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Fiber array technique for subnanosecond x-ray framing camera

Description: A subnanosecond x-ray framing camera technique employing a fiber optics image dissector coupled to a 10 ps optical streak camera will be described. The output data from the streak camera can be reduced from photographic film or directly couple into a SEC Vidicon camera for immediate computer decoding of each scan line into a two dimensional picture. The use of the new subnanosecond plastic scintillator in front of the fiber optics dissector will also be discussed. The paper will include (1) the… more
Date: August 16, 1976
Creator: Cheng, J. C.; Multhauf, L. G. & Tripp, G. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The National Ignition Facility: Status and Plans for Laser Fusion and High-Energy-Density Experimental Studies

Description: The National Ignition Facility (NIF), currently under construction at the University of California's Lawrence Livermore National Laboratory, is a stadium-sized facility containing a 192-beam, 1.8-Megajoule, 500-Terawatt, 351-nm laser system and a 10-meter diameter target chamber with room for nearly 100 experimental diagnostics. NIF is being built by the National Nuclear Security Administration and when completed will be the world's largest laser experimental system, providing a national center… more
Date: October 16, 2002
Creator: Moses, E I & Wuest, C R
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Laser fusion diagnostics

Description: High temporal and spatial resolution optical diagnostics of laser performance, energy balance, and applicable plasma probing techniques are reviewed. A variety of spatially, temporally and spectrally resolved x-ray diagnostics techniques and instruments are discussed. Particular emphasis is on high spatial resolution imaging techniques and applications and on high temporal resolution x-ray streak caera applications to exploding pusher target experiments. Finally, particle diagnostics and system… more
Date: August 16, 1978
Creator: Coleman, L.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Optical guiding in a free electron laser

Description: The coherent interaction between an optical wave and an electron beam in a free electron laser (FEL) is shown to be capable of optically guiding the light. The effect is analyzed using a two-dimensional approximation for the FEL equations, and using the properties of optical fibers. Results of two-dimensional (cylindrically symmetric) numerical simulations are presented, and found to agree reasonably well with the analytically derived criterion for guiding. Under proper conditions, the effect c… more
Date: October 16, 1984
Creator: Scharlemann, E. T.; Sessler, A. M. & Wurtele, J. S.
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Partner: UNT Libraries Government Documents Department
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Inertial confinement fusion: present status and future potential

Description: Power from inertial confinement fusion holds much promise for society. This paper points out many of the benefits relative to combustion of hydrocarbon fuels and fission power. Potential problems are also identified and put in perspective. The progress toward achieving inertial fusion power is described and results of recent work at the Lawrence Livermore National Laboratory are presented. Key phenomenological uncertainties are described and experimental goals for the Nova laser system are give… more
Date: July 16, 1984
Creator: Hogan, W.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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850 J, 150 ns narrow-band krypton fluoride laser

Description: We report laser experiments on a 248 nm KrF laser with a 30x40x120 cm gain volume and an injection locked unstable resonator cavity. The volume is pumped by six 450 kV, 90 kA electron beam generators using water pulse forming lines.
Date: December 16, 1983
Creator: Goldhar, J.; Jancaitis, K. S.; Murray, J. R. & Schlitt, L. G.
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Partner: UNT Libraries Government Documents Department
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Design of neutron streak camera for fusion diagnostics

Description: In laser fusion, such as with the NOVA under construction at the Lawrence Livermore National Laboratory, the D-T reaction is expected to be complete within 100 ps. It is important to measure the time-dependence of the neutron flux from the fusion target. We describe the design of a new neutron detector of 20 ps resolving time that can be used to study the history of fusion burn.
Date: June 16, 1981
Creator: Wang, C. L.; Kalibjian, R. & Singh, M. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Laser fusion diagnostics

Description: High temporal and spatial resolution optical diagnostics of laser performance, energy balance, and applicable plasma probing techniques are reviewed. A variety of spatially, temporally and spectrally resolved x-ray diagnostics techniques and instruments as discussed. Particular emphasis is on high spatial resolution imaging techniques and applications and on high temporal resolution x-ray streak camera applications to exploding pusher target experiments. Finally, particle diagnostics and system… more
Date: August 16, 1978
Creator: Coleman, L.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The equation of state of liquid Flibe

Description: Flibe (Li{sub 2}BeF{sub 4}) is a candidate material for the liquid blanket in the HYLIFE-2 fusion reactor. The thermodynamic properties of the material are important for the study of thermohydraulic behavior of the concept design, including the compressible analysis of the blanket isochoric heating problem and resulting jet breakup. The equation of state provides the relationship between all the thermodynamic properties. Previously, a soft sphere model of liquid equation of state was used for d… more
Date: August 16, 1991
Creator: Chen, Xiang M.; Schrock, V.E. & Peterson, P.F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The analysis of the Flibe jets in HYLIFE-II

Description: In the HYLIFE-2 Inertial Confinement Fusion reactor, an array of Flibe (Li{sub 2}BeFe{sub 4}) jets is designed to protect the chamber from the fusion radiation. During the fusion pulse the Flibe jets sustain an instantaneous neutron and X-ray heating. The high energy neutrons from fusion can penetrate deep into the Flibe jets and the sudden increase in internal energy can induce a great pressure rise inside the jets. The subsequent relaxation of the jets is important for the reactor design, bec… more
Date: August 16, 1991
Creator: Chen, Xiang M.; Schrock, V.E. & Peterson, P.F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Mass spectrometer determination of argon contents in laser fusion target pellets

Description: A system for measuring argon contents in individual laser fusion targets using a getter pumped closed volume quadrupole mass spectrometer has been developed. Accuracy of 10% can be obtained, limited by the calibration standard and electron multiplier drift. Measurements are simple, unambiguous and can be performed at up to one per hour with a sensitivity equivalent to 1 x 10/sup 3/ Pa (.01 atm) argon in a 140 ..mu..m internal diameter sphere.
Date: April 16, 1979
Creator: Ward, C. M. & Bergquist, L. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Improving the bulk laser-damage resistance of KDP by baking and pulsed-laser irradiation

Description: Isolated bulk damage centers are produced when KDP crystals are irradiated by 1-ns 1064-nm pulses. We have tested about 100 samples and find the median threshold to be 7 J/cm/sup 2/ when the samples are irradiated only once at each test volume (1-on-1 tests). The median threshold increased to 11 J/cm/sup 2/ when the test volumes were first subjected to subthreshold laser irradiation (n-on-1 tests). We baked several crystals at temperatures from 110 to 165/sup 0/C and remeasured their thresholds… more
Date: September 16, 1981
Creator: Swain, J.E.; Stokowski, S.E.; Milam, D. & Rainer, F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Chamber propagation

Description: Propagation of a heavy ion beam to the target appears possible under conditions thought to be realizable by several reactor designs. Beam quality at the lens is believed to provide adequate intensity at the target -- but the beam must pass through chamber debris and its self fields along the way. This paper reviews present consensus on propagation modes and presents recent results on the effects of photoionization of the beam ions by thermal x-rays from the heated target. Ballistic propagation … more
Date: January 16, 1991
Creator: Langdon, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ICF special studies: Final report

Description: This paper summarizes the work completed by W.J. Schafer Associates for Lawrence Livermore National Laboratory in the area of Inertial Confinement Fusion. The SAFIRE (Systems Analysis Code for ICF Reactor Economics) code is one of the major tasks discussed. (LSP)
Date: September 16, 1987
Creator: Meier, W. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An IFE development strategy

Description: The development of inertial fusion as a power source will require achieving four principal milestones: ignition and propagating burn; high gain at low drive energy for the reactor driver; pulse repetition rates of a few Hz; and long-term reliability and economics of a reactor. To keep development time and costs to a minimum, these should be accomplished with as few major facilities as possible. A viable scenario for the Inertial Fusion Energy (IFE) Program would include establishing the first m… more
Date: July 16, 1991
Creator: Hogan, W.J.; Storm, E. & Lindl, J.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Richtmyer-Meshkov instabilities in stratified fluids

Description: We present an analytic theory of Richtmyer-Meshkov instabilities in an arbitrary number N of stratified fluids subjected to a shock. Following our earlier work on Rayleigh-Taylor instabilities, the theory assumes incompressible flow in which a shock is treated an impulsive acceleration, g = ..delta.. v delta(tau/sub s), ..delta..v being the jump velocity induced in the system by a shock at time tau/sub s/. We discuss the special cases N = 2 and N = 3, and illustrate both Rayleigh-Taylor and Ric… more
Date: December 16, 1983
Creator: Mikaelian, K.O.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Laser fusion experiments at LLL

Description: These notes present the experimental basis and status for laser fusion as developed at LLL. Two other chapters, one authored by K.A. Brueckner and the other by C. Max, present the theoretical implosion physics and laser plasma interaction physics. The notes consist of six sections. The first is an introductory section which provides some of the history of inertial fusion and a simple explanation of the concepts involved. The second section presents an extensive discussion of diagnostic instrume… more
Date: June 16, 1980
Creator: Ahlstrom, H.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Three wavelength optical alignment of the Nova laser

Description: The Nova laser, presently under construction at Lawrence Livermore National Laboratory, will be capable of delivering more than 100 kJ of focused energy to an Inertial Confinement Fusion (ICF) target. Operation at the fundamental wavelength of the laser (1.05 ..mu..m) and at the second and third harmonic will be possible. This paper will discuss the optical alignment systems and techniques being implemented to align the laser output to the target at these wavelengths prior to each target irradi… more
Date: November 16, 1983
Creator: Swift, C. D.; Bliss, E. S.; Jones, W. A. & Seppala, L. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Direct-Drive Inertial Fusion Research at the University of Rochester's Laboratory for Laser Energetics: A Review

Description: This paper reviews the status of direct-drive inertial confinement fusion (ICF) research at the University of Rochester's Laboratory for Laser Energetics (LLE). LLE's goal is to demonstrate direct-drive ignition on the National Ignition Facility (NIF) by 2014. Baseline "all-DT" NIF direct-drive ignition target designs have been developed that have a predicted gain of 45 (1-D) at a NIF drive energy of ~1.6 MJ. Significantly higher gains are calculated for targets that include a DT-wicked foam ab… more
Date: April 16, 2010
Creator: McCrory, R. L.; Meyerhofer, D. D.; Loucks, S. J.; Skupsky, S.; Bahr, R. E.; Betti, R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Laser-Matter Interactions with a 527 nm Drive

Description: The primary goal of this Exploratory Research is to develop an understanding of laser-matter interactions with 527-nm light (2{omega}) for studies of interest to numerous Laboratory programs including inertial confinement fusion (ICF), material strength, radiation transport, and hydrodynamics. In addition, during the course of this work we will develop the enabling technology and prototype instrumentation to diagnose a high fluence laser beam for energy, power, and near field intensity profile … more
Date: February 16, 2007
Creator: Glenzer, S; Niemann, C; Witman, P; Wegner, P; Mason, D; Haynam, C et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Characterization of High-Temperature Laser-Produced Plasmas Using Thomson Scattering

Description: Ultraviolet Thomson scattering has been fielded at the Omega Laser Facility to achieve accurate measurements of the plasma conditions in laser-produced high-temperature plasmas. Recent applications to hohlraum targets that have been filled with CH gas or SiO{sub 2} foams have demonstrated a new high temperature plasma regime of importance to laser-plasma interaction studies in a strongly damped regime such as those occurring in indirect drive inertial confinement fusion experiments. The Thomson… more
Date: September 16, 2005
Creator: Glenzer, S H; Froula, D H; Ross, S; Niemann, C; Meezan, N & Divol, L
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Estimated refractive index and solid density of DT, with application to hollow-microsphere laser targets

Description: The literature values for the 0.55-$mu$m refractive index N of liquid and gaseous H$sub 2$ and D$sub 2$ are combined to yield the equation (N - 1) = [(3.15 +- 0.12) x 10$sup -6$]rho, where rho is the density in moles per cubic meter. This equation can be extrapolated to 300$sup 0$K for use on DT in solid, liquid, and gas phases. The equation is based on a review of solid-hydrogen densities measured in bulk and also by diffraction methods. By extrapolation, the estimated densities and 0.55-$mu$m… more
Date: September 16, 1975
Creator: Briggs, C. K.; Tsugawa, R. T.; Hendricks, C. D. & Souers, P. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of Compton Radiography Diagnostics for Inertial Confinement Fusion Implosions

Description: An important diagnostic tool for inertial confinement fusion will be time-resolved radiographic imaging of the dense cold fuel surrounding the hot spot. The measurement technique is based on point-projection radiography at photon energies from 60-200 keV where the Compton effect is the dominant contributor to the opacity of the fuel or pusher. We have successfully applied this novel Compton Radiography technique to the study of the final compression of directly driven plastic capsules at the OM… more
Date: November 16, 2010
Creator: Tommasini, R.; Hatchett, S. P.; Hey, D. S.; Izumi, N.; Koch, J. A.; Landen, O. L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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