NIF optical specifications - the importance of the RMS gradient specification

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The performance of the National Ignition Facility (NIF), especially in terms of laser focusability, will be determined by several key factors. One of these key factors is the optical specification for the thousands of large aperture optics that will comprise the 192 beamlines. We have previously reported on the importance of the specification of the power spectral density (PSD) on NIF performance. Recently, we have been studying the importance of long spatial wavelength (>33 mm) phase errors on focusability. We have concluded that the preferred metric for determining the impact of these long spatial wavelength phase errors is the rms ... continued below

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432 Kilobytes pages

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Auerbach, J M; Cotton, C T; English, R E; Henesian, M A; T, Hunt J; Kelly, J H et al. July 6, 1998.

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The performance of the National Ignition Facility (NIF), especially in terms of laser focusability, will be determined by several key factors. One of these key factors is the optical specification for the thousands of large aperture optics that will comprise the 192 beamlines. We have previously reported on the importance of the specification of the power spectral density (PSD) on NIF performance. Recently, we have been studying the importance of long spatial wavelength (>33 mm) phase errors on focusability. We have concluded that the preferred metric for determining the impact of these long spatial wavelength phase errors is the rms phase gradient. In this paper, we outline the overall approach to NIF optical specifications, detail the impact of the rms phase gradient on NIF focusability, discuss its trade-off with the PSD in determining the spot size and review measurements of optics similar to those to be manufactured for NIF.

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432 Kilobytes pages

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  • Third International Conference on Solid State Lasers for Application (SSLA) to Inertial Fusion (ICF), Monterey, CA (US), 06/07/1998--06/12/1998

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  • Report No.: UCRL-JC-130032
  • Report No.: 39DP02000
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 14707
  • Archival Resource Key: ark:/67531/metadc625510

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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.

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  • July 6, 1998

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  • June 16, 2015, 7:43 a.m.

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  • May 6, 2016, 3:36 p.m.

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Auerbach, J M; Cotton, C T; English, R E; Henesian, M A; T, Hunt J; Kelly, J H et al. NIF optical specifications - the importance of the RMS gradient specification, article, July 6, 1998; California. (digital.library.unt.edu/ark:/67531/metadc625510/: accessed December 11, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.