Transition from LEDCOP to ATOMIC

Conference · Thu Jan 01 00:00:00 EST 2004

OSTI ID:977858

Magee, N H ^[1]; Abdallah, J ^[2]; Colgan, J ^[3]; Hakel, P ^[4]; Kilcrease, D P ^[5]; Mazevet, S ^[6]; Sherrill, M E ^[7]; Fontes, C J ^[8]; Zhang, H ^[9]

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1. Norman H.
2. Joseph
3. James
4. Peter
5. David P.
6. Stephane
7. Manolo E.
8. Christopher J.
9. Honglin

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, both 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 underway 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 for the code will be outlined, including considerations for new generation opacity tables.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• OSTI ID: 977858
• Report Number(s): LA-UR-04-6483; TRN: US1003744
• Resource Relation: Conference: Submitted to: Proceedings of the 14th APS Topical Conference on Atomic Processes in Plasmas, Santa Fe, New Mexico, April 19-22, 2004
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
ATOMIC PHYSICS
FORTRAN
LINE BROADENING
LTE
OPACITY
PHYSICS
PLASMA
VELOCITY