Observation on radiation transfer experiments using k-shell absorption spectra
Recent laser-produced plasma experiments have relied on spectroscopic comparisons with models to infer plasma temperatures. Here, the technique is applied to study thermal radiation transfer experiments. The transmission model combines high-quality atomic data with an ionization balance obtained from systematic expansions of the grand canonical ensemble. The latter avoids the ad hoc cutoffs required in free energy minimization schemes and includes Coulomb corrections usually neglected in other models. It is shown that the improved equation of state significantly affects inferred temperatures at the higher densities expected in the heat flow experiments. Even though good agreement is obtained between the experimental and theoretical transmission spectrum, the experimental uncertainties are sufficiently large that is compromises the intended bench marking of the thermal transport models.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 29316
- Report Number(s):
- UCRL-JC-119309; CONF-9410314-2; ON: DE95008068; TRN: 95:008429
- Resource Relation:
- Conference: 6. international workshop on radiative properties of hot dense matter, Sarasota, FL (United States), 31 Oct - 4 Nov 1994; Other Information: PBD: 4 Jan 1995
- Country of Publication:
- United States
- Language:
- English
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