A proof-of-principle event-driven Monte-Carlo framework samples XRTS events from differential cross sections and passes them through detector simulations to preserve kinematic information and support model-agnostic analysis.
A Momentum-Resolved X-ray Thomson Scattering Benchmark of Electronic-Response Models in Warm Dense Aluminium
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abstract
The robust diagnosis of conditions generated in warm dense matter (WDM) experiments remains a persistent challenge. Here we describe the measurement of shock-compressed aluminium at 50 GPa with angle-resolved femtosecond x-ray Thomson scattering (XRTS) over a wide range of scattering wavevectors at the European XFEL. The measured plasmon dispersion and line shape show that the de facto standard approach for analysing XRTS spectra, based on uniform-electron-gas models, systematically overestimates the resonance energy by up to 8 eV. We present an ab initio approach that agrees within the experimental uncertainty and demonstrates that accounting for shock-induced disorder is critical for interpreting shock-compressed systems, providing evidence that ab initio treatments are required for reliable XRTS inference in warm dense aluminium.
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xDAVE is a new code implementing the Chihara decomposition for rapid DSF calculation and XRTS spectrum analysis, validated on OMEGA beryllium data and coupled to ray-tracing for predictions while highlighting energy-dependent instrument functions.
The paper reviews the use of the imaginary-time correlation function to extract temperature, normalization, and Rayleigh weight from XRTS spectra without model dependence.
XRTS has become a leading diagnostic for extreme states of matter, and this review compiles prior experiments, analysis methods, and future directions.
Quantum effects govern behavior in warm dense matter and inertial fusion plasmas and are best modeled by combining quantum methods through downfolding from first-principles simulations.
citing papers explorer
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Monte-Carlo Event Generation for X-Ray Thomson Scattering Analysis
A proof-of-principle event-driven Monte-Carlo framework samples XRTS events from differential cross sections and passes them through detector simulations to preserve kinematic information and support model-agnostic analysis.
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X-Ray Diagnostics Analysis Verification and Exploration (xDAVE) Code for the Prediction and Interpretation of X-Ray Thomson Scattering Experiments
xDAVE is a new code implementing the Chihara decomposition for rapid DSF calculation and XRTS spectrum analysis, validated on OMEGA beryllium data and coupled to ray-tracing for predictions while highlighting energy-dependent instrument functions.
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Model-free interpretation of X-ray Thomson scattering measurements
The paper reviews the use of the imaginary-time correlation function to extract temperature, normalization, and Rayleigh weight from XRTS spectra without model dependence.
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Overview of X-ray Thomson scattering measurements of extreme states of matter
XRTS has become a leading diagnostic for extreme states of matter, and this review compiles prior experiments, analysis methods, and future directions.
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Quantum effects in plasmas
Quantum effects govern behavior in warm dense matter and inertial fusion plasmas and are best modeled by combining quantum methods through downfolding from first-principles simulations.