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Isochoric Implosions for Fast Ignition

Description: Various gain models have shown the potentially great advantages of Fast Ignition (FI) Inertial Confinement Fusion (ICF) over its conventional hot spot ignition counterpart [e.g., S. Atzeni, Phys. Plasmas 6, 3316 (1999); M. Tabak et al., Fusion Sci. & Technology 49, 254 (2006)]. These gain models, however, all assume nearly uniform-density fuel assemblies. In contrast, conventional ICF implosions yield hollowed fuel assemblies with a high-density shell of fuel surrounding a low-density, high-pre… more
Date: April 4, 2007
Creator: Clark, D S & Tabak, M
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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USING WET AIR OXIDATION TECHNOLOGY TO DESTROY TETRAPHENYLBORATE

Description: A bench-scale feasibility study on the use of a Wet Air Oxidation (WAO) process to destroy a slurry laden with tetraphenylborate (TPB) compounds has been undertaken. WAO is an aqueous phase process in which soluble and/or insoluble waste constituents are oxidized using oxygen or oxygen in air at elevated temperatures and pressures ranging from 150 C and 1 MPa to 320 C and 22 MPa. The products of the reaction are CO{sub 2}, H{sub 2}O, and low molecular weight oxygenated organics (e.g. acetate, o… more
Date: April 4, 2007
Creator: Adu-Wusu, K; Daniel McCabe, D & Bill Wilmarth, B
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Scientific Computing Kernels on the Cell Processor

Description: The slowing pace of commodity microprocessor performance improvements combined with ever-increasing chip power demands has become of utmost concern to computational scientists. As a result, the high performance computing community is examining alternative architectures that address the limitations of modern cache-based designs. In this work, we examine the potential of using the recently-released STI Cell processor as a building block for future high-end computing systems. Our work contains sev… more
Date: April 4, 2007
Creator: Williams, Samuel W.; Shalf, John; Oliker, Leonid; Kamil, Shoaib; Husbands, Parry & Yelick, Katherine
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Basic Research Needs for Electrical Energy Storage. Report of the Basic Energy Sciences Workshop on Electrical Energy Storage, April 2-4, 2007

Description: To identify research areas in geosciences, such as behavior of multiphase fluid-solid systems on a variety of scales, chemical migration processes in geologic media, characterization of geologic systems, and modeling and simulation of geologic systems, needed for improved energy systems.
Date: April 4, 2007
Creator: Goodenough, J. B.; Abruna, H. D. & Buchanan, M. V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Congressional Commissions, Committees, Boards, and Groups: Appointment Authority and Membership

Description: This report was intended to inform Members of Congress of their specific appointment responsibilities and to make them aware of their opportunities to serve as members on Congressional Commissions, Committees, Boards, and Groups.
Date: April 4, 2007
Creator: Glassman, Matthew E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Nuclear Weapons: Comprehensive Test Ban Treaty

Description: This report discusses a comprehensive test ban treaty (CTBT). Congress addresses nuclear weapon issues in the annual National Defense Authorization Act and the Energy and Water Development Appropriations Act.
Date: April 4, 2007
Creator: Medalia, Jonathan
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The importance of EBIT data for Z-pinch plasma diagnostics

Description: The results from the last six years of x-ray spectroscopy and spectropolarimetry of high energy density Z-pinch plasmas complemented by experiments with the electron beam ion trap (EBIT) at the Lawrence Livermore National Laboratory (LLNL) are presented. The two topics discussed are the development of M-shell x-ray W spectroscopic diagnostics and K-shell Ti spectropolarimetry of Z-pinch plasmas. The main focus is on radiation from a specific load configuration called an 'X-pinch'. X-pinches are… more
Date: April 4, 2007
Creator: Safronova, A S; Kantsyrev, V L; Neill, P; Safronova, U I; Fedin, D A; Ouart, N D et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ATLAS Metadata Task Force

Description: This document provides an overview of the metadata, which are needed to characterizeATLAS event data at different levels (a complete run, data streams within a run, luminosity blocks within a run, individual events).
Date: April 4, 2007
Creator: Collaboration, ATLAS; Costanzo, D.; Cranshaw, J.; Gadomski, S.; Jezequel, S.; Klimentov, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Metastable Vacua and D-branes at the Conifold

Description: We consider quiver gauge theories arising on D-branes at simple Calabi-Yau singularities (quotients of the conifold). These theories have metastable supersymmetry breaking vacua. The field theoretic mechanism is basically the one exhibited by the examples of Intriligator, Seiberg and Shih in SUSY QCD. In a dual description, the SUSY breaking is captured by the presence of anti-branes. In comparison to our earlier related work, the main improvements of the present construction are that we can re… more
Date: April 4, 2007
Creator: Argurio, Riccardo; Bertolini, Matteo; Franco, Sebastian & Kachru, Shamit
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

AN OVERVIEW OF CESIUM-137 CONTAMINATION IN A SOUTHEASTERN SWAMP ENVIRONMENT

Description: In the early 1960s, an area of privately owned swamp adjacent to the Savannah River Site (SRS) was contaminated by site operations. Studies conducted in 1974 estimated that approximately 925 GBq of {sup 137}Cs and 37 GBq of {sup 60}Co were deposited in the swamp. Subsequently, a series of surveys was initiated to characterize the contaminated environment. These surveys--composed of 52 monitoring locations--allow for continued monitoring at a consistent set of locations. Initial survey results i… more
Date: April 4, 2007
Creator: Fledderman, P; Tim Jannik, T & Michael Paller, M
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Sequestering in String Theory

Description: We study sequestering, a prerequisite for flavor-blind supersymmetry breaking in several high-scale mediation mechanisms, in compactifications of type IIB string theory. We find that although sequestering is typically absent in unwarped backgrounds, strongly warped compactifications do readily sequester. The AdS/CFT dual description in terms of conformal sequestering plays an important role in our analysis, and we establish how sequestering works both on the gravity side and on the gauge theory… more
Date: April 4, 2007
Creator: Kachru, Shamit; McAllister, Liam & Sundrum, Raman
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Status of SM Calculations of b to s Transitions

Description: We report recent progress in SM calculations of b {yields} s transitions. We discuss the first NNLL prediction of the {bar B} {yields} X{sub s}{gamma} branching ratio, including important additional subtleties due to non-perturbative corrections and logarithmically-enhanced cut effects, and also recent results on the inclusive mode {bar B} {yields} X{sub s}{ell}{sup +}{ell}{sup -}. Moreover, new results on the corresponding exclusive modes are reviewed. Finally, we comment on the present status… more
Date: April 4, 2007
Creator: Hurth, Tobias & /SLAC, /CERN
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Storage Ring Optics Measurement, Model, and Correction

Description: To improve the optics of a storage ring, it is very helpful if one has an accurate lattice model. Although the ideal lattice may serve such a purpose to some extent, in most cases, real accelerator optics improvement requires accurate measurement of optics parameters. In this section, we present precision measurements of a complete set of linear orbits from which we can form a linear optics model to match the linear optics of the real machine. We call such a model a virtual machine. We have use… more
Date: April 4, 2007
Creator: Yan, Yiton T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Capital Gains Tax Rates and Revenues

Description: This report provides historical information on the holding period, maximum statutory tax rate, and revenues from the taxation of individual capital gains income.
Date: April 4, 2007
Creator: Esenwein, Gregg A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

TANK 21H SUPERNATE SAMPLE CROSS-CHECK ANALYSIS - 2007

Description: The intent of this analysis was to perform cross-checks against routine F/H Lab analyses (corrosion, enrichment, soluble uranium, plutonium and feed qualification program). This Tank 21H supernate sample was analyzed mainly for the following contaminants and radionuclides: free OH{sup -}, NO{sub 2}{sup -}, NO{sub 3}{sup -}, SO{sub 4}{sup -2}, CO{sub 3}{sup -2}, Al, Si, Na and Pu-isotopes, total gamma and U- isotopes.
Date: April 4, 2007
Creator: Oji, L & Shirley Mccollum, S
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Proposal to Modify the Polarimeter Chicane in the ILC 14 mrad Extraction Line

Description: A proposal is presented in this paper to modify the extraction line polarimeter chicane to allow the Compton backscattered electrons to be deflected further from the beam line, and to provide optics for the downstream GAMCAL detector.
Date: April 4, 2007
Creator: Moffeit, Ken; Maruyama, Takashi; Nosochkov, Yuri; Seryi, Andrei; Woodley, Mark & Woods, Mike
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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