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  • 1
    Monograph available for loan
    Monograph available for loan
    Five-day mean 500 hPa height and mean sea level pressure fields for the Northern Hemisphere (1946-1977) (1983)
    Geneva : WMO
    Associated volumes
    Details Availability
    Call number: MOP Per 849(2)
    In: Long-range forecasting research publication series
    Type of Medium: Monograph available for loan
    Series Statement: Long-range forecasting research publication series 2
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Methods of measuring vorticity in turbulent flows (1986)
    Springer
    Experiments in fluids 4 (1986), S. 61-71 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Experimental methods which have been developed over the last three decades to measure one or more components of the vorticity vector are described and assessed. These include methods which estimate the velocity gradients comprising the various vorticity components, methods which sense fluid rotation directly, and methods which sense other fluid properties which can be related to vorticity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00266561
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  • 3
    Electronic Resource
    Electronic Resource
    AIR-FLUIDIZED TOASTING OF WHOLE KERNEL WHEAT-PROCESSING VARIABLES AND FUNCTIONAL PROPERTIES FOR FOOD APPLICATIONS (1974)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 39 (1974), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Processing variables affecting toasted wheat properties were studied. For maximum gelatinization of starch, substantial moisture, up to 60% of the weight of the dry wheat, must be infused into the whole kernel and equilibrated prior to the heat treatment. Moistening, tempering and toasting optima were established. Cold paste viscosities can be reduced by over-toasting, as well as under-toasting. Heating rates must maximize starch gelatinization before moisture is evaporated. Enzyme inactivation, which affects storage stability as well as viscosity values, was not complete in 20 set at 300°F (mass-avg kernel temp 275°F) but was complete in only 15 set at 400°F (tMA= 323°F). Toasting expands the kernel twofold or more and creates a porous endosperm structure which absorbs water readily. Several applications were tested, such as soup and sauce thickeners, breaders and cereals for domestic and foreign feeding programs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1974.tb02865.x
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  • 4
    Electronic Resource
    Electronic Resource
    Shock structuring due to fabrication joints in targets (1999)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 6 (1999), S. 3327-3336 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The use of copper-doped beryllium ablators on National Ignition Facility [J. A. Paisner et al., Laser Focus World 30, 75 (1994)] targets, in place of plastic, can require the bonding together of hemispheres with a joint of differing composition. Indirect drive experiments have been conducted on the Nova laser [J. L. Emmet, W. F. Krupke, and J. B. Trenholme, Sov. J. Quantum Electron. 13, 1 (1983)], and the resulting shock structuring compared with code simulations. It is concluded that one of the available codes, the RAGE code [R. M. Baltrusaitis et al., Phys. Fluids 8, 2471 (1996)] provides useful insight into the effect of joints. This code is then employed to obtain a physical picture of the shock front nonuniformity in terms of a secondary rarefaction and an oblique shock interacting with the main shock that propagates in the absence of the joint. A simple analysis reinforces this picture.© 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.873572
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  • 5
    Electronic Resource
    Electronic Resource
    Moderate-convergence inertial confinement fusion implosions in tetrahedral hohlraums at Omega (2000)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 7 (2000), S. 2594-2603 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A highly uniform thermal x-radiation field for indirect-drive inertial confinement fusion implosions may be obtained by irradiating a four-hole, tetrahedral geometry, spherical hohlraum with all 60 Omega laser beams. Implosion studies and calculations [J. M. Wallace et al., Phys. Rev. Lett. 82, 3807 (1999)] indicate a drive uniformity comparable to that expected for the National Ignition Facility [J. A. Painser et al., Laser Focus World 30, 75 (1994)]. With 60 beams distributed over the cavity wall, tetrahedral hohlraums have a natural insensitivity to power balance and pointing errors. Standard, smooth Nova capsules imploded with this drive indicate that moderate convergence-ratio implosions, Cr∼18, have measured-neutron yield to calculated-clean-one-dimensional-neutronyield ratios similar to those previously investigated using the comparatively poor drive uniformity of Nova cylindrical hohlraums. This may indicate that a nonsymmetry-related neutron yield degradation mechanism, e.g., hydrodynamic mixing of cold, dense ablator material with the hot-spot region or some combination of nonsymmetry effects, is dominating in this Cr regime. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.874101
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  • 6
    Electronic Resource
    Electronic Resource
    The Measurement of Vorticity in Turbulent Flows (1995)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 27 (1995), S. 469-514 
    Details
    ISSN: 0066-4189
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.fl.27.010195.002345
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  • 7
    Electronic Resource
    Electronic Resource
    Indirect drive experiments utilizing multiple beam cones in cylindrical hohlraums on OMEGA : The 39th annual meeting of division of plasma physics of APS (1998)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 5 (1998), S. 1960-1965 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Current plans for time-dependent control of flux asymmetry in the National Ignition Facility [J. A. Paisner, J. D. Boyes, S. A. Kumpan, and M. Sorem, "The National Ignition Facility Project," ICF Quart. 5, 110 (1995)] hohlraums rely on multiple beam cones with different laser power temporal profiles in each cone. Experiments with multiple beam cones have begun on the Omega laser facility [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] at the University of Rochester. In addition to allowing symmetry experiments similar to those performed on Nova [A. Hauer et al., Rev. Sci. Instrum. 66, 672 (1995)], the Omega facility allows multiple beam cones to be moved independently to confirm our ability to model the resulting implosion image shapes. Results indicate that hohlraum symmetry behaves similarly with multiple rings of beams as with a single ring, but with the weighted beam spot position used to parametrize the beam pointing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872866
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  • 8
    Electronic Resource
    Electronic Resource
    An analytical and numerical investigation of ion acoustic waves in a two-ion plasma (1994)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 1 (1994), S. 3542-3556 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The ion acoustic dispersion relation for a plasma containing two distinct ion species is investigated over a wide range of plasma conditions. An approximate general analytic solution to the dispersion relation has been found, and is shown, by comparison to accurate numerical solutions of the individual modes, to be remarkably precise. This solution provides for the first time a systematic account of the totality of ion acoustic modes of the two-ion system. It has been found that ion acoustic modes consist of two types of modes: (a) at least one, and, at most, two weakly damped modes for which ||ωI/ωR||(very-much-less-than)1, and (b) an infinity of critically damped modes for which ωI/ωR(approximately-equal-to)−1. The critically damped modes are organized into two distinct categories: (a) modes for which ||ω||/k(approximately-greater-than)vF (vF is the thermal speed of the fast ion species); and (b) modes for which vS〈||ω||/k〈vF (vS is the thermal speed of the slow ion species). The critically damped modes with ||ω||/k(approximately-greater-than)vF are further organized into three distinct classes: (1) modes with phase speeds characterized by vF, (2) modes with phase speeds characterized by vFvS/(square root of)v2F−v2S, and (3) modes with phase speeds characterized by vS. The critically damped modes with vS〈||ω||/k〈vF belong to a single class, and are characterized by vS. Generally, it is found that there are one, or, at most, two modes with relatively small damping, while most of the remaining modes are too strongly damped to be physically realized. It has also been found possible to maximize the ion acoustic damping in a two-ion plasma by a judicious choice of the relative ion concentrations. More specifically, an admixture of the lighter ion species will maximize the damping coefficient over a wide range of plasma conditions. This is important for certain gas-filled, inertial-fusion targets of current interest, where it is desirable to minimize the stimulated Brillouin backscatter process by maximizing the damping.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.870889
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  • 9
    Electronic Resource
    Electronic Resource
    Convective gain of stimulated Brillouin scattering in long-scale length, two-ion-component plasmas (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 3 (1996), S. 1073-1090 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The linear kinetic theory is developed for the convective amplification of stimulated Brillouin scattering in a plasma containing two distinct ion species. A computationally tractable expression for the gain coefficient Q is obtained by, first, restricting consideration to growth from the two possible weakly damped ion modes in the two-ion-species plasma and, second, invoking the two-mode approximation for ε−1, the ion response function, in the plasma. Furthermore, a practical procedure is presented for efficiently obtaining Q over the mesh of a large-scale hydrodynamic simulation of a laser-irradiated target. The theory and its application are demonstrated in the simulation of a simple gas target. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871763
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  • 10
    Electronic Resource
    Electronic Resource
    Convective threshold of stimulated Brillouin scattering in a two-ion plasma (1995)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 2 (1995), S. 1682-1695 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The convective threshold of stimulated Brillouin backscatter (SBS) in a laser-irradiated plasma containing two distinct ion species is investigated over a wide range of plasma conditions and laser intensities. This investigation, carried out in the context of kinetic theory, is a generalization of a previous investigation of ion acoustic waves in a two-ion plasma, i.e., the unpumped system. The totality of SBS modes in the two-ion system is obtained using a numerical sweep through the complex-ω plane. The coupling of the electromagnetic pump wave to the plasma produces only one mode, in addition to the ion acoustic modes. Because this additional mode is not a normal mode of the plasma in the absence of the pump wave, it is called a quasimode. The SBS modes fall into three classes: (a) at least one and, at most, two modes that are weakly damped for sufficiently low laser intensity, reducing to the weakly damped ion acoustic modes as the pump strength vanishes; (b) an infinity of critically damped modes, most of which are relatively insensitive to the laser intensity; and (c) a single mode (quasimode), which may exhibit either growth or damping as laser intensity increases. The threshold laser intensity for convective SBS growth, the smallest intensity, where one of the modes ceases to be damped, ωI=0, may be associated with modes of classes (a), (b), or (c). The present study shows that the growing mode is not necessarily associated with the SBS modes obtained from fluid theory. A practical numerical procedure is presented for quickly determining the threshold intensity for SBS in a two-ion system for a given set of plasma parameters. The method is quite efficient and may be readily incorporated into large-scale hydrodynamic simulation codes to provide an assessment of SBS growth over the numerical mesh of the computation. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871317
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