Code developer's guide to the Styx Liaison Library: a software interface for accessing and manipulating Styx opacity data

Technical Report · Mon Apr 01 04:00:00 EST 1985

OSTI ID:5506123

Pfeufer, G W

The Styx Liaison Library (STYXLL) is a new software interface under development on the Cray-1 and Cray X-MP computers at Los Alamos. STYXLL provides standardized techniques for accessing and manipulating gray and multi-group opacity data in Styx format. The first version of STYXLL provides interrogation methods for seeking a list of materials on a random-access Styx opacity file, and for determining the storage parameters of the data defined for these materials. In particular, the query procedures for the opacity files determine, for each requested material found on the file, the first-word disk address, the number of words, and the internal storage substructure for the DS530 data structure (Rosseland absorption and scattering opacities as a function of photon energy and material density and temperature, and Rosseland gray total opacities as a function of material density and temperature). Knowledge of these storage parameters simplifies data acquisition to a set of read specifications from a ''generic'' random-access file. A tutorial illustrates the use of the Styx Liaison Library and examines the output from the interrogation of Styx opacity files. An overview of the Styx data base and a detailed discussion of the query procedures for an opacity file complement the tutorial. A Glossary summarizes the terms used in these discussions.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5506123
• Report Number(s): LA-10381-M; ON: DE85014253
• Country of Publication: United States
• Language: English

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