Exploring variations in dynamic collision frequencies

ORAL

Abstract

In a steady (zero-frequency) electric field, electron-ion collision frequencies inform the conductivity of materials and line shapes in the warm and hot dense matter regimes. Oscillating fields introduce dynamic effects that modify the collision frequencies, affecting absorption and scattering signatures of plasmas. Here, we explore how changes to scattering cross sections, densities of states, ion structure factors, integration methods, and inelastic processes modify the dynamic collision frequencies and associated observables such as the damping of plasmons in X-ray Thomson Scattering spectra.

*This work was supported by SNL's LDRD program, project number 218456. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525.

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Publication: We plan a submission to PRE on the use of these collision frequencies to inform dynamic structure factors and stopping powers, and to reference these results in a revision of a submission on X-ray Thomson Scattering to PRL.

Presenters

  • Stephanie B Hansen

    • Sandia National Laboratories

Authors

  • Stephanie B Hansen

    • Sandia National Laboratories

  • Thomas Hentschel

    • Cornell University

  • Alina Kononov

    • Sandia National Labs
    • Sandia National Lab

  • Andrew D Baczewski

    • Sandia National Laboratories