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FY05 LDRD Final Report Spectroscopy of Shocked Deuterium

Description: We summarize the observations of unusual optical properties of shocked liquid deuterium (D{sub 2}) that led to proposing spectroscopic measurements. The apparatus built for the measurements is briefly described, along with some representative results in a test material. Unfortunately, spectroscopic measurements were not performed in shocked D{sub 2} during the course of the project. Some reasons are noted.
Date: March 27, 2006
Creator: Holmes, N. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FY04&05 LDRD Final Report Fission Fragment Sputtering

Description: Fission fragments born within the first 7 {micro}m of the surface of U metal can eject a thousand or more atoms per fission event. Existing data in the literature show that the sputtering yield ranges from 10 to 10,000 atoms per fission event near the surface, but nothing definitive is known about the energy of the sputtered clusters. Experimental packages were constructed allowing the neutron irradiation of natural uranium foils to investigate the amount of material removed per fission event a… more
Date: February 22, 2006
Creator: Ebbinghaus, B.; Trelenberg, T.; Meier, T.; Felter, T.; Sturgeon, J.; Kuboda, A. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FY05 LDRD Final Report Mapping Phonons at High-pressure

Description: In order to shed light on the intriguing, and not yet fully understood fcc-isostructural {gamma} {yields} {alpha} transition in cerium, we have begun an experimental program aimed at the determination of the pressure evolution of the transverse acoustic (TA) and longitudinal acoustic (LA) phonon dispersions up to and above the transition. {gamma}-Ce Crystals of 60-80 mm diameter and 20 mm thickness were prepared from a large ingot, obtained from Ames Lab, using laser cutting, micro-mechanical a… more
Date: February 10, 2006
Creator: Farber, D. L.; Antonangelli, D.; Beraud, A.; Krisch, M. & Aracne, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Water Infrastructure Financing: History of EPA Appropriations

Description: This report summarizes, in chronological order, congressional activity to fund items in the State and Tribal Assistance Grants (STAG) account since 1987. In appropriations legislation, funding for EPA (Environmental Protection Agency) wastewater assistance is contained in the measure providing funds for the Department of the Interior, Environment, and Related Agencies.
Date: January 19, 2006
Creator: Copeland, Claudia
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FY05 LDRD Final Report Technology Basis for Fluorescence Imaging in the Nuclear Domain (FIND)

Description: Work performed as a part of this ER sets the foundation for applications of high brightness light sources to important homeland security and nonproliferation problems. Extensive modeling has been performed with the aim to understand the performance of a class of interrogation systems that exploit nuclear resonance fluorescence to detect specific isotopes, of particular importance for national security and industry.
Date: February 13, 2006
Creator: Barty, C J
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FY05 LDRD Final Report Molecular Engineering of Electrodialysis Membranes 03-ERD-060

Description: Using a combination of modeling and experimental work we have developed a new method for purifying water that uses less energy than conventional methods and that can be made selective for removing targeted contaminants. The method uses nanoporous membranes that are permselective for anion or cation transfer. Ion selectivity results from double layer overlap inside the pores such that they dominantly contain ions opposite in charge to the surface charge of the membrane. Membrane charge can be ad… more
Date: February 22, 2006
Creator: Bourcier, W.; O'Brien, K.; Sawvel, A.; Johnson, M.; Bettencourt, K.; Letant, S. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FY05 LDRD Fianl Report Investigation of AAA+ protein machines that participate in DNA replication, recombination, and in response to DNA damage LDRD Project Tracking Code: 04-LW-049

Description: The AAA+ proteins are remarkable macromolecules that are able to self-assemble into nanoscale machines. These protein machines play critical roles in many cellular processes, including the processes that manage a cell's genetic material, but the mechanism at the molecular level has remained elusive. We applied computational molecular modeling, combined with advanced sequence analysis and available biochemical and genetic data, to structurally characterize eukaryotic AAA+ proteins and the protei… more
Date: December 4, 2006
Creator: Sawicka, D; de Carvalho-Kavanagh, M S; Barsky, D & Venclovas, C
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FY2005 Progress Summary and FY2006 Program Plan Statement of Work and Deliverables for Development of High Average Power Diode-Pumped Solid State Lasers, and Complementary Technologies, for Applications in Energy and Defense

Description: The primary focus this year was to operate the system with two amplifiers populated with and pumped by eight high power diode arrays. The system was operated for extended run periods which enabled average power testing of components, diagnostics, and controls. These tests were highly successful, with a demonstrated energy level of over 55 joules for 4 cumulative hours at a repetition rate of 10 Hz (average power 0.55 kW). In addition, high average power second harmonic generation was demonstrat… more
Date: March 24, 2006
Creator: Ebbers, C
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FY05 LDRD Final Report Coupled Turbulenc/Transport Model for Edge-Plasmas

Description: An edge-plasma simulation for tokamak fusion devices is developed that couples 3D turbulence and 2D transport, including detailed sources and sinks, to determine self-consistent steady-state plasma profiles. Relaxed iterative coupling is shown to be effective when edge turbulence is partially suppressed, for example, by shear E x B shear flow as occurs during the favorable H-mode region. Unsuppressed turbulence is found to lead to large, intermittent edge transport events where the coupling pro… more
Date: February 9, 2006
Creator: Rognlien, T.; Cohen, R.; LoDestro, L.; Palasek, R.; Umansky, M. & Xu, X.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FY05 LDRD Final ReportNanomaterials for Radiation Detection

Description: We have demonstrated that it is possible to enhance current radiation detection capability by manipulating the materials at the nano level. Fabrication of three-dimensional (3-D) nanomaterial composite for radiation detection has great potential benefits over current semiconductor- and scintillation-based technologies because of the precise control of material-radiation interaction and modulation of signal output. It is also a significant leap beyond current 2-D nanotechnology. Moreover, since … more
Date: February 6, 2006
Creator: Wang, T. F.; Letant, S. E.; Nikolic, R. J. & Chueng, C. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FY05 LDRD Final Report Sensor Fusion for Regional Monitoring of Nuclear Materials with Ubiquitous Detection

Description: The detection of the unconventional delivery of a nuclear weapon or the illicit transport of fissile materials is one of the most crucial, and difficult, challenges facing us today in national security. A wide array of radiation detectors are now being deployed domestically and internationally to address this problem. This initial deployment will be followed by radiation detection systems, composed of intelligent, networked devices intended to supplement the choke-point perimeter systems with m… more
Date: February 15, 2006
Creator: Labov, S E & Craig, W W
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FY05 LDRD Final ReportTime-Resolved Dynamic Studies using Short Pulse X-Ray Radiation

Description: Established techniques must be extended down to the ps and sub-ps time domain to directly probe product states of materials under extreme conditions. We used short pulse ({le} 1 ps) x-ray radiation to track changes in the physical properties in tandem with measurements of the atomic and electronic structure of materials undergoing fast laser excitation and shock-related phenomena. The sources included those already available at LLNL, including the picosecond X-ray laser as well as the ALS Femto… more
Date: February 10, 2006
Creator: Nelson, A; Dunn, J; van Buuren, T; Budil, K; Sadigh, B; Gilmer, G et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FY05 LDRD Final Report The Innermost Inner Core: Fact or Artifact?

Description: P'P' (PKPPKP) are P waves that travel from a hypocenter through the Earth's core, reflect from the free surface and travel back through the core to a recording station on the surface. Here we report the observations of hitherto unobserved near-podal P'P' waves (at epicentral distance < 10{sup o}) and very prominent precursors preceding the main energy by as much as 60 s. We interpret these precursors as a back-scattered energy from previously undocumented horizontally connected small-scale h… more
Date: January 9, 2006
Creator: Tkalcic, H; Flanagan, M P & Mogri, H
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FY05 LDRD Final Report Chemical Dynamics At Interfaces

Description: At high pressure and temperature, the phase diagram of elemental carbon is poorly known. We present predictions of diamond and BC8 melting lines and their phase boundary in the solid phase, as obtained from first principles calculations. Maxima are found in both melting lines, with a triple point located at {approx} 850 GPa and {approx} 7400 K. Our results show that hot, compressed diamond is a semiconductor which undergoes metalization upon melting. In contrast, in the stability range of BC8, … more
Date: February 9, 2006
Creator: Schwegler, E; Ogitsu, T; Bonev, S; Correa, A; Militzer, B & Galli, G
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FY05 LDRD Final Report Molecular Radiation Biodosimetry LDRD Project Tracking Code: 04-ERD-076

Description: In the event of a nuclear or radiological accident or terrorist event, it is important to identify individuals that can benefit from prompt medical care and to reassure those that do not need it. Achieving these goals will maximize the ability to manage the medical consequences of radiation exposure that unfold over a period of hours, days, weeks, years, depending on dose. Medical interventions that reduce near term morbidity and mortality from high but non-lethal exposures require advanced med… more
Date: February 3, 2006
Creator: Jones, I. M.; A.Coleman, M.; Lehmann, J.; Manohar, C. F.; Marchetti, F.; Mariella, R. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FY05 LDRD Final Report A Computational Design Tool for Microdevices and Components in Pathogen Detection Systems

Description: We have developed new algorithms to model complex biological flows in integrated biodetection microdevice components. The proposed work is important because the design strategy for the next-generation Autonomous Pathogen Detection System at LLNL is the microfluidic-based Biobriefcase, being developed under the Chemical and Biological Countermeasures Program in the Homeland Security Organization. This miniaturization strategy introduces a new flow regime to systems where biological flow is alrea… more
Date: February 7, 2006
Creator: Trebotich, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FY05 LDRD Final Report, A Revolution in Biological Imaging

Description: X-ray free-electron lasers (XFELs) are currently under development and will provide a peak brightness more than 10 orders of magnitude higher than modern synchrotrons. The goal of this project was to perform the fundamental research to evaluate the possibility of harnessing these unique x-ray sources to image single biological particles and molecules at atomic resolution. Using a combination of computational modeling and experimental verification where possible, they showed that it should indee… more
Date: January 20, 2006
Creator: Chapman, H. N.; Bajt, S.; Balhorn, R.; Barty, A.; Barsky, D.; Bogan, M. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Defense Authorization and Appropriations Bills: FY1970-FY2006

Description: This report is a research aid, which lists the DOD authorization bills (Table 1) and appropriations bills (Table 2). This report includes all the pertinent information on the passage of these bills through the legislative process: bill numbers, report numbers, dates reported and passed, recorded vote numbers and vote tallies, dates of passage of the conference reports with their numbers and votes, vetoes, substitutions, dates of final passage, and public law numbers. Table 3 shows real growth o… more
Date: June 13, 2006
Creator: Coipuram, Thomas, Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Defense Authorization and Appropriation Bills: FY1970-FY2006

Description: This report is a research aid, which lists the DOD authorization bills (Table 1) and appropriations bills (Table 2). This report includes all the pertinent information on the passage of these bills through the legislative process: bill numbers, report numbers, dates reported and passed, recorded vote numbers and vote tallies, dates of passage of the conference reports with their numbers and votes, vetoes, substitutions, dates of final passage, and public law numbers. Table 3 shows real growth o… more
Date: April 21, 2006
Creator: Coipuram, Thomas, Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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