Oxford Centre for High Energy Density Science (OxCHEDS)

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Dynamical friction in a relativistic plasma.

Physical review. E, Statistical, nonlinear, and soft matter physics 89:5 (2014) 053107

Authors:

OJ Pike, SJ Rose

Abstract:

The work of Spitzer on dynamical friction in a plasma [L. Spitzer, Jr., Physics of Fully Ionized Gases, 2nd ed. (Wiley, New York, 1962), Chap. 5] is extended to relativistic systems. We derive the force of dynamical friction, diffusion tensor, and test particle relaxation rates for a Maxwellian background in the same form as Trubnikov [B. A. Trubnikov, in Reviews of Plasma Physics, edited by M. A. Leontovich (Consultants Bureau, New York, 1965), Vol. 1, p. 105], enabling high-temperature laboratory and astrophysical plasmas to be modeled in a consistent manner.
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INTENSITY ENHANCEMENT OF O vi ULTRAVIOLET EMISSION LINES IN SOLAR SPECTRA DUE TO OPACITY

The Astrophysical Journal Letters American Astronomical Society 784:2 (2014) l39

Authors:

FP Keenan, JG Doyle, MS Madjarska, SJ Rose, LA Bowler, J Britton, L McCrink, M Mathioudakis
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Shock waves in polycrystalline iron: Plasticity and phase transitions

Physical Review B American Physical Society (APS) 89:14 (2014) 140102

Authors:

Nina Gunkelmann, Eduardo M Bringa, Diego R Tramontina, Carlos J Ruestes, Matthew J Suggit, Andrew Higginbotham, Justin S Wark, Herbert M Urbassek
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Special issue on compact x-ray sources

Journal of Physics B Atomic Molecular and Optical Physics IOP Publishing 47:7 (2014) 070401

Authors:

Simon Hooker, Katsumi Midorikawa, James Rosenzweig
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Electron-ion equilibration in ultrafast heated graphite.

Physical review letters 112:14 (2014) 145005

Authors:

TG White, NJ Hartley, B Borm, BJB Crowley, JWO Harris, DC Hochhaus, T Kaempfer, K Li, P Neumayer, LK Pattison, F Pfeifer, S Richardson, APL Robinson, I Uschmann, G Gregori

Abstract:

We have employed fast electrons produced by intense laser illumination to isochorically heat thermal electrons in solid density carbon to temperatures of ∼10,000  K. Using time-resolved x-ray diffraction, the temperature evolution of the lattice ions is obtained through the Debye-Waller effect, and this directly relates to the electron-ion equilibration rate. This is shown to be considerably lower than predicted from ideal plasma models. We attribute this to strong ion coupling screening the electron-ion interaction.
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