Los Alamos Opacities: Transition from LEDCOP to ATOMIC
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)
- Applied Theory Division, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)
This paper discusses the development of the ATOMIC code, a new low to mid Z opacity code, which will replace the current Los Alamos low Z opacity code LEDCOP. The ATOMIC code is based on the FINE code, long used by the Los Alamos group for spectral comparisons in local thermodynamic equilibrium (LTE) and for non-LTE calculations, utilizing the extensive databases from the atomic physics suite of codes based on the work of R. D. Cowan. Many of the plasma physics packages in LEDCOP, such as line broadening and free-free absorption, are being transferred to the new ATOMIC code. A new equation of state (EOS) model is being developed to allow higher density calculations than were possible with either the FINE or LEDCOP codes. Extensive modernization for both ATOMIC and the atomic physics code suites, including conversion to Fortran 90 and parallelization, are under way to speed up the calculations and to allow the use of expanded databases for both the LTE opacity tables and the non-LTE calculations. Future plans will be outlined, including considerations for new generation opacity tables.
- OSTI ID:
- 20630242
- Journal Information:
- AIP Conference Proceedings, Vol. 730, Issue 1; Conference: 14. APS topical conference on atomic processes in plasmas, Santa Fe, NM (United States), 19-22 Apr 2004; Other Information: DOI: 10.1063/1.1824868; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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