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Ada in Nuclear Fusion Research at the National Ignition Facility

Ada in Nuclear Fusion Research at the National Ignition Facility

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Ada in Nuclear Fusion Research at the National Ignition Facility

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  1. Ada in Nuclear Fusion Research at the National Ignition Facility or How Does a Really Big Laser Hit a Very Small Target? Victor Giddings Objective Interface Systems, Inc.

  2. Disclaimer • This presentation is extracted from publicly available material provided by the National Ignition Facility • It is not a product of and has not been reviewed by Lawrence Livermore National Laboratory or the NIF project

  3. National Ignition Facility • Will contain a very big laser • 192 beams each with a path 510 meters • 1.8 megajoules • 500 terawatt • 351 nm wavelength • Focused on a very small target • 600 µm diameter volume • 108 K • 1011 atmospheres

  4. National Ignition Facility • Missions • Stockpile Stewardship Program (DoE) • Inertial Confinement Fusion • High-energy-density research • DoE facility • At Lawrence Livermore National Laboratory • In conjunction with Sandia National Laboratory

  5. Inertial Confinement Fusion

  6. National Ignition Facility

  7. NIF in a Nut Shell • Start with nano Joule coherent pulse • Split it 192 ways • Multiply each by 1013 while maintaining • Spatial • Spectral and • Temporal characteristics • Recombine • 600 µm diameter volume • With 50 µm accuracy

  8. Some Technical Challenges • Largest laser ever built • Beam line components of sizes never built • Component count, diagnostic requirement • Housed in very large clean room • Entire facility - class 10,000 clean room • Optics and 8,000 square foot optical assembly building –class 100

  9. Beam Line

  10. Beam Line Schematic

  11. Beam Line ComponentsLaser Glass

  12. Beam Line Componentspotassium dihydrogenphosphate (KDP) electro-optical crystals

  13. Status • Conventional construction nearly completed • Over 1500 tons of beam path infrastructure installed • Expect first laser test by end of year – to switch yard entry • 2004: “First light” – four beams to target chamber center – first experiments start • 2008: Full complement of 192 beams

  14. Construction • Target Chamber Assembly • Laser Bay – part I • Laser Bay – part II • Laser Bay – utility spine Note: Internet access required for hyperlinks above

  15. Integrated Computer Control System (ICCS) • 300 Front-End Processors of 18 types • + Supervisor Systems • 60,000 controls • 45,000 device control points – e.g., stepping motors, transient digitizers, calorimeters, photodiodes. • 14,000 industrial controls – e.g., vacuum, argon, synthetic air, and safety interlocks • Around the clock operation

  16. ICCS Hardware Technologies • Front end processors • PowerPC or UltraSPARC processors • MVE or PCI bus cages • Supervisory servers • SPARC Solaris • Consoles • SPARC Solaris • Network • Ethernet • ATM for 10 Hz video multicast from 1 of 500 cameras

  17. ICCS Services • Machine Configuration • Allocated to front-end devices • No real-time critical traffic on network • Archiving • Graphical User Interface • Monitoring • Event Logging • Scripting • Alert Management • Access Control

  18. ICCS Common Framework

  19. ICCS Subsystems

  20. ICCS Framework • Framework templates define the architecture for each type of process in ICCS: • Supervisory Shot Control Processes • Supervisory Status and Control Processes • Front End Processors • Graphical User Interfaces • Frameworks also provide utility services: • Configuration • Messaging (Events, Alerts, Logging) • Status Monitoring • Reservation • Archiving • Sequence Control

  21. ICCS Software Technologies • Ada (Apex) for • Front End Processes • Supervisory Processes • Java for User Interface • CORBA for Distributed Objects • ORBexpress for Ada • Visibroker for Java • UML for design – Rational Rose

  22. CORBA Usage • 300 CORBA IDL classes • 150 device • 50 framework • 100 supervisor • 100,000 instances • 60,000 reflecting control points • 40,000 for supervisory or user interface reflections, summaries, policies, or controls

  23. ICCS Status • Anticipate about 1M sloc • 350K slot developed • Incremental and iterative build cycles • 7 cycles completed to date • Delivery to Front End Integration System Test lab • 5 of the 10 supervisory subsystems • 7 of 16 FEPs.

  24. Credits • Moses, E. I., “The National Ignition Facility: Status And Plans For Laser Fusion And High-Energy-Eensity Experimental Studies”, ICALEPCS 2001 • Lagin, L. J., et al, “Overview of the National Ignition Facility Distributed Computer Control System”,ICALEPCS 2001 • Carey, R. W., et al, “Large-scale Corba-distributed Software Framework For Nif Controls”,ICALEPCS 2001 • Woodruff, J. P., et al, “QUALITY CONTROL, TESTING AND DEPLOYMENT RESULTS IN NIF ICCS”, ICALEPCS 2001 • Most pictures and all movies from NIF web site: http://www.llnl.gov/nif/nif.html

  25. Further Information • National Ignition Facility - http://www.llnl.gov/nif/nif.html • International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS) 2001 conference proceedings - http://www.slac.stanford.edu/econf/C011127/program.html