Simulations and diagnostics of high-energy-density plasmas and warm dense matter rely on models of material response properties, both static and dynamic (frequency-dependent). Here, we systematically investigate variations in dynamic electron–ion collision frequencies in warm dense matter using data from a self-consistent-field average-atom model. We show that including the full quantum density of states, strong collisions, and inelastic collisions lead to significant changes in . These changes result in red shifts and broadening of the plasmon peak in the dynamic structure factor, an effect observable in x-ray Thomson scattering spectra, and modify stopping powers around the Bragg peak. These changes improve the agreement of computationally efficient average-atom models with first-principles time-dependent density functional theory in warm dense aluminum, carbon, and deuterium.
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Improving dynamic collision frequencies: Impacts on dynamic structure factors and stopping powers in warm dense matter
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June 2023
Research Article|
June 02 2023
Improving dynamic collision frequencies: Impacts on dynamic structure factors and stopping powers in warm dense matter
Thomas W. Hentschel
;
Thomas W. Hentschel
a)
(Conceptualization, Data curation, Formal analysis, Software, Writing – original draft, Writing – review & editing)
1
School of Applied and Engineering Physics, Cornell University
, Ithaca, New York 14850, USA
a)Author to whom correspondence should be addressed: th584@cornell.edu
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Alina Kononov
;
Alina Kononov
(Conceptualization, Formal analysis, Writing – original draft, Writing – review & editing)
2
Center for Computing Research, Sandia National Laboratories
, Albuquerque, New Mexico 87123, USA
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Alexandra Olmstead;
Alexandra Olmstead
(Formal analysis, Writing – review & editing)
2
Center for Computing Research, Sandia National Laboratories
, Albuquerque, New Mexico 87123, USA
3
Nanoscience and Microsystems Engineering Program, University of New Mexico
, Albuquerque, New Mexico 87131, USA
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Attila Cangi
;
Attila Cangi
(Formal analysis, Writing – review & editing)
4
Center for Advanced Systems Understanding
, Helmholtz-Zentrum Dresden-Rossendorf, Görlitz 02826, Germany
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Andrew D. Baczewski
;
Andrew D. Baczewski
(Conceptualization, Formal analysis, Writing – original draft, Writing – review & editing)
2
Center for Computing Research, Sandia National Laboratories
, Albuquerque, New Mexico 87123, USA
5
Center for Quantum Information and Control (CQuIC), Department of Physics and Astronomy, University of New Mexico
, Albuquerque, New Mexico 87131, USA
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Stephanie B. Hansen
Stephanie B. Hansen
(Conceptualization, Formal analysis, Writing – original draft, Writing – review & editing)
6
Pulsed Power Sciences Center, Sandia National Laboratories
, Albuquerque, New Mexico 87123, USA
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a)Author to whom correspondence should be addressed: th584@cornell.edu
Phys. Plasmas 30, 062703 (2023)
Article history
Received:
January 25 2023
Accepted:
May 15 2023
Citation
Thomas W. Hentschel, Alina Kononov, Alexandra Olmstead, Attila Cangi, Andrew D. Baczewski, Stephanie B. Hansen; Improving dynamic collision frequencies: Impacts on dynamic structure factors and stopping powers in warm dense matter. Phys. Plasmas 1 June 2023; 30 (6): 062703. https://doi.org/10.1063/5.0143738
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