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Vol. 55, Special Issue        February 2003
[Sandia National Laboratories]

Albuquerque, New Mexico 87185-0165    ||   Livermore, California 94550-0969
Tonopah, Nevada; Nevada Test Site; Amarillo, Texas

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Computing

The DOE Office of Science's new Genomes to Life Program announced five projects in 2002, including the Sandia-led project, "Carbon Sequestration in Synechococcus Sp.: From Molecular Machines to Hierarchical Modeling." This effort is focused on developing new algorithms, simulation methods and software, and computing infrastructure for computational biology applications. The project also includes an experimental biology investigation to obtain necessary data as well as to prototype the computational biology capabilities on Synechococcus, a marine microrganism important in the global carbon cycle. Eleven in stitutions, including Sandia, are participating in this $19.1 million effort over three years. Grant Heffelfinger, gsheffe@sandia.gov

The next generation of secure videoconferencing was deployed on Sept. 23, 2002. Using new Internet Protocol-based videoconference appliances, the capability reaches all nuclear weapons complex sites over the Accelerated Strategic Computing Initiative's SecureNet computer network. Sandia developed and deployed this capability to provide a more reliable, scalable, and functional communications resource. This event met a significant Advanced Design and Production Technologies milestone by demonstrating the first secure multipoint videoconference among Sandia, Kansas City, Pantex, and Oak Ridge Y12. The next steps will be to include high-resolution data collaboration, large multipoint support, and more sites. (8200, 8900, 9900) Jim Berry, beri@sandia.gov

Classified information sharing with Nuclear Weapons Complex partners via electronic access is growing: 1) Need-to-Know groups and policies coupled with application architecture enhancements enable application deployment and information sharing across the complex; 2) Classified Drawing Viewer provides desktop access to product structure and product drawings; 3) Web FileShare enables the electronic sharing of classified project information, including video streaming; 4) Record of Assembly provides desktop access to weapon system and component assembly traces. This enables engineers to perform orderly analysis of current and historic weapon system configurations. (2900, 9300, 9500, 9600) Gary Rivord, gerivor@sandia.gov

A Three-Dimensional Resistive MagnetoHydroDynamics (3D-R-MHD) option has recently been implemented in the Sandia ALEGRA code and used to simulate z-pinch wire array implosions at a level of detail never before attempted. ALEGRA is being developed as part of the ASCI Applications program, and uses the Nevada finite element code framework. The new 3D-R-MHD modeling capability in ALEGRA is crucial for capturing the Rayleigh-Taylor instabilities that occur in z-pinch wire array implosions, which in turn are critical phenomena in determining the resulting radiation pulse generated in the Z machine. (9200) Paul Yarrington, pyarrin@sandia.gov Sandia's Classified Network (SCN) underwent major enhancements this year: 1) the SCN internal and external connections were made more reliable by implementing network analysis and monitoring tools; 2) Cross-complex messaging, document management, and group authorization became a reality; 3) Eight new engineering and manufacturing applications were put into production; 4) New storage architectures, backup processes, and systems monitoring procedures made these capabilities possible; 5) Customer interactions with the infrastructure were improved via enhanced jumpstart pages, training, searching, and look-and-feel as well as help desk support. (2900, 8900, 9300, 9500, 9600, 9700, 9800, 9900, 14400) William Swartz, wdswart@sandia.gov

Laser welding process models, developed through computational (9100) and experimental validation (1800) efforts, were applied in FY02 to improve processes used in nuclear weapons components. Research into the physics of laser welding processes, to ultimately predict the shape of the final weld, has been a multiyear effort that was introduced to the customer base at Sandia and the Kansas City Plant for the first time this year. The model has been incorporated in the KCP process simulator and is currently being used in AF&F design. (9100, 1800) Justine Johannes, jejohan@sandia.gov

Sandia's Restricted Network (SRN) got a facelift this year. Our need for improved reliability and bandwidth has culminated in a significant upgrade to the core of the SRN and to many high-end user desktops. The team designed and implemented a new scaleable gigabit Ethernet core and distribution layer for the SRN and implemented gigabit Ethernet to the desks of many ASCI code developers and analysts. This work is part of a longer-term direction funded by the IES to improve reliability and the ASCI program to support high-bandwidth needs. (9300, 9200, 9100) Michael Sjulin, mrsjuli@sandia.gov

Many of Sandia's important calculations concerning nuclear weapons stockpile issues run on the fastest computer available, the 10 TeraOps ASCI White supercomputer at Lawrence Livermore National Laboratory ((LLNL). These calculations depend on the transmission of multi-gigabyte data files between LLNL and Sandia. Recent network engineering activities have doubled the routine file transfer performance to 100 MBytes/sec between the two sites by reducing or eliminating network bottlenecks. This accomplishment increases the productivity of Sandia engineers and scientists by reducing the time they have to wait for results. (9300, 8900) Larry Tolendino, lftolen@sandia.gov

Electronic and microelectronic components are critical to Sandia's nuclear weapons mission. Yet we have until now been hindered by the lack of powerful simulation tools in this area such as we have for mechanical systems. Existing industry codes lack the scalability to attack large problems and do not deal with radiation-hardened components. To fill this gap, a new massively parallel circuit modeling code, Xyce, has been developed and released. Xyce has been applied to the rad-hard Pentium adder and multiplier subcircuits and has been used to analyze a series of nuclear weapons circuits. A technical advance for parallel circuit simulation has been filed. (9200,1700) Sudip Dosanjh, ssdosan@sandia.gov

Regarding Red Storm (see entry/illustration on page 4), in addition to working with Cray to build the new 40 TeraOps supercomputer, the Simulation Enabled Product Realization (SEPR) program initiated construction of three major facilities: the Distributed Information Systems Laboratory, the Joint Computational Engineering Laboratory, and the Supercomputing Annex. These key facilities and infrastructure are necessary to realize the SEPR vision of model-based product realization. (9900, 8500, 9100, 9200, 9300, 10800)

Sandia's Technical Library in December 2001 established the Cyberlibrary in the Bldg. 858 mezzanine; there, library staff are providing "high tech/high touch" information services, working with Sandians to best use digital resources such as electronic full-text journals, indexes, abstracts, standards, and the like available through the Library's Web site (http://infoserve.sandia.gov). The Cyberlibrary's advice is ". . . if you are searching more than 15 minutes on the Internet without success . . . you are 'lost in (cyber) space.' " The Cyberlibrary provides computer workstations, comfortable chairs -- but no paper! (9600, 1700) Julie Kesti, jakesti@sandia.gov

Last modified: March 14 , 2002


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