Oxford Centre for High Energy Density Science (OxCHEDS)

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Vulcan Petawatt interaction facility

Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 4948 (2003) 444-451

Authors:

Christopher B Edwards, JC Aldis, R Allott, PA Brummitt, J Collier, RJ Clark, CN Danson, R Day, M Dominey, BC Eltham, AJ Frackiewicz, JA Govans, BJ Gray, S Hancock, PE Hatton, S Hawkes, CR Heathcote, C Hernandez-Gomez, P Holligan, C Hooker, MH Hutchinson, AR Jackson, A Kidd, T Knott, WJ Lester, JM Loose, AJ MacPhee, J Monk, ZA Miljus, D Neely, DR Neville, P Norreys, M Notley, J O'Dell, DA Pepler, MR Pitts, CJ Reason, D Robinson, KJ Rodgers, DA Rodkiss, D Rose, SJ Rose, IN Ross, AJ Ryder, MR Selley, T Strange, GP Warner, R Wellstood, GN Wiggins, TB Winstone, PN Wright, RW Wyatt, BE Wyborn, Ch Ziener
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Fast Ignition Research at the Institute of Laser Engineering, Osaka University

AIP Conference Proceedings AIP Publishing 669:1 (2003) 257-260

Authors:

KA Tanaka, R Kodama, Y Kitagawa, H Fujita, T Jitsuno, K Mima, N Miyanaga, T Norimatsu, Y Sentoku, K Shigemori, A Sunahara, T Miyakoshi, F Otani, T Sato, M Tanpo, Y Tohyama, T Yamanaka, K Krushelnick, PA Norreys, M Zepf
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Strong coupling corrections in the analysis of x-ray Thomson scattering measurements

J PHYS A-MATH GEN 36:22 (2003) 5971-5980

Authors:

G Gregori, SH Glenzer, OL Landen

Abstract:

We present simplified expressions for the dynamic structure factor, or form factor S(k, omega), which is the quantity describing the inelastic x-ray scattering cross section from a dense plasma or a simple liquid. Our results, based on the random phase approximation (RPA) for the treatment on the charged particle coupling, are compared with analytical expressions for the free electron dynamic structure factor which include effects of strong coupling in both classical and degenerate plasmas. We will show that these modifications introduce minimal corrections to the RPA for typical conditions found in recent non-collective x-ray Thomson scattering experiment on solid density isochorically heated laser plasmas. On the other hand, strong collective scattering may exhibit significant deviations from the RPA. The results shown in this work can be applied to interpreting future x-ray scattering in warm dense plasmas occurring in inertial confinement fusion experiments or for the modelling of solid density matter found in the interior of planets.
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X-ray scattering from solid density plasmas

Physics of Plasmas 10:6 (2003) 2433-2441

Authors:

SH Glenzer, G Gregori, FJ Rogers, DH Froula, SW Pollaine, RS Wallace, OL Landen

Abstract:

A study on the x-ray scattering from solid density plasmas was presented. By applying spectrally resolved multi-keV scattering, the measurements of the microscopic properties of dense matter were demonstrated. The scattering spectra from solid density beryllium demonstrated the inelastic Compton-down shifted feature that is spectrally broadened when heating the solid density plasmas isochorically and homogeneously to temperatures of several times the Fermi energy.
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Demonstration of spectrally resolved x-ray scattering in dense plasmas.

Phys Rev Lett 90:17 (2003) 175002

Authors:

SH Glenzer, G Gregori, RW Lee, FJ Rogers, SW Pollaine, OL Landen

Abstract:

We present the first spectrally resolved x-ray scattering measurements from solid-density plasmas. The scattering spectra show the broadened Compton down-shifted feature allowing us to determine the electron temperature and density with high accuracy. In the low temperature limit, our data indicate that the ionization balance reflects the electrons in the conduction band consistent with calculations that include quantum mechanical corrections to the interaction potential.
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