Statistical inference of collision frequencies from x-ray Thomson scattering spectra

Hentschel, Thomas W.; Kononov, Alina; Baczewski, Andrew D.; Hansen, Stephanie B.

doi:10.1063/5.0235628

Title: Statistical inference of collision frequencies from x-ray Thomson scattering spectra

Journal Article · 28 January 2025 · Physics of Plasmas

DOI: https://doi.org/10.1063/5.0235628 · OSTI ID:2507359

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Cornell University, Ithaca, NY (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Thomson scattering spectra measure the response of plasma particles to incident radiation. In warm dense matter, which is opaque to visible light, x-ray Thomson scattering (XRTS) enables a detailed probe of the electron distribution and has been used as a diagnostic for electron temperature, density, and plasma ionization. In this work, we examine the sensitivities of inelastic XRTS signatures to modeling details, including the dynamic collision frequency and the electronic density of states. Applying verified Monte Carlo inversion methods to dynamic structure factors obtained from time-dependent density functional theory, we assess the utility of XRTS signals as a way to inform the dynamic collision frequency, especially its direct-current limit, which is directly related to the electrical conductivity.

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Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: NA0003525

OSTI ID:: 2507359

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 1 Vol. 32; ISSN 1070-664X; ISSN 1089-7674

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Statistical inference of collision frequencies from x-ray Thomson scattering spectra

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