WorldCat Identities

Turner, Roy E. (Roy Edgar) 1931-

Overview
Works: 55 works in 124 publications in 2 languages and 1,107 library holdings
Genres: Conference papers and proceedings 
Roles: Author, Editor, Other, Recipient
Publication Timeline
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Most widely held works by Roy E Turner
Introductory statistical mechanics by D. S Betts( Book )

18 editions published between 1974 and 1992 in English and Undetermined and held by 297 WorldCat member libraries worldwide

Relativity physics by Roy E Turner( Book )

10 editions published in 1984 in English and Undetermined and held by 284 WorldCat member libraries worldwide

Vacuum microelectronics 1989 proceedings of the second International Conference on Vacuum Microelectronics held in Bath, 24-26 July 1989 by International Conference on Vacuum Microelectronics( Book )

14 editions published in 1989 in English and held by 131 WorldCat member libraries worldwide

Wonted work : a guide to the informal economy by Graeme Shankland( Book )

3 editions published in 1988 in English and held by 83 WorldCat member libraries worldwide

NASA/MFSC FY-81 atmospheric processes research review : summary of a program review held in Huntsville, Alabama, September 1-3, 1981 by United States( Book )

3 editions published in 1981 in English and held by 79 WorldCat member libraries worldwide

Data for NASA's AVE IV experiment : 25 mb sounding data and synoptic charts by Nancy F Fucik( Book )

5 editions published in 1976 in English and held by 35 WorldCat member libraries worldwide

NASA/MFSC FY-82 atmospheric processes research review : summary of a program review held in Huntsville, Alabama, October 19-21, 1982( Book )

2 editions published in 1982 in English and held by 15 WorldCat member libraries worldwide

The many-body problem by W. E Parry( Book )

5 editions published in 1969 in English and Italian and held by 13 WorldCat member libraries worldwide

Wetlands, ecology and management by Brij Gopal( Book )

5 editions published in 1982 in English and held by 9 WorldCat member libraries worldwide

Papers presented at the First International Wetlands Conference, New Delhi, 1980
The life and death of Louis Riel : [a study in forensic psychiatry by E. R Markson( Book )

5 editions published in 1965 in English and held by 7 WorldCat member libraries worldwide

Acritarchs of Llandeilo and Caradoo age from classic localities in Britain by Roy E Turner( Book )

4 editions published between 1979 and 1980 in English and held by 5 WorldCat member libraries worldwide

Exhibitionism and pedophilia : results of a follow-up study of forensic out-patients by Johann W Mohr( Book )

1 edition published in 1962 in English and held by 4 WorldCat member libraries worldwide

FY'03 OMEGA Summary for LLE Annual Report( )

1 edition published in 2003 in English and held by 0 WorldCat member libraries worldwide

Lawrence Livermore National Laboratory (LLNL) continued, in FY03, to be a large user of Omega, using 390 experimental shots. These are roughly broken into 2 groups: those in support of the inertial confinement fusion (ICF) program; and those in support of high energy density sciences (HEDS), which includes materials, equation of state, and physics experiments
LLNL Experiments at OMEGA in FY05( )

1 edition published in 2005 in English and held by 0 WorldCat member libraries worldwide

During FY05, LLNL was scheduled for 372 shots on Omega. These were distributed into 191 planned shots for the Inertial Confinement Fusion (ICF) program, and 181 planned shots for the High Energy Density Sciences (HEDS) program. The actual Omega performance averaged 6% more shots than scheduled. A brief summary of the various campaigns follows, starting with HEDS experiments
Hard X-ray Imaging for Measuring Laser Absorption Spatial Profiles on the National Ignition Facility( )

1 edition published in 2006 in English and held by 0 WorldCat member libraries worldwide

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 optimizing this measurement, issues that have to be addressed are hard x-ray visibility during the entire ignition laser pulse with intensities ranging from 10{sup 13} to 10{sup 15} W/cm{sup 2}, as well as simultaneous visibility of the inner and the outer laser drive cones. In this work we will compare the hard x-ray emission calculated by LASNEX and analytical modeling with thin wall imaging data recorded previously on Omega and during the first hohlraum experiments on NIF. Based on these calculations and comparisons the thin wall imaging will be optimized for ICF/NIF experiments
LLNL Experimental Results on OMEGA : FY'04( )

1 edition published in 2004 in English and held by 0 WorldCat member libraries worldwide

Lawrence Livermore National Laboratory (LLNL) conducted approximately 360 shots on Omega in FY04. Approximately half of the shots were devoted to ICF-relevant experiments. These are summarized as follows
Laser Coupling to Reduced-Scale Targets at the Early Light Program of the National Ignition Facility( )

1 edition published in 2004 in English and held by 0 WorldCat member libraries worldwide

A platform for analysis of material properties under extreme conditions, where a sample is bathed in radiation with a high temperature, is under development. This hot environment is produced with a laser by depositing maximum energy into a small, high-Z can. Such targets were recently included in an experimental campaign using the first four of the 192 beams of the National Ignition Facility, under construction at the University of California Lawrence Livermore National Laboratory. These targets demonstrate good laser coupling, reaching a radiation temperature of 340 eV. In addition, there is a unique wavelength dependence of the Raman backscattered light that is consistent with Brillouin backscatter of Raman forward scatter [A.B. Langdon and D.E. Hinkel, Physical Review Letters 89, 015003 (2002)]. Finally, novel diagnostic capabilities indicate that 20% of the direct backscatter from these reduced-scale targets is in the polarization orthogonal to that of the incident light
Hydro-Coupling Effects on Compression Symmetry in Gas-Filled Hohlraum Experiments at the Omega Laser( )

1 edition published in 2003 in English and held by 0 WorldCat member libraries worldwide

Ignition hohlraum designs use low Z gas fill to slow down the inward progress of high Z ablated plasma from the hohlraum walls preventing large laser spot motion and capsule drive asymmetries. In order to optimize the ignition design, the gas hydro-coupling effect to a fusion capsule asymmetry is presently being assessed in experiments at the Omega laser facility with gas filled hohlraums and foam balls. Our experiments measure the effects of the pressure spike that is generated by direct gas heating by the drive laser beams on the capsule surrogate for various hohlraum gas fill densities (0-2.5 mg/cc). To isolate the effect of the gas-hydro coupling pressure, we have begun by using plastic ''hohlraums'' to reduce the x-ray ablation pressure. The foam ball images measured by x-ray backlighting show increasing pole-hot pressure asymmetry for increasing gas pressure. In addition, the gas hydrodynamics is studied by imaging of a low concentration Xe gas fill dopant. The gas fill self-emission. shows the early pressure spike and its propagation towards the foam ball, as well as the gas stagnation on the holraum axis at later times, both contributing to the capsule asymmetry. These first gas hydro-coupling results are compared to LASNEX simulations
Laser coupling to reduced-scale targets at NIF Early Light( )

1 edition published in 2005 in English and held by 0 WorldCat member libraries worldwide

Deposition of maximum laser energy into a small, high-Z enclosure in a short laser pulse creates a hot environment. Such targets were recently included in an experimental campaign using the first four of the 192 beams of the National Ignition Facility [J.A. Paisner, E.M. Campbell, and W.J. Hogan, Fusion Technology 26, 755 (1994)], under construction at the University of California Lawrence Livermore National Laboratory. These targets demonstrate good laser coupling, reaching a radiation temperature of 340 eV. In addition, the Raman backscatter spectrum contains features consistent with Brillouin backscatter of Raman forward scatter [A.B. Langdon and D.E. Hinkel, Physical Review Letters 89, 015003 (2002)]. Also, NIF Early Light diagnostics indicate that 20% of the direct backscatter from these reduced-scale targets is in the polarization orthogonal to that of the incident light
Using Laser Entrance Hole Shields to Increase Coupling Efficiency in Indirect Drive Ignition Targets for the National Ignition Facility (NIF)( )

1 edition published in 2005 in English and held by 0 WorldCat member libraries worldwide

Coupling efficiency, the ratio of the capsule absorbed energy to the driver energy, is a key parameter in ignition targets. The hohlraum originally proposed for NIF coupled {approx}11% of the absorbed laser energy to the capsule as x-rays. We describe here a second generation of hohlraum target which has higher coupling efficiency, {approx}16%. Because the ignition capsule's ability to withstand 3D effects increases rapidly with absorbed energy, the additional energy can significantly increase the likelihood of ignition. The new target includes laser entrance hole (LEH) shields as a principal method for increasing coupling efficiency while controlling symmetry in indirect-drive ICF. The LEH shields are high Z disks placed inside the hohlraum to block the capsule's view of the cold LEHs. The LEH shields can reduce the amount of laser energy required to drive a target to a given temperature via two mechanisms: (1) keeping the temperature high near the capsule pole by putting a barrier between the capsule and the pole, (2) because the capsule pole does not have a view of the cold LEHs, good symmetry requires a shorter hohlraum with less wall area. Current integrated simulations of this class of target couple 140 kJ of x-rays to a capsule out of 865 kJ of absorbed laser energy and produce {approx}10 MJ of yield. In the current designs, which are not completely optimized, the addition of the LEH shields saves {approx}95 kJ of energy (about 10%) over hohlraums without LEH shields
 
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Audience level: 0.64 (from 0.52 for Relativity ... to 0.84 for Acritarchs ...)

Alternative Names
Turner, R. E. 1931-

Turner, R.E. physicien

Turner, R. E. (Roy Edgar), 1931-

Turner, Roy E.

Turner, Roy Edgar

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