NDLI: X-ray Thomson scattering in dense plasmas

Content Provider	IEEE Xplore Digital Library
Author	Holl, A. Redmer, R. Ropke, G. Reinholz, H.
Copyright Year	2004
Description	Author affiliation: Dept of Phys., Rostock Univ., Germany (Holl, A.; Redmer, R.; Ropke, G.; Reinholz, H.)
Abstract	Summary form only given. The scattering of photons in plasmas is an important diagnostic tool. Dense plasmas as relevant for inertial confinement fusion experiments or planetary interiors can be probed by X-ray Thomson scattering. The scattering cross section is related to the dynamic structure factor which contains contributions from free electrons, electrons tight to the ion motion including screening, and of inelastic scattering off core electrons. Especially, we treat the scattering on free electrons in the plasma beyond the standard RPA by including collisions. The respective dielectric function is determined in the Born-Mermin approximation. We find that collisions modify the dynamic structure factor significantly in the warm dense matter region, i.e. for solid-density plasmas at temperatures of some eV. This is important for plasma diagnostics, i.e. when using the Thomson scattering signal for the determination of plasma densities and temperatures. For instance, we could show that the extracted plasma temperatures differ by a factor of about two when using the standard RPA and the present Born-Mermin approach. Improvements of the Born approximation for the treatment of collisions can be discussed within the Gould-DeWitt scheme.
Sponsorship	Plasma Sci. and Applications Committee of the IEEE Nuclear and Plasma Sci. Soc
File Size	66123
File Format	PDF
ISBN	0780383346
ISSN	07309244
DOI	10.1109/PLASMA.2004.1339896
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-07-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	X-ray scattering Plasma density Plasma x-ray sources Electromagnetic scattering Particle scattering Plasma diagnostics Plasma temperature Electrons Plasma confinement Plasma displays
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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