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Material dynamics at extreme pressures and strain rates

Description: Solid state experiments at extreme pressures (10-100 GPa) and strain rates ({approx}10{sup 6}-10{sup 8}s{sup -1}) are being developed on high-energy laser facilities, and offer the possibility for exploring new regimes of materials science. [Re 2004] These extreme solid-state conditions can be accessed with either shock loading or with quasi-isentropic ramped pressure pulses being developed on the Omega laser. [Ed 2004] Velocity interferometer measurements establish the high strain rates. Const… more
Date: August 25, 2004
Creator: Remington, Bruce A.; Cavallo, Rob M.; Edwards, Michael J.; Ho, David D.; Lasinski, Barbara F.; Lorenz, Karl T. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Shot Planning and Analysis Tools

Description: Shot planning and analysis tools (SPLAT) integrate components necessary to help achieve a high over-all operational efficiency of the National Ignition Facility (NIF) by combining near and long-term shot planning, final optics demand and supply loops, target diagnostics planning, and target fabrication requirements. Currently, the SPLAT project is comprised of two primary tool suites for shot planning and optics demand. The shot planning component provides a web-based interface to selecting and… more
Date: July 25, 2011
Creator: Casey, A.; Beeler, R.; Conder, A.; Fallejo, R.; Flegel, M.; Hutton, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Ignition Capsules with Aerogel-Supported Liquid DT Fuel For The National Ignition Facility

Description: For high repetition-rate fusion power plant applications, capsules with aerogel-supported liquid DT fuel can have much reduced fill time compared to {beta}-layering a solid DT fuel layer. The melting point of liquid DT can be lowered once liquid DT is embedded in an aerogel matrix, and the DT vapor density is consequently closer to the desired density for optimal capsule design requirement. We present design for NIF-scale aerogel-filled capsules based on 1-D and 2-D simulations. An optimal conf… more
Date: October 25, 2011
Creator: Ho, D D; Salmonson, J D; Clark, D S; Lindl, J D; Haan, S W; Amendt, P et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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National Ignition Facility and Managing Location, Component, and State

Description: The National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory is a stadium-sized facility that contains a 192-beam, 1.8-Megajoule, 500-Terawatt, ultraviolet laser system coupled with a 10-meter diameter target chamber. There are over 6,200 Line Replaceable Units (LRUs) comprised of more than 104,000 serialized parts that make up the NIF. Each LRU is a modular unit typically composed of a mechanical housing, laser optics (glass, lenses, or mirrors), and utilities. To date, t… more
Date: July 25, 2011
Creator: Foxworthy, C.; Fung, T.; Beeler, R.; Li, J.; Dugorepec, J. & Chang, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Hard X-ray Imaging for Measuring Laser Absorption Spatial Profiles on the National Ignition Facility

Description: Hard x-ray (''Thin wall'') imaging will be employed on the National Ignition Facility (NIF) to spatially locate laser beam energy deposition regions on the hohlraum walls in indirect drive Inertial Confinement Fusion (ICF) experiments, relevant for ICF symmetry tuning. Based on time resolved imaging of the hard x-ray emission of the laser spots, this method will be used to infer hohlraum wall motion due to x-ray and laser ablation and any beam refraction caused by plasma density gradients. In o… more
Date: April 25, 2006
Creator: Dewald, E L; Jones, O S; Landen, O L; Suter, L; Amendt, P; Turner, R E et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development and Testing of the NIF Prototype Module

Description: The NIF Power Conditioning System (PCS) is required to deliver -68 kJ to each of the 3840 flashlamp pairs in the NIF laser in a current pulse with a peak of -500 kA and rise time of- 150 µs. The PCS will consist of 192 modules each of which drive 20 lamp-pairs. Each module will basically be a 6 rnF capacitor bank with a nominal charge voltage of 23.5 kV which is switched by a single pressurized air gas switch to 20 RG-220 cables that are connected to individual lamp loads. In addition eac… more
Date: June 25, 1999
Creator: Adcock, J.; Harjes, C.; Mowrer, G. & Wilson, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Scope of Work for Integration Management and Installation Services of the National Ignition Facility Beampath Infrastructure System

Description: The goal of the National Ignition Facility (NIF) project is to provide an aboveground experimental capability for maintaining nuclear competence and weapons effects simulation and to provide a facility capable of achieving fusion ignition using solid-state lasers as the energy driver. The facility will incorporate 192 laser beams, which will be focused onto a small target located at the center of a spherical target chamber--the energy from the laser beams will be deposited in a few billionths o… more
Date: April 25, 2000
Creator: Coyle, P.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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X-Ray Backlighting for the National Ignition Facility

Description: X-ray backlighting is a powerful tool for diagnosing a large variety of high-energy-density phenomena. Traditional area backlighting techniques used at Nova and Omega cannot be extended efficiently to NIF-scale. New, more efficient backlighting sources and techniques are required and have begun to show promising results. These include a backlit-pinhole point projection technique, pinhole and slit arrays, distributed polychromatic sources, and picket fence backlighters. In parallel, there have b… more
Date: July 25, 2000
Creator: Landen, O. L.; Farley, D. R.; Glendinning, S. G.; Logory, E. M.; Bell, P. M.; Koch, J. A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Oracle Database DBFS Hierarchical Storage Overview

Description: The National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory creates large numbers of images during each shot cycle for the analysis of optics, target inspection and target diagnostics. These images must be readily accessible once they are created and available for the 30 year lifetime of the facility. The Livermore Computing Center (LC) runs a High Performance Storage System (HPSS) that is capable of storing NIF's estimated 1 petabyte of diagnostic images at a fraction of… more
Date: July 25, 2011
Creator: Rivenes, A
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Focal Length Measurements for the National Ignition Facility Large Lenses

Description: The focal length of the spatial filter and final focus lenses for the National Ignition Facility are measured to < {+-} 0.01% using a combination of master lenses and production-oriented techniques for relative focal length.
Date: January 25, 2002
Creator: Parham, T G; McCarville, T J; Johnson, M A & Kiikka, C
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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National NIF Diagnostic Program Interim Management Plan

Description: The National Ignition Facility (NIF) has the mission of supporting Stockpile Stewardship and Basic Science research in high-energy-density plasmas. To execute those missions, the facility must provide diagnostic instrumentation capable of observing and resolving in time events and radiation emissions characteristic of the plasmas of interest. The diagnostic instrumentation must conform to high standards of operability and reliability within the NIF environment. These exacting standards, togethe… more
Date: April 25, 2002
Creator: Warner, B
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Software solutions manage the definition, operation, maintenance and configuration control of the National Ignition Facility

Description: The National Ignition Facility (NIF) is the world's largest laser composed of millions of individual parts brought together to form one massive assembly. Maintaining control of the physical definition, status and configuration of this structure is a monumental undertaking yet critical to the validity of the shot experiment data and the safe operation of the facility. The NIF business application suite of software provides the means to effectively manage the definition, build, operation, mainten… more
Date: July 25, 2011
Creator: Dobson, D.; Churby, A.; Krieger, E.; Maloy, D. & White, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Use of the target diagnostic control system in the National Ignition Facility

Description: The extreme physics of targets shocked by NIF's 192-beam laser are observed by a diverse suite of diagnostics including optical backscatter, time-integrated, time resolved and gated X-ray sensors, laser velocity interferometry, and neutron time of flight. Diagnostics to diagnose fusion ignition implosion and neutron emissions have been developed. A Diagnostic Control System (DCS) for both hardware and software facilitates development and eases integration. Each complex diagnostic typically uses… more
Date: July 25, 2011
Creator: Shelton, R; Lagin, L & Nelson, J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The National Ignition Facility: The Path to Ignition, High Energy Density Science and Inertial Fusion Energy

Description: The National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory (LLNL) in Livermore, CA, is a Nd:Glass laser facility capable of producing 1.8 MJ and 500 TW of ultraviolet light. This world's most energetic laser system is now operational with the goals of achieving thermonuclear burn in the laboratory and exploring the behavior of matter at extreme temperatures and energy densities. By concentrating the energy from its 192 extremely energetic laser beams into a mm{sup 3}-siz… more
Date: March 25, 2011
Creator: Moses, Edward
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Soft x-ray spectrometer operation at the National Ignition Facility

Description: Radiation drive diagnostics during the NIF early light campaign was supported by an 18 channel soft x-ray spectrometer (Dante). In order to achieve a measurement accuracy of 2% in radiation temperature absolute calibration of the individual channels was necessary and signal distortion through long transmission lines had to be compensated for as well. For fast signals the signal attenuation due to the long (50m) cables amounted to {approx} 20% {at} 100MHz, which was corrected by a cable compensa… more
Date: April 25, 2006
Creator: Schein, J.; Dewald, E.; Campbell, K.; Turner, R.; Weber, F.; Rhodes, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Best Angle to Orient Two Intersecting Lines

Description: Fiducials in the form of intersecting straight lines are used to align the target in the final target chamber of the National Ignition Facility of Lawrence Livermore National Laboratory. One of the techniques used to locate these lines is the Hough transform. When two lines intersect at a 90 degree angle, it is tempting to orient the lines to horizontal and vertical directions. There are other possible angles at which the lines may be oriented. One question that arises while designing the fiduc… more
Date: July 25, 2006
Creator: Awwal, A. S.; Ferguson, S. W. & Shull, P. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Propagation modeling in two transverse dimensions of the National Ignition Facility baseline performance

Description: The performance of the NIF baseline design has been modeled in two transverse dimensions using the Fourier optics code PROP92 and the nonlinear harmonic conversion code THG4DO1. The results obtained are in good agreement with those of the ID versions of these codes which were used during the design optimization, yielding good confidence that a near- optimal design has been chosen. We project that this design is able to fulfill NIF`s three major mission specifications without component damage. F… more
Date: February 25, 1997
Creator: Sacks, R. A.; Williams, W. W.; Henesian, M. A.; Orth, C. D.; Haney, S. W.; Trenholme, J. B. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Characterization of third-harmonic target plane irradiance on the National Ignition Facility Beamlet demonstration project

Description: The Beamlet laser is a single-aperture prototype for the National Ignition Facility (NIF). We have recently installed and activated a 55 m{sup 3} vacuum vessel and associated diagnostic package at the output of the Beamlet that we are using to characterize target plane irradiance at high power. Measurements obtained both with and without a kinoform diffractive optic are reported. Dependences on critical laser parameters including output power, spatial filtering, and wavefront correction are dis… more
Date: April 25, 1997
Creator: Wegner, P. J.; Van Wonterghem, B. M.; Dixit, S. N.; Henesian, M. A.; Barker, C. E.; Thompson, C. E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Strongly-driven laser plasma coupling

Description: An improved understanding of strongly-driven laser plasma coupling is important for optimal use of the National Ignition Facility (NIF) for both inertial fusion and for a variety of advanced applications. Such applications range from high energy x- ray sources and high temperature hohlraums to fast ignition and laser radiography. We discuss a novel model for the scaling of strongly-driven stimulated Brillouin and Raman scattering. This model postulates an intensity dependent correlation length … more
Date: June 25, 1998
Creator: Suter, L; Afeyan, B; Campbell, E M; Decker, C D; Kruer, W L; Moody, J et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Z-Pinch Generated X-Rays in Static-Wall Hohlraum Geometry Demonstrate Potential for Indirect-Drive ICF Studies

Description: Hohlraums of full ignition scale (6-mm diameter by 7-mm length) have been heated by x-rays from a z-pinch target on Z to a variety of temperatures and pulse shapes which can be used to simulate the early phases of the National Ignition Facility (NIF) temperature drive. The pulse shape is varied by changing the on-axis target of the z pinch in a static-wall-hohlraum geometry. A 2-{micro}m-thick walled Cu cylindrical target of 8-mm diameter filled with 10 mg/cm{sup 3} CH, for example, produces fo… more
Date: August 25, 1999
Creator: Sandord, T. W. L.; Olson, R. E.; Chandler, G. A.; Hebron, D. E.; Mock, R. C.; Leeper, R. J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Frequency converter design and manufacturing considerations for the National Ignition Facility

Description: The National Ignition Facility (NIF), being constructed at Lawrence Livermore National Laboratory (LLNL), comprises 192 laser beams, Figure 1. The lasing medium is neodymium in phosphate glass with a fundamental frequency (1{omega}) of 1.053 {micro}m. Sum frequency generation in a pair of conversion crystals (KDP/KD*P) produces 1.8 Mj of the third harmonic light (3{omega} or {lambda}=0.35). On NIF the frequency conversion crystals are part of the Final Optics Assembly (FOA), whose two principal… more
Date: March 25, 1998
Creator: Hibbard, R. L.; English, R. E., Jr.; De Yoreo, J. J. & Montesanti, R. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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