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Author Lagin, L. ♦ Bryant, R. ♦ Carey, R. ♦ Casavant, D. ♦ Demaret, R. ♦ Edwards, O. ♦ Ferguson, W. ♦ Krammen, J. ♦ Larson, D. ♦ Lee, A. ♦ Ludwigsen, P. ♦ Miller, M. ♦ Moses, E. ♦ Nyholm, R. ♦ Reed, R. ♦ Shelton, R. ♦ Van Arsdall, P.J. ♦ Wuest, C.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2003
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations
Subject Keyword Ignition ♦ Control systems ♦ Laser fusion ♦ Laser theory ♦ Automatic control ♦ Laser beams ♦ Structural beams ♦ Optical control ♦ Automatic generation control ♦ Laboratories
Abstract The National Ignition Facility (NIF), currently under construction at the Lawrence Livermore National Laboratory, is a stadium-sized facility containing a 192-beam, 1.8-megajoule, 500-terawatt, ultraviolet laser system together with a 10-meter diameter target chamber with room for nearly 100 experimental diagnostics. When completed, NIF will be the world's largest and most energetic laser experimental system, providing an international center to study inertial confinement fusion and the physics of matter at extreme energy densities and pressures. NIF's 192 energetic laser beams will compress fusion targets to conditions required for thermonuclear burn, liberating more energy than required to initiate the fusion reactions. Laser hardware is modularized into line replaceable units such as deformable mirrors, amplifiers, and multi-function sensor packages that are operated by the integrated computer control system (ICCS). ICCS is a layered architecture of 300 front-end processors attached to nearly 60,000 control points and coordinated by supervisor subsystems in the main control room. The functional subsystems beam control including automatic beam alignment and wavefront correction, laser pulse generation and pre-amplification, diagnostics, pulse power, and timing-implement automated shot control, archive data, and support the actions of fourteen operators at graphic consoles. Object-oriented software development uses a mixed language environment of Ada (for functional controls) and Java (for user interface and database backend). The ICCS distributed software framework uses CORBA to communicate between languages and processors. ICCS software is approximately 3/4 complete with over 750 thousand source lines of code having undergone off-line verification tests and deployed to the facility. NIF has entered the first phases of its laser commissioning program. NIF has now demonstrated the highest energy 1/spl omega/, 2/spl omega/, and 3/spl omega/ beamlines in the world. NIF's target experimental systems are also being installed in preparation for experiments to begin in late 2003. This talk will provide a detailed look at the status of the control system.
Description Author affiliation: Lawrence Livermore Nat. Lab., CA, USA (Lagin, L.; Bryant, R.; Carey, R.; Casavant, D.; Demaret, R.; Edwards, O.; Ferguson, W.; Krammen, J.; Larson, D.; Lee, A.; Ludwigsen, P.; Miller, M.; Moses, E.; Nyholm, R.; Reed, R.; Shelton, R.; Van Arsdall, P.J.; Wuest, C.)
ISBN 078037908X
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2003-10-14
Publisher Place USA
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 882.95 kB
Page Count 4
Starting Page 27
Ending Page 30


Source: IEEE Xplore Digital Library