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P: Fachverband Plasmaphysik
P 21: Codes and Modeling II
P 21.3: Vortrag
Freitag, 20. März 2026, 10:00–10:15, KH 01.013
Event-driven simulation of X-ray Thomson scattering for warm dense matter probing — •Uwe Hernandez Acosta1,2, Thomas Gawne1,2, Jan Vorberger1, Hannah Bellenbaum1,2, and Tobias Dornheim1 — 1Helmholtz-Zentrum Dresden-Rossendorf, Germany — 2Center for Advanced Systems Understanding, Görlitz, Germany
X-ray Thomson scattering (XRTS) is a central diagnostic for investigating matter under extreme conditions, including laser-driven pump-probe experiments at X-ray free-electron lasers that probe high-energy-density states such as warm dense matter and the compression path of inertial confinement fusion capsules. The analysis of XRTS spectra is often challenging due to low photon counts, evolving sample conditions, and strong geometric and instrumental effects, which are only partially captured by conventional forward-modeling approaches based on convolutions of the dynamic structure factor with simplified source and instrument functions.
We present a proof-of-principle event-driven approach to XRTS modeling that directly connects microscopic electronic-structure physics with realistic detector simulations. Individual scattering events are sampled from the XRTS differential cross section and propagated through a detector model, naturally incorporating instrument response, geometry, and counting statistics. Focusing on non-resonant XRTS in a synthetic diagnostic setup, we demonstrate the technical feasibility and physical consistency of the method and benchmark it against conventional forward models.
Keywords: X-ray Thomson Scattering; Monte-Carlo Event Generation; Warm Dense Matter; XFEL Diagnostics; Dynamic Structure Factor