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Low frequency structural dynamics of warm dense matter
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Gregori, Gianluca and Gericke, Dirk O. (2009) Low frequency structural dynamics of warm dense matter. Physics of Plasmas, Vol.16 (No.5). p. 6306. doi:10.1063/1.3100203 ISSN 1070-664X.
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Official URL: http://dx.doi.org/10.1063/1.3100203
Abstract
Measurements of the microscopic response of warm dense matter have been demonstrated by multi-keV inelastic x-ray scattering using laser-based sources. These techniques have been used to study the high frequency electron correlations (plasmons) in low to mid-Z plasmas. The advent of fourth generation light sources will provide high fluxes of narrowband and coherent x rays that will allow to look at the low frequency correlations (the ion-acoustic waves). In this paper we present an analysis of such low frequency modes by calculating the frequency dependent ion-ion structure factor. Our model includes all the relevant multibody contributions arising from strong coupling and nonideal plasma effects. In particular, the ion-ion structure factor is obtained within the memory function formalism by satisfying a finite number of sum rules. This work could be used as a basis to a direct experimental test of dense plasma model as soon as keV free electron laser sources will become available.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Plasma stability, Plasma waves, Ion acoustic waves, Plasma (Ionized gases) -- Research, Plasmons (Physics) | ||||
| Journal or Publication Title: | Physics of Plasmas | ||||
| Publisher: | American Institute of Physics | ||||
| ISSN: | 1070-664X | ||||
| Official Date: | 3 April 2009 | ||||
| Dates: |
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| Volume: | Vol.16 | ||||
| Number: | No.5 | ||||
| Page Range: | p. 6306 | ||||
| DOI: | 10.1063/1.3100203 | ||||
| Status: | Peer Reviewed | ||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC), Science and Technology Facilities Council (Great Britain) (STFC) | ||||
| Grant number: | EP/G007187/1 (EPSRC) |
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