Use of a near back-scattering imaging system on the National Ignition Facility

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A near back-scattering imaging diagnostic system has been implemented, qualified and fielded on the first quad of beams on the National Ignition Facility. This diagnostic images diffusing scatter plates, placed around the final focus lenses on the NIF target chamber, to quantitatively measure the fraction of light back-scattered outside of the incident cone of the focusing optics. The imaging system consists of a wide-angle lens coupled to a gated CCD camera, providing 3mm resolution over a 2m field of view. To account for changes of the system throughput due to exposure to target debris the system was routinely calibrated in ... continued below

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Mackinnon, A J; Niemann, C; Piston, K; Holtmeier, G; McCarville, T J; Jones, G et al. May 1, 2006.

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A near back-scattering imaging diagnostic system has been implemented, qualified and fielded on the first quad of beams on the National Ignition Facility. This diagnostic images diffusing scatter plates, placed around the final focus lenses on the NIF target chamber, to quantitatively measure the fraction of light back-scattered outside of the incident cone of the focusing optics. The imaging system consists of a wide-angle lens coupled to a gated CCD camera, providing 3mm resolution over a 2m field of view. To account for changes of the system throughput due to exposure to target debris the system was routinely calibrated in situ at 532nm and 355nm using a dedicated pulsed laser source. The diagnostic and calibration methods will be described together with recent results from the NIF early light shots.

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PDF-file: 15 pages; size: 2 Mbytes

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  • Presented at: High Temperature Plasma Diagnostics, Williamsburg, VA, United States, May 07 - May 11, 2006

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  • Report No.: UCRL-CONF-221190
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 899385
  • Archival Resource Key: ark:/67531/metadc879176

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  • May 1, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 2, 2016, 5:06 p.m.

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Mackinnon, A J; Niemann, C; Piston, K; Holtmeier, G; McCarville, T J; Jones, G et al. Use of a near back-scattering imaging system on the National Ignition Facility, article, May 1, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc879176/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.