Author: Martinez-Nieves, C.L.M.
Paper Title Page
MOCPL02 Experiences with Laser Survey Instrument Based Approach to National Ignition Facility Diagnostic Alignments 52
 
  • E.F. Wilson, M.A. Fedorov, J.R. Hoffman, W.A. Howes, M.J. Lewis, C.L.M. Martinez-Nieves, V. Pacheu, N. Shingleton
    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.
The Na­tional Ig­ni­tion Fa­cil­ity (NIF) uses pow­er­ful lasers to com­press tar­gets, to study high en­ergy den­sity physics. So­phis­ti­cated di­ag­nos­tics are placed close to the tar­gets to record the re­sults of each shot. The place­ment of these di­ag­nos­tics rel­a­tive to the tar­get is crit­i­cal to the mis­sion, with align­ment tol­er­ances on the order of 500 mi­crons. The in­te­gra­tion of com­mer­cial laser-based sur­vey in­stru­ments into the NIF con­trol sys­tem has im­proved di­ag­nos­tic align­ment in many ways. The Ad­vanced Track­ing Laser Align­ment Sys­tem (ATLAS) pro­ject in­cor­po­rates com­mer­cial Faro laser tracker in­stru­ments into the di­ag­nos­tic fac­tory and the tar­get cham­ber, im­prov­ing align­ment ac­cu­racy over prior sys­tems. The sys­tem uses mul­ti­ple retrore­flec­tors mounted on each of the di­ag­nos­tic po­si­tion­ers to trans­late to a 6D po­si­tion in the NIF tar­get cham­ber vol­ume. This en­ables a closed loop align­ment process to align each di­ag­nos­tic. This paper pro­vides an overview of how the laser tracker is used in di­ag­nos­tic align­ment, and dis­cusses chal­lenges met by the con­trol sys­tem to achieve this in­te­gra­tion. 		 
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-MOCPL02  
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