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Proceedings Paper

A statistical method for determining the dimensions, tolerances and specification of optics for the Laser Megajoule facility (LMJ)
Author(s): Vincent Denis
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Paper Abstract

This paper presents a statistical method for determining the dimensions, tolerance and specifications of components for the Laser MegaJoule (LMJ). Numerous constraints inherent to a large facility require specific tolerances: the huge number of optical components; the interdependence of these components between the beams of same bundle; angular multiplexing for the amplifier section; distinct operating modes between the alignment and firing phases; the definition and use of alignment software in the place of classic optimization. This method provides greater flexibility to determine the positioning and manufacturing specifications of the optical components. Given the enormous power of the Laser MegaJoule (over 18 kJ in the infrared and 9 kJ in the ultraviolet), one of the major risks is damage the optical mounts and pollution of the installation by mechanical ablation. This method enables estimation of the beam occultation probabilities and quantification of the risks for the facility. All the simulations were run using the ZEMAX-EE optical design software.

Paper Details

Date Published: 27 September 2008
PDF: 11 pages
Proc. SPIE 7100, Optical Design and Engineering III, 71001E (27 September 2008); doi: 10.1117/12.796704
Show Author Affiliations
Vincent Denis, CEA CESTA (France)

Published in SPIE Proceedings Vol. 7100:
Optical Design and Engineering III
Laurent Mazuray; Jean-Luc Tissot; Jeffrey M. Raynor; Rolf Wartmann; Andrew Wood, Editor(s)

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