Uncertainty Detection for NIF Normal Pointing Images

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The National Ignition Facility at the Lawrence Livermore National Laboratory when completed in 2009, will deliver 192-beams aligned precisely at the center of the target chamber producing extreme energy densities and pressures. Video images of laser beams along the beam path are used by automatic alignment algorithms to determine the position of the beams for alignment purposes. However, noise and other optical effects may affect the accuracy of the calculated beam location. Realistic estimation of the uncertainty is necessary to assure that the beam is monitored within the clear optical path. When the uncertainty is above a certain threshold the ... continued below

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8 p. (0.4 MB)

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Awwal, A S; Law, C & Ferguson, S W September 11, 2007.

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The National Ignition Facility at the Lawrence Livermore National Laboratory when completed in 2009, will deliver 192-beams aligned precisely at the center of the target chamber producing extreme energy densities and pressures. Video images of laser beams along the beam path are used by automatic alignment algorithms to determine the position of the beams for alignment purposes. However, noise and other optical effects may affect the accuracy of the calculated beam location. Realistic estimation of the uncertainty is necessary to assure that the beam is monitored within the clear optical path. When the uncertainty is above a certain threshold the automated alignment operation is suspended and control of the beam is transferred to a human operator. This work describes our effort to quantify the uncertainty of measurement of the most common alignment beam.

Physical Description

8 p. (0.4 MB)

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PDF-file: 8 pages; size: 0.4 Mbytes

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  • Presented at: SPIE Optics & Photonics, San Diego, CA, United States, Aug 26 - Aug 30, 2007

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  • Report No.: UCRL-CONF-234586
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 925677
  • Archival Resource Key: ark:/67531/metadc899604

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • September 11, 2007

Added to The UNT Digital Library

  • Sept. 27, 2016, 1:39 a.m.

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  • April 17, 2017, 1:10 p.m.

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Awwal, A S; Law, C & Ferguson, S W. Uncertainty Detection for NIF Normal Pointing Images, article, September 11, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc899604/: accessed October 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.