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Active Detection of Small Quantities of Shielded Highly-Enriched Uranium Using Low-Dose 60-keV Neutron Interrogation

Description: Active interrogation with low-energy neutrons provides a search technique for shielded highly-enriched uranium. We describe the technique and show initial results using a low-dose 60 keV neutron beam. This technique produces a clear induced fission signal in the presence of small quantities of {sup 235}U. The technique has been validated with low-Z and high-Z shielding materials. The technique uses a forward-directed beam of 60 keV neutrons to induce fission in {sup 235}U. The induced fission p… more
Date: August 16, 2006
Creator: Kerr, P.; Rowland, M.; Dietrich, D.; Stoeffl, W.; Wheeler, B.; Nakae, L. et al.
Item Type: Refine your search to only Article
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Analysis and Interpretation of Hard X-ray Emission from the Bullet Cluster (1E0657-56), the Most Distant Cluster of Galaxies Observed by RXTE

Description: Evidence for non-thermal activity in clusters of galaxies is well established from radio observations of synchrotron emission by relativistic electrons. New windows in the Extreme Ultraviolet and Hard X-ray ranges have provided for more powerful tools for the investigation of this phenomenon. Detection of hard X-rays in the 20 to 100 keV range have been reported from several clusters of galaxies, notably from Coma and others. Based on these earlier observations we identified the relatively high… more
Date: August 16, 2006
Creator: Petrosian, Vahe; Madejski, Greg & Luli, Kevin
Item Type: Refine your search to only Article
open access

Analysis and Modeling of DIII-D Hybrid Discharges and their Extrapolation to ITER

Description: Recent experiments on tokamaks around the world [1-5] have demonstrated discharges with moderately high performance in which the q-profile remains stationary, as measured by the motional Stark effect diagnostic, for periods up to several {tau}{sub R}. Hybrid discharges are characterize by q{sub min} {approx} 1, high {beta}{sub N}, and good confinement. These discharges have been termed hybrid because of their intermediate nature between that of an ordinary H-mode and advanced tokamak discharges… more
Date: June 16, 2006
Creator: Makowski, M. A.; Casper, T. A.; Jayakumar, R. J.; Pearlstein, L. D.; Petty, C. C. & Wade, M. R.
Item Type: Refine your search to only Article
open access

An Analysis of the DER Adoption Climate in Japan UsingOptimization Results for Prototype Buildings with U.S. Comparisons

Description: This research demonstrates economically optimal distributedenergy resource (DER) system choice using the DER choice and operationsoptimization program, the Distributed Energy Resources Customer AdoptionModel (DER-CAM). DER-CAM finds the optimal combination of installedequipment given prevailing utility tariffs and fuel prices, siteelectrical and thermal loads (including absorption cooling), and a menuof available equipment. It provides a global optimization, albeitidealized, that shows how site… more
Date: June 16, 2006
Creator: Zhou, Nan; Marnay, Chris; Firestone, Ryan; Gao, Weijun & Nishida,Masaru
Item Type: Refine your search to only Article
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Analytical Approach to Eigen-Emittance Evolution in Storage Rings

Description: This dissertation develops the subject of beam evolution in storage rings with nearly uncoupled symplectic linear dynamics. Linear coupling and dissipative/diffusive processes are treated perturbatively. The beam distribution is assumed Gaussian and a function of the invariants. The development requires two pieces: the global invariants and the local stochastic processes which change the emittances, or averages of the invariants. A map based perturbation theory is described, providing explicit … more
Date: May 16, 2006
Creator: Nash, Boaz
Item Type: Refine your search to only Report
open access

An application of Fleck effective scattering to the difference formulation for photon transport

Description: We introduce a new treatment of the difference formulation[1] for photon radiation transport without scattering in 1d slab geometry that is closely analogous to that of Fleck and Cummings[2] for the traditional formulation. The resulting form is free of implicit source terms and has the familiar effective scattering of the field of transport.
Date: October 16, 2006
Creator: Daffin, F.
Item Type: Refine your search to only Report
open access

The Back End of the Fuel Cycle Moves Front and Center

Description: For many years, the commercial nuclear business has remained relatively stable in many ways. The introduction of new plants, the spread to new countries, and the development of key elements of the fuel cycle such as enrichment, reprocessing and waste disposal have been quite modest. That is unlikely to be the case in the coming years. A number of events and trends are becoming increasingly apparent and are cause for both opportunity and caution: (1) New nuclear power plant orders are likely to … more
Date: February 16, 2006
Creator: Isaacs, T & Choi, J
Item Type: Refine your search to only Article
open access

Balkan Cooperation on War Crimes Issues

Description: In early May 2006, assessments of insufficient Serbian cooperation with the International Criminal Tribunal for the former Yugoslavia (ICTY) led the European Union (EU) to suspend association talks with Serbia. Later that month, the U.S. Secretary of State withheld certification of full Serbian cooperation with ICTY, leading to a partial suspension of U.S. bilateral assistance to Serbia. From late 2004 through early 2005, a combination of intensified international pressure and deadlines associa… more
Date: June 16, 2006
Creator: Kim, Julie
Item Type: Refine your search to only Report
open access

Balkan Cooperation on War Crimes Issues

Description: The report is about the Balkan Cooperation on War Crimes Issues.In early May 2006, assessments of insufficient Serbian cooperation with the International Criminal Tribunal for the former Yugoslavia (ICTY) led the European Union (EU) to suspend association talks with Serbia. Later that month, the U.S. Secretary of State withheld certification of full Serbian cooperation with ICTY, leading to a partial suspension of U.S. bilateral assistance to Serbia.
Date: June 16, 2006
Creator: Kim, Julie
Item Type: Refine your search to only Report
open access

Beam Instrumentation Challenges at the International Linear Collider

Description: The International Linear Collider (ILC) is a proposed facility for the study of high energy physics through electron-positron collisions at center-of-mass energies up to 500 GeV and luminosities up to 2 x 10{sup 34} cm{sup -2} sec{sup -1}. Meeting the ILC's goals will require an extremely sophisticated suite of beam instruments for the preservation of beam emittance, the diagnosis of optical errors and mismatches, the determination of beam properties required for particle physics purposes, and … more
Date: May 16, 2006
Creator: Tenenbaum, Peter
Item Type: Refine your search to only Article
open access

Benchmark of the IMPACT Code for High Intensity Beam DynamicsSimulation

Description: The IMPACT (Integrated Map and Particle Accelerator Tracking) code was first developed under Computational Grand Challenge project in the mid 1990s [1]. It started as a three-dimensional (3D) data parallel particle-in-cell (PIC) code written in High Performance Fortran. The code used a split-operator based method to solve the Hamiltonian equations of motion. It contained linear transfer maps for drifts, quadrupole magnets and rf cavities. The space-charge forces were calculated using an FFT-bas… more
Date: November 16, 2006
Creator: Qiang, J. & Ryne, R.D.
Item Type: Refine your search to only Article
open access

Biogeochemical Cycling and Environmental Stability of Plutonium Relevant to Long-Term Stewardship of Doe Sites.

Description: Pu is generally considered to be relatively immobile in the terrestrial environment, with the exception of transport via airborne and erosion mechanisms. More recently the transport of colloidal forms of Pu is being studied as a mobilization pathway from subsurface contaminated soils and sediments. The overall objective of this research is to understand the biogeochemical cycling of Pu in environments of interest to long-term DOE stewardship issues. Microbial processes are central to the immobi… more
Date: November 16, 2006
Creator: Francis, A. J.; Gillow, J. P. & DODGE, C. J.
Item Type: Refine your search to only Report
open access

Brief Summaries of Federal Animal Protection Status

Description: This report contains brief summaries of federal animal protection statutes, listed alphabetically. It does not include treaties, although it does include statutes enacted to implement treaties. It includes statutes concerning animals that are not entirely, or not at all, animal protection statutes. For example, it includes a statute authorizing the eradication of predators, because one of the statute’s purposes is to protect domestic and “game” animals; and it includes statutes to conserve fish… more
Date: October 16, 2006
Creator: Cohen, Henry
Item Type: Refine your search to only Report
open access

Brief Summaries of Federal Animal Protection Statutes

Description: This report contains brief summaries of federal animal protection statutes, listed alphabetically. It includes statutes enacted to implement treaties, those that protect certain groups of animals (e.g., protection of "game" animals rather than predators), statutes to conserve fish, statutes that allow the disabled to use service animals, and statutes aimed at acts of animal rights advocates (the Animal Enterprise Protection Act of 1992, and the Recreational Hunting Safety and Preservation Act o… more
Date: October 16, 2006
Creator: Cohen, Henry
Item Type: Refine your search to only Report
open access

Bureau of the Public Debt: Areas for Improvement in Information Security Controls

Description: Correspondence issued by the Government Accountability Office with an abstract that begins "In connection with fulfilling our requirement to audit the financial statements of the U.S. government, we audited and reported on the Schedules of Federal Debt Managed by the Bureau of the Public Debt (BPD) for the fiscal years ended September 30, 2005 and 2004. As part of these audits, we performed a review of the general and application information security controls over key BPD financial systems. Thi… more
Date: March 16, 2006
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
open access

Capitol Power Plant Utility Tunnels

Description: Correspondence issued by the Government Accountability Office with an abstract that begins "The Architect of the Capitol (AOC), through the Capitol Power Plant (CPP), operates five walkable utility tunnels containing steam and chilled water pipes associated with serving the heating and cooling requirements of the U.S. Capitol and 23 surrounding facilities. The tunnels also carry other utilities, such as fiber optic and telephone lines. The Office of Compliance (OOC), which is responsible for ad… more
Date: November 16, 2006
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
open access

Characterization of ambient aerosols at the San Francisco International Airport using BioAerosol Mass Spectrometry

Description: The BioAerosol Mass Spectrometry (BAMS) system is a rapidly fieldable, fully autonomous instrument that can perform correlated measurements of multiple orthogonal properties of individual aerosol particles. The BAMS front end uses optical techniques to nondestructively measure a particle's aerodynamic diameter and fluorescence properties. Fluorescence can be excited at 266nm or 355nm and is detected in two broad wavelength bands. Individual particles with appropriate size and fluorescence prope… more
Date: March 16, 2006
Creator: Steele, P T; McJimpsey, E L; Coffee, K R; Fergenson, D P; Riot, V J; Tobias, H J et al.
Item Type: Refine your search to only Article
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