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Conceptual design of a laser fusion power plant

Description: A conceptual design of a laser fusion power plant is extensively discussed. Recent advances in high gain targets are exploited in the design. A smaller blanket structure is made possible by use of a thick falling region of liquid lithium for a first wall. Major design features of the plant, reactor, and laser systems are described. A parametric analysis of performance and cost vs. design parameters is presented to show feasible design points. A more definitive follow-on conceptual design study … more
Date: July 14, 1977
Creator: Maniscalco, J. A.; Meier, W. R. & Monsler, M. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Multifragmentation in intermediate energy heavy ion collisions

Description: The GSL/LBL plastic ball/wall detector system was used to gain insight into the fragment production mechanism in Au + Au and Au + Fe reactions. Full azimuthal coverage for light particles (p,d,t,/sup 3/He,/sup 4/He) and intermediate mass fragments (z greater than 10) is achieved in the forward hemisphere in the center of mass system. The complete measurement of light particles allowed a global analysis of the events and a search for collective effects in fragment emission by comparing to flow e… more
Date: April 14, 1986
Creator: Jacak, B. V.; Britt, H. C.; Claesson, G.; Doss, K. G. R.; Ferguson, R.; Gavron, A. I. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Capture cross section and gamma-ray spectrum calculations for medium-weight nuclei. [Double-peak, energy-dependent Breit-Wigner model]

Description: A double-peak, energy-dependent Breit-Wigner model of the E1 gamma-ray strength function was applied to nuclei from As to Rh, to predict their neutron capture cross sections and capture gamma-ray spectra. A consistent set of model parameters was obtained in this mass region to describe the step in the low-energy tail of the E1 strength function. This step allows agreement with photonuclear data at high energies, the correct GAMMA/sub gamma/ to be obtained for agreement with neutron capture cros… more
Date: November 14, 1979
Creator: Gardner, M. A. & Gardner, D. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Structural Genomics of Minimal Organisms: Pipeline and Results

Description: The initial objective of the Berkeley Structural Genomics Center was to obtain a near complete three-dimensional (3D) structural information of all soluble proteins of two minimal organisms, closely related pathogens Mycoplasma genitalium and M. pneumoniae. The former has fewer than 500 genes and the latter has fewer than 700 genes. A semiautomated structural genomics pipeline was set up from target selection, cloning, expression, purification, and ultimately structural determination. At the ti… more
Date: September 14, 2007
Creator: Kim, Sung-Hou; Shin, Dong-Hae; Kim, Rosalind; Adams, Paul & Chandonia, John-Marc
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
open access

Decomposition of the Multistatic Response Matrix and Target Characterization

Description: Decomposition of the time-reversal operator for an array, or equivalently the singular value decomposition of the multistatic response matrix, has been used to improve imaging and localization of targets in complicated media. Typically, each singular value is associated with one scatterer even though it has been shown in several cases that a single scatterer can generate several singular values. In this paper we review the analysis of the time-reversal operator (TRO), or equivalently the multis… more
Date: February 14, 2008
Creator: Chambers, D H
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Odd-Z Transactinide Compound Nucleus Reactions Including the Discovery of 260Bh

Description: Several reactions producing odd-Z transactinide compound nuclei were studiedwith the 88-Inch Cyclotron and the Berkeley Gas-Filled Separator at the LawrenceBerkeley National Laboratory. The goal was to produce the same compound nucleus ator near the same excitation energy with similar values of angular momentum via differentnuclear reactions. In doing so, it can be determined if there is a preference in entrancechannel, because under these experimental conditions the survival portion of Swiatec… more
Date: May 14, 2008
Creator: Nelson, Sarah L & Nelson, Sarah L
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Suppression of Stimulated Brillouin Scattering in multiple-ion species inertial confinemen fusion Hohlraum Plasmas

Description: A long-standing problem in the field of laser-plasma interactions is to successfully employ multiple-ion species plasmas to reduce stimulated Brillouin scattering (SBS) in inertial confinement fusion (ICF) hohlraum conditions. Multiple-ion species increase significantly the linear Landau damping for acoustic waves. Consequently, recent hohlraum designs for indirect-drive ignition on the National Ignition Facility investigate wall liner material options so that the liner gain for parametric inst… more
Date: May 14, 2007
Creator: Neumayer, P
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Devloping High Energy Radiography for HED Experiments on NIF and Omega-EP

Description: High energy radiography capabilities are essential for many future DNT/HED experiments on NIF. We have been developing bright, high-energy (15-100 keV), high resolution (< 20 {micro}m), 1-D and 2-D radiography solutions for DNT experiments on NIF. In this LDRD, we have made significant progress utilizing high-energy, high-intensity, short-pulse lasers to generate hard K-{alpha} photons. High energy K-{alpha} sources are created by hot electrons interacting in the target fluor material after … more
Date: February 14, 2008
Creator: Maddox, B.; Tommasini, R.; Remington, B.; Key, M. & Town, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Discrimination Report: A Multisensor system for detection andcharacterization of UXO, ESTCP Project MM-0437,

Description: The Berkeley UXO Discriminator (BUD) is an optimally designed active electromagnetic system that not only detects but also characterizes UXO. The performance of the system is governed by a target size-depth curve. BUD was designed to detect UXO in the 20 mm to 155 mm size range for depths between 0 and 1.5 m, and to characterize them in a depth range from 0 to 1.1 m. The system incorporates three orthogonal transmitters and eight pairs of differenced receivers. Eight receiver coils are placed h… more
Date: January 14, 2008
Creator: Gasperikova, Erika; Smith, J. Torquil; Morrison, H.Frank & Becker,Alex
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Final-State Interactions and Single-Spin Asymmetries in Semi-inclusive Deep Inelastic Scattering

Description: Recent measurements from the HERMES and SMC collaborations show a remarkably large azimuthal single-spin asymmetries A{sub UL} and A{sub UT} of the proton in semi-inclusive pion leptoproduction {gamma}*(q)p {yields} {pi}X. We show that final-state interactions from gluon exchange between the outgoing quark and the target spectator system leads to single-spin asymmetries in deep inelastic lepton-proton scattering at leading twist in perturbative QCD; i.e., the rescattering corrections are not po… more
Date: November 14, 2007
Creator: Brodsky, Stanley J.; Hwang, Dae Sung & Schmidt, Ivan
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Metal-containing plasma-polymerized coatings for laser-fusion targets

Description: Addition of metal to plastic layers in some direct drive laser fusion targets is needed to reduce electron induced fuel preheat. A plasma polymerization coating system was constructed to produce a metal seeded polymer by adding an organometallic gas to the usual trans-2-butene and hydrogen feedstocks. Since organometallic gases are highly reactive and toxic, safety is a major concern in the design of a coating system. Our coating apparatus was designed with three levels of containment to assure… more
Date: September 14, 1981
Creator: Letts, S. A. & Jordan, C. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Integrated system of production of neutronics and photonics calculational constants. Volume 21, Part A. Maxwell-averaged reaction rates (sigma v-bar) for selecteed reactions between ions with atomic mass less than or equal to 11

Description: Maxwell-averaged reaction rates (sigma v-bar) are presented for 24 interactions between /sup 1/H, /sup 2/H, /sup 3/H, /sup 3/He, /sup 4/He, /sup 6/Li, /sup 7/Li, /sup 10/B, and /sup 11/B ions. The reactions rates are calculated by use of the evaluated data of the LLL Evaluated Nuclear Data Library (ENDL). 5 figures, 5 tables.
Date: February 14, 1979
Creator: Howerton, Robert J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Laser-plasma coupling

Description: The following topics are discribed: (1) ionization of target, (2) electromagnetic wave propagation in plasma, (3) collisional absorption, (4) light absorption in collisionless plasma, (5) resonance absorption, (6) instabilities, (7) Brillowin instability, and (8) some other effects. (MOW
Date: November 14, 1978
Creator: Kruer, W.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Shielding a Streak Camera from Hard X-rays

Description: The targets used in the Hot Halfraum Campaign at OMEGA create many hot electrons, which result in a large flux of hard x-rays. The hard x-rays produce a high background in the streak camera. The background was significantly reduced by wrapping the streak camera with a high-Z material; in this case, 1/8' of Pb. The large hard x-ray flux also adds noise to images from framing cameras which use CCDs.
Date: April 14, 2004
Creator: Schneider, M.; Sorce, C.; Loughman, K.; Emig, J.; Bruns, H.; Back, C. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

General Constraints on Cross Sections Deduced from Surrogate Reactions

Description: Cross sections that cannot be measured in the laboratory, e.g. because the target lifetime is too short, can be inferred indirectly from a different reaction forming the same compound system, but with a more accessible beam/target combination (the ''surrogate-reaction'' technique). The reactions share the same compound system and a common decay mechanism, but they involve different formation processes. Therefore, an implicit constraint is imposed on the inferred cross section deduced from the m… more
Date: August 14, 2003
Creator: Younes, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparison of CDMS [100] and [111] Oriented Germanium Detectors

Description: The Cryogenic Dark Matter Search (CDMS) utilizes large mass, 3-inch diameter x 1-inch thick target masses as particle detectors. The target is instrumented with both phonon and ionization sensors and comparison of energy in each channel provides event-by-event classification of electron and nuclear recoils. Fiducial volume is determined by the ability to obtain good phonon and ionization signal at a particular location. Due to electronic band structure in germanium, electron mass is described b… more
Date: September 14, 2012
Creator: Leman, S. W.; Hertel, S. A.; /MIT, MKI; Kim, P.; /SLAC; Cabrera, B. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Hohlraum Target Alignment from X-ray Detector Images using Starburst Design Patterns

Description: National Ignition Facility (NIF) is a high-energy laser facility comprised of 192 laser beams focused with enough power and precision on a hydrogen-filled spherical, cryogenic target to initiate a fusion reaction. The target container, or hohlraum, must be accurately aligned to an x-ray imaging system to allow careful monitoring of the frozen fuel layer in the target. To achieve alignment, x-ray images are acquired through starburst-shaped windows cut into opposite sides of the hohlraum. When t… more
Date: December 14, 2010
Creator: Leach, R. R.; Conder, A.; Edwards, O.; Kroll, J.; Kozioziemski, B.; Mapoles, E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

System Modeling of kJ-class Petawatt Lasers at LLNL

Description: Advanced Radiographic Capability (ARC) project at the National Ignition Facility (NIF) is designed to produce energetic, ultrafast x-rays in the range of 70-100 keV for backlighting NIF targets. The chirped pulse amplification (CPA) laser system will deliver kilo-Joule pulses at an adjustable pulse duration from 1 ps to 50 ps. System complexity requires sophisticated simulation and modeling tools for design, performance prediction, and comprehension of experimental results. We provide a brief o… more
Date: April 14, 2010
Creator: Shverdin, M Y; Rushford, M; Henesian, M A; Boley, C; Haefner, C; Heebner, J E et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

China Energy and Emissions Paths to 2030

Description: After over two decades of staggering economic growth and soaring energy demand, China has started taking serious actions to reduce its economic energy and carbon intensity by setting short and medium-term intensity reduction targets, renewable generation targets and various supporting policies and programs. In better understanding how further policies and actions can be taken to shape China's future energy and emissions trajectory, it is important to first identify where the largest opportuniti… more
Date: January 14, 2011
Creator: Fridley, David; Zheng, Nina; Zhou, Nan; Ke, Jing; Hasanbeigi, Ali; Morrow, Bill et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

T2Well/ECO2N Version 1.0: Multiphase and Non-Isothermal Model for Coupled Wellbore-Reservoir Flow of Carbon Dioxide and Variable Salinity Water

Description: At its most basic level, the injection of CO{sub 2} into geologic CO{sub 2} storage sites involves a system comprising the wellbore and the target reservoir. The wellbore is the only conduit available to emplace CO{sub 2} into reservoirs for long-term storage. At the same time, wellbores in general have been identified as the most likely conduit for CO{sub 2} and brine leakage from geologic carbon sequestration (GCS) sites, especially those in sedimentary basins with historical hydrocarbon prod… more
Date: February 14, 2011
Creator: Pan, L.; Oldenburg, C.M.; Wu, Y.-S. & Pruess, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Petascale Computing Enabling Technologies Project Final Report

Description: The Petascale Computing Enabling Technologies (PCET) project addressed challenges arising from current trends in computer architecture that will lead to large-scale systems with many more nodes, each of which uses multicore chips. These factors will soon lead to systems that have over one million processors. Also, the use of multicore chips will lead to less memory and less memory bandwidth per core. We need fundamentally new algorithmic approaches to cope with these memory constraints and the … more
Date: February 14, 2010
Creator: de Supinski, B R
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Concept for a Low Pressure Noble Gas Fill Intervention in the IFE Fusion Test Facility (FTF) Target Chamber

Description: An engineering evaluation has been initiated to investigate conceptual engineering methods for implementing a viable gas shield strategy in the Fusion Test Facility (FTF) target chamber. The employment of a low pressure noble gas in the target chamber to thermalize energetic helium ions prior to interaction with the wall could dramatically increase the useful life of the first wall in the FTF reactor1. For the purpose of providing flexibility, two target chamber configurations are addressed: a … more
Date: January 14, 2010
Creator: C.A. Gentile, W.R. Blanchard, T.A. Kozub, M. Aristova, C. McGahan, S. Natta, K. Pagdon, J. Zelenty
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Neutron Capture Cross Section Measurement on $^{238}$Pu at DANCE

Description: The proposed neutron capture measurement for {sup 238}Pu was carried out in Nov-Dec, 2010, using the DANCE array at LANSCE, LANL. The total beam-on-target time is about 14 days plus additional 5 days for the background measurement. The target was prepared at LLNL with the new electrplating cell capable of plating the {sup 238}Pu isotope simultaneously on both sides of the 3-{micro}m thick Ti backing foil. A total mass of 395 {micro}g with an activity of 6.8 mCi was deposited onto the area of 7 … more
Date: February 14, 2011
Creator: Chyzh, A & Wu, C Y
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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