Ada in Nuclear Fusion Research at the National Ignition Facility

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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.
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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

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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

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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

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Inertial Confinement Fusion
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National Ignition Facility
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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

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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

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Beam Line
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Beam Line Schematic
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Beam Line ComponentsLaser Glass
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Beam Line Componentspotassium dihydrogenphosphat
e (KDP) electro-optical crystals
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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

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Construction

• Target Chamber Assembly
• Laser Bay part I
• Laser Bay part II
• Laser Bay utility spine

Note Internet access required for hyperlinks
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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

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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

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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

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ICCS Common Framework
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ICCS Subsystems
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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

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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

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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

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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.

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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

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Further Information

• National Ignition Facility - http//www.llnl.gov/n
  if/nif.html
• International Conference on Accelerator and Large
  Experimental Physics Control Systems (ICALEPCS)
  2001 conference proceedings - http//www.slac.stan
  ford.edu/econf/C011127/program.html