Static linear density response from X-ray Thomson scattering measurements: a case study of warm dense beryllium
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| Auteurs principaux: | , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912343810637824 |
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| author | Schwalbe, Sebastian Bellenbaum, Hannah Döppner, Tilo Böhme, Maximilian Gawne, Thomas Kraus, Dominik MacDonald, Michael J. Moldabekov, Zhandos Tolias, Panagiotis Vorberger, Jan Dornheim, Tobias |
| author_facet | Schwalbe, Sebastian Bellenbaum, Hannah Döppner, Tilo Böhme, Maximilian Gawne, Thomas Kraus, Dominik MacDonald, Michael J. Moldabekov, Zhandos Tolias, Panagiotis Vorberger, Jan Dornheim, Tobias |
| contents | Linear response theory is ubiquitous throughout physics and plays a central role in the theoretical description of warm dense matter -- an extreme state that occurs within compact astrophysical objects and that is traversed on the compression path of a fuel capsule in inertial confinement fusion applications. Here we show how one can relate the static linear density response function to X-ray Thomson scattering (XRTS) measurements, which opens up new possibilities for the diagnostics of extreme states of matter, and for the rigorous assessment and verification of theoretical models and approximations. As a practical example, we consider an XRTS data set of warm dense beryllium taken at the National Ignition Facility [T.~Döppner \emph{et al.}, \textit{Nature} \textbf{618}, 270-275 (2023)]. The comparison with state-of-the-art \emph{ab initio} path integral Monte Carlo (PIMC) simulations [T.~Dornheim \emph{et al.}, \textit{Nature Commun.}~(in print), arXiv:2402.19113] gives us a best estimate of the mass density of $ρ=18\pm6\,$g/cc, which is consistent with previous PIMC and density functional theory based studies, but rules out the original estimate of $ρ=34\pm4\,$g/cc based on a Chihara model fit. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_13611 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Static linear density response from X-ray Thomson scattering measurements: a case study of warm dense beryllium Schwalbe, Sebastian Bellenbaum, Hannah Döppner, Tilo Böhme, Maximilian Gawne, Thomas Kraus, Dominik MacDonald, Michael J. Moldabekov, Zhandos Tolias, Panagiotis Vorberger, Jan Dornheim, Tobias Plasma Physics Chemical Physics Linear response theory is ubiquitous throughout physics and plays a central role in the theoretical description of warm dense matter -- an extreme state that occurs within compact astrophysical objects and that is traversed on the compression path of a fuel capsule in inertial confinement fusion applications. Here we show how one can relate the static linear density response function to X-ray Thomson scattering (XRTS) measurements, which opens up new possibilities for the diagnostics of extreme states of matter, and for the rigorous assessment and verification of theoretical models and approximations. As a practical example, we consider an XRTS data set of warm dense beryllium taken at the National Ignition Facility [T.~Döppner \emph{et al.}, \textit{Nature} \textbf{618}, 270-275 (2023)]. The comparison with state-of-the-art \emph{ab initio} path integral Monte Carlo (PIMC) simulations [T.~Dornheim \emph{et al.}, \textit{Nature Commun.}~(in print), arXiv:2402.19113] gives us a best estimate of the mass density of $ρ=18\pm6\,$g/cc, which is consistent with previous PIMC and density functional theory based studies, but rules out the original estimate of $ρ=34\pm4\,$g/cc based on a Chihara model fit. |
| title | Static linear density response from X-ray Thomson scattering measurements: a case study of warm dense beryllium |
| topic | Plasma Physics Chemical Physics |
| url | https://arxiv.org/abs/2504.13611 |