 3, 2005
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Abstinence Education: Efforts to Assess the Accuracy and Effectiveness of Federally Funded Programs
A letter report issued by the Government Accountability Office with an abstract that begins "Reducing the incidence of sexually transmitted diseases and unintended pregnancies is one objective of the Department of Health and Human Services (HHS). HHS provides funding to states and organizations that provide abstinence-until-marriage education as one approach to address this objective. GAO was asked to describe the oversight of federally funded abstinence-until-marriage education programs. GAO is reporting on (1) efforts by HHS and states to assess the scientific accuracy of materials used in these programs and (2) efforts by HHS, states, and researchers to assess the effectiveness of these programs. GAO reviewed documents and interviewed HHS officials in the Administration for Children and Families (ACF) and the Office of Population Affairs (OPA) that award grants for these programs."
Date:
October 3, 2006
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Information Security: Weaknesses Continue Amid New Federal Efforts to Implement Requirements
A publication issued by the Government Accountability Office with an abstract that begins "For many years, GAO has reported that weaknesses in information security can lead to serious consequences--such as intrusions by malicious individuals, compromised networks, and the theft of sensitive information including personally identifiable information--and has identified information security as a governmentwide high-risk area. The Federal Information Security Management Act of 2002 (FISMA) established information security program, evaluation, and annual reporting requirements for federal agencies. The act requires the Office of Management and Budget (OMB) to oversee and report to Congress on agency information security policies and practices, including agencies' compliance with FISMA. FISMA also requires that GAO periodically report to Congress on (1) the adequacy and effectiveness of agencies' information security policies and practices and (2) agencies' implementation of FISMA requirements. To do this, GAO analyzed information security-related reports and data from 24 major federal agencies, their inspectors general, OMB, and GAO."
Date:
October 3, 2011
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Environmental Information: EPA Needs Better Information to Manage Risks and Measure Results
Testimony issued by the General Accounting Office with an abstract that begins "The Environmental Protection Agency (EPA) needs comprehensive and accurate data to manage its programs more effectively. In reports going back to 1988, GAO has identified many long-standing problems in the agency's efforts to collect and use environmental data. This report summarizes GAO's findings on: (1) EPA's need to set risk-based priorities for its programs, and (2) develop outcome-oriented measures of its programs' results. EPA's ability to assess risks and establish risk-based priorities has been hampered by data quality problems, including critical data gaps, databases that do not operate compatibly with one another, and persistent concerns about the accuracy of the data in many of EPA's data systems. To ensure future success in developing outcome measures, however, EPA will need to make a long-term commitment to overcome major challenges to obtaining the data needed to show the results of environmental programs."
Date:
October 3, 2000
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Financial Management: Strategies to Address Improper Payments at HUD, Education, and Other Federal Agencies
Testimony issued by the General Accounting Office with an abstract that begins "This testimony discusses (1) how internal control weaknesses make the departments of Housing and Urban Development (HUD) and Education vulnerable to, and in some cases have resulted in, improper and questionable payments and (2) strategies these and other federal agencies can use to better manage their improper payments. Despite a climate of increased scrutiny, most improper payments associated with federal programs continue to go unidentified as they drain taxpayer resources away from the missions and goals of our government. GAO found that both HUD and Education lacked fundamental internal controls over their purchase card programs that would have minimized the risk of improper purchases. Combined with a lack of monitoring, environments were created at HUD and Education where improper purchases could be made with little risk of detection. One of the most important internal controls in the purchase card process is the review of supporting documentation and approval of each purchase by the approving official. Another control that is effective in helping to prevent improper purchases is the blocking of certain merchant category codes. This control, available as part of the agencies' purchase card contracts with the card …
Date:
October 3, 2002
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Nuclear Energy: NRC Has Made Progress in Implementing Its Reactor Oversight and Licensing Processes but Continues to Face Challenges
Testimony issued by the Government Accountability Office with an abstract that begins "The Nuclear Regulatory Commission (NRC) is responsible for overseeing the nation's 104 commercial nuclear power reactors to ensure they are operated safely. Since 2000, NRC has used a formal Reactor Oversight Process (ROP) to oversee safety. NRC is also responsible for licensing the construction and operation of new reactors. Electric power companies have announced plans to submit 20 applications in the next 18 months. This testimony is based on GAO reports that reviewed (1) how NRC implements the ROP, (2) the results of the ROP over several years, (3) the status of NRC's efforts to improve the ROP, (4) NRC's efforts to prepare its workforce and manage its workload for new reactor licensing, and (5) NRC's efforts to develop its regulatory framework and review processes for new reactor activities. In conducting this work, GAO analyzed programwide information and interviewed cognizant NRC managers and industry representatives."
Date:
October 3, 2007
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Office of Workers' Compensation Programs: Goals and Monitoring Are Needed to Further Improve Customer Communications
Testimony issued by the General Accounting Office with an abstract that begins "This testimony discusses the Department of Labor's Office of Workers' Compensation Programs (OWCP). GAO reviewed how OWCP communicates with injured federal workers, agencies who employ these persons, and medical and other service providers who treat them. To evaluate OWCP's system, GAO used criteria suggested by the National Partnership for Reinventing Government (NPR). This report summarizes GAO's findings on NPR's study of private sector practices for providing telephone customer service, which included: (1) setting challenging goals for meeting callers' needs for timely and accurate information; (2) collecting credible performance data to measure progress in attaining those goals; and (3) improving telephone service by using the performance data and results to periodic surveys of customers and stakeholders to determine levels of satisfaction. GAO found that OWCP provided consistent customer service regardless of where injured workers live. GAO made 2,400 telephone calls to OWCP's 12 district offices. To compare OWCP's goals and practices for telephone communication with those of model organizations, GAO surveyed three agencies that have won awards for their telephone communication practices: the Social Security Administration, the Department of Veterans Affairs' Benefits Administration, and Ohio's Bureau of Workers' Compensation."
Date:
October 3, 2000
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
District of Columbia Government: Progress and Challenges in Performance Management
Testimony issued by the General Accounting Office with an abstract that begins "This testimony focuses on the District of Columbia's progress and challenges in performance management. GAO discusses whether the District: (1) met the 29 performance goals that it scheduled for completion by the end of fiscal year 2000 that Congress chose from the more than 400 performance measures contained in the Mayor's fiscal year 2001 budget request, and (2) provided evidence that the performance data are sufficiently reliable for measuring progress toward goals. Mayor Williams' performance management system contains many--but not all--of the elements used successfully by leading organizations. The District could improve the usefulness of its mandated annual performance plans and reports by ensuring that the District government's most significant performance goals are included in both the annual performance plan and the annual performance report that federal law requires the Mayor to send to Congress every year."
Date:
October 3, 2000
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Agricultural Quarantine Inspection Program: Management Problems May Increase Vulnerability of U.S. Agriculture to Foreign Pests and Diseases
Testimony issued by the Government Accountability Office with an abstract that begins "U.S. agriculture generates over $1 trillion in economic activity annually, but concerns exist about its vulnerability to foreign pests and diseases. Under the agricultural quarantine inspection (AQI) program, passengers and cargo are inspected at U.S. ports of entry to intercept prohibited material and pests. The Homeland Security Act of 2002 transferred responsibility for inspections from the U.S. Department of Agriculture's (USDA) Animal and Plant Health Inspection Service (APHIS) to the Department of Homeland Security's (DHS) Customs and Border Protection (CBP). APHIS retained some AQI-related responsibilities, such as policy setting and training. This testimony is based on issued GAO reports and discusses (1) steps DHS and USDA took that were intended to strengthen the AQI program, (2) views of agriculture specialists of their work experiences since the transfer, and (3) management problems. As part of these reports, GAO surveyed a representative sample of agriculture specialists on their work experiences, analyzed inspection and interception data, and interviewed agency officials."
Date:
October 3, 2007
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Cassette blanket and vacuum building: key elements in fusion reactor maintenance
The integration of two concepts important to fusion power reactors is discussed. The first concept is the vacuum building which improves upon the current fusion reactor designs. The second concept, the use of the cassette blanket within the vacuum building environment, introduces four major improvements in blanket design: cassette blanket module, zoning concept, rectangular blanket concept, and internal tritium recovery. (MHR)
Date:
October 3, 1977
Creator:
Werner, R.W.
Object Type:
Article
System:
The UNT Digital Library
Executive Correspondence - Letter dtd 09/19/05 from Chairman Principi to Iowa Senator Charles Grassley
Executive Correspondence - Letter dtd 09/19/05 from Chairman Principi to Iowa Senator Charles Grassley in reply to his letter of 09/12/05. The Chairman provides answers to the Senator's questions regarding Rock Island Arsenal, Illinois.
Date:
October 3, 2005
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
BRAC Early Bird 03 October, 2005
BRAC Early Bird 03 October, 2005
Date:
October 3, 2005
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Text
System:
The UNT Digital Library
Reproductive Health Hazards in the Workplace: Selected Aspects of Reproductive Health Hazards Regulations
A staff paper by the Office of Technology Assessment (OTA) assessing the workplace reproductive health hazards regulations.
Date:
October 3, 1985
Creator:
United States. Congress. Office of Technology Assessment.
Object Type:
Report
System:
The UNT Digital Library