Author: Glenn, S.M.
Paper Title Page
MOCOBAB04 The Advanced Radiographic Capability, a Major Upgrade of the Computer Controls for the National Ignition Facility 39
 
  • G.K. Brunton, A.I. Barnes, G.A. Bowers, C.M. Estes, J.M. Fisher, B.T. Fishler, S.M. Glenn, B. Horowitz, L.M. Kegelmeyer, L.J. Lagin, A.P. Ludwigsen, D.T. Maloy, C.D. Marshall, D.G. Mathisen, J.T. Matone, D.L. McGuigan, M. Paul, R.S. Roberts, G.L. Tietbohl, K.C. Wilhelmsen
    LLNL, Livermore, California, USA
 
  Funding: This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. #LLNL-ABS-633793
The Advanced Radiographic Capability (ARC) currently under development for the National Ignition Facility (NIF) will provide short (1-50 picoseconds) ultra high power (>1 Petawatt) laser pulses used for a variety of diagnostic purposes on NIF ranging from a high energy x-ray pulse source for backlighter imaging to an experimental platform for fast-ignition. A single NIF Quad (4 beams) is being upgraded to support experimentally driven, autonomous operations using either ARC or existing NIF pulses. Using its own seed oscillator, ARC generates short, wide bandwidth pulses that propagate down the existing NIF beamlines for amplification before being redirected through large aperture gratings that perform chirped pulse compression, generating a series of high-intensity pulses within the target chamber. This significant effort to integrate the ARC adds 40% additional control points to the existing NIF Quad and will be deployed in several phases over the coming year. This talk discusses some new unique ARC software controls used for short pulse operation on NIF and integration techniques being used to expedite deployment of this new diagnostic.
 
slides icon Slides MOCOBAB04 [3.279 MB]  
 
THCOCA03 High-Precision Timing of Gated X-Ray Imagers at the National Ignition Facility 1449
 
  • S.M. Glenn, P.M. Bell, L.R. Benedetti, M.W. Bowers, D.K. Bradley, B.P. Golick, J.P. Holder, D.H. Kalantar, S.F. Khan, N. Simanovskaia
    LLNL, Livermore, California, USA
 
  Funding: This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. #LLNL-ABS-633013
The National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory is a stadium-sized facility that contains a 192-beam, 1.8-Megajoule, 500-Terawatt, ultraviolet laser system together with a 10-meter diameter target chamber. We describe techniques used to synchronize data acquired by gated x-ray imagers with laser beams at the National Ignition Facility (NIF). Synchronization is achieved by collecting data from multiple beam groups with spatial and temporal separation in a single NIF shot. By optimizing the experimental setup and data analysis, repeatable measurements of 15ps or better have been achieved. This demonstrates that the facility timing system, laser, and target diagnostics, are highly stable over year-long time scales.
 
slides icon Slides THCOCA03 [1.182 MB]