A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Defense (DOD) has spent a total of over $115 billion since the mid-1980s to develop a Ballistic Missile Defense System (BMDS) comprised of land, air, and sea-based elements--such as missiles and radars--working together as an integrated system. Since the cost to operate and support a weapon system usually accounts for most of a system's lifetime costs, the resources needed to fund BMDS could be significant as DOD fields an increasing number of BMDS elements. In 2005, DOD began planning to transition responsibility for supporting BMDS elements from the Missile Defense Agency (MDA) to the services. GAO was asked to assess the extent to which DOD has (1) planned to support BMDS elements over the long-term, and (2) identified long-term operation and support costs. To do so, GAO analyzed 7 BMDS elements that will be fielded by 2015, compared DOD's plans and cost estimates to DOD and GAO key principles, and assessed the extent to which MDA and the services have agreed on responsibilities for supporting and funding BMDS elements."

A letter report issued by the Government Accountability Office with an abstract that begins "The volume, but not the energy content, of hydrocarbon fuels, such as gasoline and diesel, varies in response to changes in temperature. Thus, because of expansion, the energy content per gallon of 90 degree fuel is less than that of 60 degree fuel. States and localities adopt and enforce weights and measures regulations, often using the model regulatory standards published by the National Institute of Standards and Technology (NIST). Although technology now exists to compensate for the effects of temperature on gas volume, the costs of doing so at the retail level have become the subject of much debate among weights and measures officials, consumer groups, and representatives of the petroleum and fuel marketing industries. GAO was asked to provide information on (1) the views of U.S. stakeholders on the costs to implement automatic temperature compensation, (2) the views of U.S. stakeholders on who would bear these costs, and (3) the reasons some state and national governments have adopted or rejected automatic temperature compensation. To do this work, GAO reviewed NIST and other documents and congressional testimony; interviewed stakeholders from 3 federal agencies, 17 states, and …

A letter report issued by the Government Accountability Office with an abstract that begins "During the late 1990s, many petroleum companies merged to stay profitable while crude oil prices were low, and in recent years mergers have continued. Congress and others have concerns about the impact mergers might be having on competition in U.S. petroleum markets. The Federal Trade Commission (FTC) has the authority to maintain competition in the petroleum industry and reviews proposed mergers to determine whether they are likely to diminish competition or increase prices, among other things. GAO was asked to examine (1) mergers in the U.S. petroleum industry and changes in market concentration since 2000 and (2) the steps FTC uses to maintain competition in the U.S. petroleum industry, and the roles other federal and state agencies play in monitoring petroleum industry markets. In conducting this study, GAO worked with petroleum industry experts to delineate regional markets and to develop estimates of refinery gasoline production capacity in order to calculate market concentration. GAO used public and private data as well as interviews for its analyses."

A letter report issued by the Government Accountability Office with an abstract that begins "Increasing combat demands and fiscal constraints make it critical for the Department of Defense (DOD) to ensure that its weapon system investments not only meet the needs of the warfighter, but make the most efficient use of available resources. GAO's past work has shown that achieving this balance has been a challenge and weapon programs have often experienced cost growth and delayed delivery to the warfighter. In 2003, DOD implemented the Joint Capabilities Integration and Development System (JCIDS) to prioritize and ensure that the warfighter's most essential needs are met. In response to Senate Report 109-69, GAO reported in March 2007 that DOD lacks an effective approach to balance its weapon system investments with available resources. This follow-on report focuses on (1) whether the JCIDS process has achieved its objective to prioritize joint warfighting needs and (2) factors that have affected DOD's ability to effectively implement JCIDS. To conduct its work, GAO reviewed JCIDS guidance and capability documents and budgetary and programming data on major weapon systems, and interviewed DOD officials."

Testimony issued by the Government Accountability Office with an abstract that begins "Los Alamos National Laboratory (LANL) is one of three National Nuclear Security Administration (NNSA) laboratories that designs and develops nuclear weapons for the U.S. stockpile. LANL employees rely on sensitive and classified information and assets that are protected at different levels, depending on the risks posed if they were lost, stolen, or otherwise compromised. However, LANL has experienced several significant security breaches during the past decade. This testimony provides GAO's (1) views on physical security at LANL, as discussed in Los Alamos National Laboratory: Long-Term Strategies Needed to Improve Security and Management Oversight, GAO-08-694 (June 13, 2008); (2) preliminary observations on physical security at Lawrence Livermore National Laboratory; and (3) views on cyber security at LANL as discussed in Information Security: Actions Needed to Better Protect Los Alamos National Laboratory's Unclassified Computer Network, GAO-08-1001 (Sept. 9, 2008). To conduct this work, GAO analyzed data, reviewed policies and procedures, interviewed laboratory officials, and conducted site visits to the two laboratories."

A letter report issued by the Government Accountability Office with an abstract that begins "Each year, tens of thousands of people who have been persecuted or fear persecution in their home countries apply for asylum in the United States. Immigration judges (IJ) from the Department of Justice's (DOJ) Executive Office for Immigration Review (EOIR) decide whether to grant or deny asylum to aliens in removal proceedings. Those denied asylum may appeal their case to EOIR's Board of Immigration Appeals (BIA). GAO was asked to assess the variability of IJ rulings, and the effects of policy changes related to appeals and claims. This report addresses: (1) factors affecting variability in asylum outcomes; (2) EOIR actions to assist applicants and IJs; (3) effects associated with procedural changes at the BIA; and (4) effects of the requirement that asylum seekers apply within 1 year of entering the country. GAO analyzed DOJ asylum data for fiscal years 1995 through mid-2007, visited 5 immigration courts in 3 cities, including those with 3 of the top 4 asylum caseloads; observed asylum hearings; and interviewed key officials. Results of the visits provided additional information but were not projectable."

Correspondence issued by the Government Accountability Office with an abstract that begins "The Department of Homeland Security's (DHS) U.S. Citizenship and Immigration Services (USCIS) is responsible for granting or denying applications or petitions of foreign nationals seeking to become citizens of the United States or to study, work, or live in this country. In order to process the millions of applications and petitions that USCIS receives each year, USCIS uses contractors to perform various support services including SI International, Inc. and Stanley Associates for mail operations, fee collection, data collection, and file operations at its four service centers, in California, Nebraska, Vermont, and Texas. The contracts with these two firms are expiring, and USCIS has the option to extend the contracts for one year beginning in December 2008. We understand that USCIS may be planning to propose possible contract changes for the option year. Based on our ongoing work on USCIS user fees, we believe that improvements could be made to these contracts before the options to extend the contracts are exercised. The purpose of this report is to summarize our initial observations on performance standards and financial deductions to assist USCIS in obtaining the most value and highest level …

A letter report issued by the Government Accountability Office with an abstract that begins "Our Nation's overall election system depends on all levels of government and the interplay of people, processes, and technology, which includes the voting systems that are used during an election. GAO has previously reported on issues and challenges associated with ensuring that voting systems are secure and reliable. The states, territories, and the District of Columbia (District) each play a pivotal role in managing voting systems to ensure that they perform as intended. In light of this role, GAO was asked to answer the following questions relative to states, territories, and the District: (1) what voting methods and systems are these entities using in federal elections and what changes are underway; (2) how do they certify or otherwise approve voting systems; (3) what other steps do they take to ensure the accuracy, reliability, and security of voting systems; (4) how do they identify, evaluate, and respond to voting system problems; and (5) how do they view federal voting system-related resources and services. To accomplish this, GAO conducted a Web-based survey of election officials in all 50 states, the four U.S. territories, and the District and received …

A letter report issued by the Government Accountability Office with an abstract that begins "Semiconductors are key components in weapons systems and consumer electronics. Since semiconductors have both civilian and military applications, U.S. export control policy treats the equipment and materials used to manufacture semiconductors as "dual-use" items, and controls the export of these items through licensing requirements to sensitive destinations such as China. You requested that we update our 2002 report on China's semiconductor manufacturing capabilities to address the (1) evolution of China's capabilities since 2002, (2) changes to U.S. export control policies over the sale of semiconductor manufacturing equipment and materials to China since 2002, and (3) the advantages and limitations of these changes."

Correspondence issued by the Government Accountability Office with an abstract that begins "Major changes affecting the U.S. Postal Service (USPS)--including declining mail volumes, increasing operating expenses such as rising fuel costs, and a more competitive marketplace--have reinforced the need for USPS to increase efficiency and reduce expenses in its mail processing network. This network includes over 600 facilities that sort mail and prepare it for transportation and delivery. First-Class Mail provides USPS with high revenue per piece and has traditionally helped USPS cover its overhead costs. However, First-Class Mail volumes have been declining since 2001 and this downward trend is expected to continue. Furthermore, while First-Class Mail volumes have been declining, worksharing by mailers has increased. Worksharing allows mailers to earn discounts on postage rates by presorting, preparing, and transporting their mail to a postal facility near the mail's destination. As worksharing has increased, ever-larger volumes of mail have bypassed most of USPS's processing activities, creating excess network capacity. To address these trends affecting its mail processing network, USPS has developed several initiatives to reduce costs and increase efficiency. One such initiative, area mail processing, is designed to consolidate operations at facilities with excess machine capacity, and thereby increase the …

A letter report issued by the Government Accountability Office with an abstract that begins "Each year, tens of thousands of noncitizens apply in the United States for asylum, which provides refuge to those who have been persecuted or fear persecution. Asylum officers (AO) in the Department of Homeland Security's (DHS) U.S. Citizenship and Immigration Services (USCIS), and immigration judges (IJ) in the Department of Justice's (DOJ) Executive Office for Immigration Review (EOIR) assess applicants' credibility and eligibility. GAO was asked to evaluate aspects of the asylum system. This report addresses the extent to which quality assurance mechanisms have been designed to ensure adjudications' integrity, how key factors affect AOs' adjudications, and what key factors affect IJs' adjudications. To conduct this work, GAO reviewed agency documents, policies, and procedures; surveyed all AOs, supervisory AOs, and IJs; and visited three of the eight Asylum Offices. These offices varied in size and percentage of cases granted asylum. Results of these visits provided additional information but were not projectable."

Testimony issued by the Government Accountability Office with an abstract that begins "The Department of Homeland Security's (DHS) Domestic Nuclear Detection Office (DNDO) is responsible for addressing the threat of nuclear smuggling. Radiation detection portal monitors are key elements in our national defenses against such threats. DHS has sponsored testing to develop new monitors, known as advanced spectroscopic portal (ASP) monitors, to replace radiation detection equipment currently being used at ports of entry. ASPs may offer improvements over current generation portal monitors, particularly the potential to identify as well as detect radioactive material and thereby minimize both missed threats and false alarms. However, ASPs cost significantly more than current generation portal monitors, and testing of ASPs' capabilities needs to be more objective and rigorous. Due to concerns about ASPs' cost and performance, Congress has required that the Secretary of DHS certify that ASPs will provide a significant increase in operational effectiveness before obligating funds for full-scale ASP procurement. DHS is currently testing ASPs and anticipates a decision on certification in November 2008. This testimony addresses (1) the highlights of GAO's September 2008 report on the life cycle cost estimate to deploy ASPs (GAO-08-1108R), and (2) preliminary observations from ongoing work …

Testimony issued by the Government Accountability Office with an abstract that begins "Since 1990, GAO has designated the Department of Defense's (DOD) management of major weapon system acquisitions a high risk area. DOD has taken some action to improve acquisition outcomes, but its weapon programs continue to take longer, cost more, and deliver fewer capabilities than originally planned. These persistent problems--coupled with current operational demands--have impelled DOD to work outside of its traditional acquisition process to acquire equipment that meet urgent warfighter needs. Poor outcomes in DOD's weapon system programs reverberate across the entire federal government. Over the next 5 years, DOD expects to invest more than $357 billion on the development and procurement of major defense acquisition programs. Every dollar wasted on acquiring weapon systems is less money available for other priorities. This testimony describes DOD's current weapon system investment portfolio, the problems that contribute to cost and schedule increases, potential solutions based on past GAO recommendations, and recent legislative initiatives and DOD actions aimed at improving outcomes. It also provides some observations about what is needed for DOD to achieve lasting reform. The testimony is drawn from GAO's body of work on DOD's acquisition, requirements, and funding processes, …

Testimony issued by the Government Accountability Office with an abstract that begins "Despite a recent reduction in air traffic due to economic factors, congestion on airport runways remains a safety concern. The nation's aviation system is still expected to grow and become more crowded in the coming years, exacerbating concerns about ground safety issues, including runway incursions, which occur when aircraft enter runways without authorization. This statement addresses (1) recent trends in runway incursions, (2) steps taken to improve runway safety, and (3) what more could be done. This statement is based on GAO's November 2007 report issued to this Subcommittee on runway safety. GAO's work on that report included surveying experts on the causes of runway incidents and accidents and the effectiveness of measures to address them, reviewing safety data, and interviewing agency and industry officials. This statement also contains information from FAA on recent incursions and actions taken since November 2007."

The Heavy-Ion Fusion Sciences Virtual National Laboratory is pursuing an approach to target heating experiments in the Warm Dense Matter regime, using spacecharge-dominated ion beams that are simultaneously longitudinally bunched and transversely focused. Longitudinal beam compression by large factors has beendemonstrated in the Neutralized Drift Compression Experiment (NDCX) with controlledramps and forced neutralization. Using an injected 30-mA K+ ion beam with initialkinetic energy 0.3 MeV, axial compression leading to ~;;50-fold current amplification andsimultaneous radial focusing to beam radii of a few mm have led to encouraging energy deposition approaching the intensities required for eV-range target heating experiments. We discuss the status of several improvements to our Neutralized Drift Compression Experiment and associated beam diagnostics that are under development to reach the necessary higher beam intensities, including: (1) greater axial compression via a longer velocity ramp using a new bunching module with approximately twice the available voltseconds; (2) improved centroid control via beam steering dipoles to mitigate aberrations in the bunching module; (3) time-dependent focusing elements to correct considerable chromatic aberrations; and (4) plasma injection improvements to establish a plasma density always greater than the beam density, expected to be>1013 cm-3.

In this paper we report on multi-physics, multi-billion macroparticle simulation of beam transport in a free electron laser (FEL) linac for future light source applications. The simulation includes a self-consistent calculation of 3D space-charge effects, short-range geometry wakefields, longitudinal coherent synchrotron radiation (CSR) wakefields, and detailed modeling of RF acceleration and focusing. We discuss the need for and the challenges associated with such large-scale simulation. Applications to the study of the microbunching instability in an FEL linac are also presented.

Transport of high-power rf fields and the subsequent deposition of rf power into plasma is an important component of developing tokamak fusion energy. Two limitations on rf heating are: (i) breakdown of the metallic structures used to deliver rf power to the plasma, and (ii) a detailed understanding of how rf power couples into a plasma. Computer simulation is a main tool for helping solve both of these problems, but one of the premier tools, VORPAL, is traditionally too difficult to use for non-experts. During this Phase II project, we developed the VorpalView user interface tool. This tool allows Department of Energy researchers a fully graphical interface for analyzing VORPAL output to more easily model rf power delivery and deposition in plasmas.

Fluidized Bed Steam Reforming (FBSR) has been demonstrated to be a viable technology to remove >99% of the organics from Tank 48H simulant, to remove >99% of the nitrate/nitrite from Tank 48H simulant, and to form a solid product that is primarily carbonate based. The technology was demonstrated in October of 2006 in the Engineering Scale Test Demonstration Fluidized Bed Steam Reformer1 (ESTD FBSR) at the Hazen Research Inc. (HRI) facility in Golden, CO. The purpose of the Bench-scale Steam Reformer (BSR) testing was to demonstrate that the same reactions occur and the same product is formed when steam reforming actual radioactive Tank 48H waste. The approach used in the current study was to test the BSR with the same Tank 48H simulant and same Erwin coal as was used at the ESTD FBSR under the same operating conditions. This comparison would allow verification that the same chemical reactions occur in both the BSR and ESTD FBSR. Then, actual radioactive Tank 48H material would be steam reformed in the BSR to verify that the actual tank 48H sample reacts the same way chemically as the simulant Tank 48H material. The conclusions from the BSR study and comparison to the ESTD …

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This paper reports the design and test results on novel topology, high-efficiency, and low operating temperature, 1,320-watt power modules for high availability power supplies. The modules permit parallel operation for N+1 redundancy with hot swap capability. An embedded DSP provides intelligent start-up and shutdown, output regulation, general control and fault detection. PWM modules in the DSP drive the FET switches at 20 to 100 kHz. The DSP also ensures current sharing between modules, synchronized switching, and soft start up for hot swapping. The module voltage and current have dedicated ADCs (>200 kS/sec) to provide pulse-by-pulse output control. A Dual CAN bus interface provides for low cost redundant control paths. Over-rated module components provide high reliability and high efficiency at full load. Low on-resistance FETs replace conventional diodes in the buck regulator. Saturable inductors limit the FET reverse diode current during switching. The modules operate in a two-quadrant mode, allowing bipolar output from complimentary module groups. Controllable, low resistance FETs at the input and output provide fault isolation and allow module hot swapping.

The power conversion group at SLAC is currently redesigning the H-bridge switch plates of the High Voltage Converter Modulators at the Spallation Neutron Source. This integral part to the modulator operation has been indentified as a source of several modulator faults and potentially limits reliability with pulse width modulation operation. This paper is a presentation of the design and implementation of a redesigned switch plate based upon press-pack IGBTs.

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