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Proceedings Article

NIF optical specifications: the importance of the RMS gradient

[+] Author Affiliations
Janice K. Lawson, Jerome M. Auerbach, R. Edward English, Jr., Mark A. Henesian, John T. Hunt, Richard A. Sacks, John B. Trenholme, Wade H. Williams

Lawrence Livermore National Lab. (USA)

Milton J. Shoup III, John H. Kelly, Christopher T. Cotton

Univ. of Rochester (USA)

Proc. SPIE 3492, Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, 336 (July 23, 1999); doi:10.1117/12.354145
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From Conference Volume 3492

  • Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion
  • W. Howard Lowdermilk
  • Monterey, CA | June 07, 1998

abstract

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 of 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 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.

© (1999) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Janice K. Lawson ; Jerome M. Auerbach ; R. Edward English, Jr. ; Mark A. Henesian ; John T. Hunt, et al.
"NIF optical specifications: the importance of the RMS gradient", Proc. SPIE 3492, Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, 336 (July 23, 1999); doi:10.1117/12.354145; http://dx.doi.org/10.1117/12.354145


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