LLE Review Volume 115 (April-June 2008)

Technical Report · Thu Oct 09 04:00:00 EDT 2008

DOI:https://doi.org/10.2172/939261· OSTI ID:939261

Marozas, John A. ^[1]

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1. Univ. of Rochester, NY (United States). Lab. for Laser Energetics; Laboratory for Laser Energetics, University of Rochester, Rochester, NY

This volume of the LLE Review, covering April–June 2008, features “Development and Demonstration of Large-Aperture, Tiled-Grating Compressors for the OMEGA EP Petawatt-Class Laser System” by J. Qiao, A. Kalb, D. Canning, T. Nguyen, J. Bunkenburg, and J. H. Kelly. In this article (p. 113), the authors report on the OMEGA EP effort regarding the two large-aperture tiled-grating (1.5-m) compressors. Each compressor, consisting of four sets of tiled-grating assemblies, has been built for the OMEGA EP High-Energy, Petawatt-Class Laser System. The techniques used for tiling individual tiled-grating assemblies and for optimizing the overall performance of a tiled-grating compressor are described. Both compressors achieved subpicosecond-pulse duration without tiling-induced temporal degradation. A ray-tracing model predicted that the static wavefront of the grating tiles dominated focal-spot degradations when submicroradian tiling accuracy is achieved. The tiled-grating compressors delivered a tighter focal spot compared to sub-aperture grating compressors with single central tiles.

• Research Organization: Univ. of Rochester, NY (United States). Laboratory for Laser Energetics
• Sponsoring Organization: USDOE
• DOE Contract Number: FC52-08NA28302
• OSTI ID: 939261
• Report Number(s): DOE/NA--28302-846; 2008-142
• Country of Publication: United States
• Language: English

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