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Title: Modelling Thomson Scattering in a Hydrogen Plasma at Stellar Interior Conditions Using the Hypernetted‐Chain Approach

Journal Article · · Contributions to Plasma Physics
DOI: https://doi.org/10.1002/ctpp.70002 · OSTI ID:2545114
 [1];  [1];  [2];  [3];  [4];  [4]; ORCiD logo [5];  [6];  [1]
  1. University of Rostock (Germany)
  2. University of Warwick, Coventry (United Kingdom)
  3. École Polytechnique—Institut Polytechnique de Paris (France)
  4. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  5. University of Rochester, NY (United States)
  6. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
+ Show Author Affiliations

Under the extreme conditions found in small stars, where electron degeneracy and Coulomb coupling are significant, accurate modeling of Thomson scattering is crucial for determining opacity, a primary quantity for stellar energy transport. We use hypernetted-chain calculations, incorporating quantum pseudopotentials and electron-exchange effects to obtain the electron–electron static structure factor to calculate the Thomson scattering transport cross-section for conditions prevailing in the interior of small stars. These results are compared to those from average-atom simulations and analytical calculations. Our findings support laboratory astrophysics experiments aimed at benchmarking opacity models for stellar interiors, particularly for red dwarf stars, and help to bridge theoretical models with observations.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); University of Rochester, NY (United States)
Sponsoring Organization:
Deutsche Forschungsgemeinschaft (DFG); USDOE; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344; NA0004144
OSTI ID:
2545114
Report Number(s):
LLNL--JRNL-2004657; 2025-059, 2059, 3060
Journal Information:
Contributions to Plasma Physics, Journal Name: Contributions to Plasma Physics Journal Issue: 8-9 Vol. 65; ISSN 0863-1042; ISSN 1521-3986
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

ICF
Thomson scattering
dense plasma
hydrogen
radiation transport
static structure factor