Journal
PHYSICS OF PLASMAS
Volume 16, Issue 5, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.3100203
Keywords
plasma instability; plasma ion acoustic waves; plasma production by laser; plasma sources; plasmons
Categories
Funding
- EPSRC [EP/G007187/1, EP/D062837/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G007187/1, EP/D062837/1] Funding Source: researchfish
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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.
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