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Proceedings Paper

Programmable beam spatial shaping system for the National Ignition Facility
Author(s): John Heebner; Michael Borden; Phil Miller; Steve Hunter; Kim Christensen; Michael Scanlan; Chris Haynam; Paul Wegner; Mark Hermann; Gordon Brunton; Eddy Tse; Abdul Awwal; Nan Wong; Lynn Seppala; Mark Franks; Ed Marley; Kevin Williams; Tracy Budge; Mark Henesian; Christopher Stolz; Tayyab Suratwala; Marcus Monticelli; Dan Walmer; Sham Dixit; Clay Widmayer; Justin Wolfe; Jeff Bude; Kelly McCarty; Jean-Michel DiNicola
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Paper Abstract

A system of customized spatial light modulators has been installed onto the front end of the laser system at the National Ignition Facility (NIF). The devices are capable of shaping the beam profile at a low-fluence relay plane upstream of the amplifier chain. Their primary function is to introduce "blocker" obscurations at programmed locations within the beam profile. These obscurations are positioned to shadow small, isolated flaws on downstream optical components that might otherwise limit the system operating energy. The modulators were designed to enable a drop-in retrofit of each of the 48 existing Pre Amplifier Modules (PAMs) without compromising their original performance specifications. This was accomplished by use of transmissive Optically Addressable Light Valves (OALV) based on a Bismuth Silicon Oxide photoconductive layer in series with a twisted nematic liquid crystal (LC) layer. These Programmable Spatial Shaper packages in combination with a flaw inspection system and optic registration strategy have provided a robust approach for extending the operational lifetime of high fluence laser optics on NIF.

Paper Details

Date Published: 19 February 2011
PDF: 6 pages
Proc. SPIE 7916, High Power Lasers for Fusion Research, 79160H (19 February 2011); doi: 10.1117/12.875794
Show Author Affiliations
John Heebner, Lawrence Livermore National Lab. (United States)
Michael Borden, Lawrence Livermore National Lab. (United States)
Phil Miller, Lawrence Livermore National Lab. (United States)
Steve Hunter, Lawrence Livermore National Lab. (United States)
Kim Christensen, Lawrence Livermore National Lab. (United States)
Michael Scanlan, Lawrence Livermore National Lab. (United States)
Chris Haynam, Lawrence Livermore National Lab. (United States)
Paul Wegner, Lawrence Livermore National Lab. (United States)
Mark Hermann, Lawrence Livermore National Lab. (United States)
Gordon Brunton, Lawrence Livermore National Lab. (United States)
Eddy Tse, Lawrence Livermore National Lab. (United States)
Abdul Awwal, Lawrence Livermore National Lab. (United States)
Nan Wong, Lawrence Livermore National Lab. (United States)
Lynn Seppala, Lawrence Livermore National Lab. (United States)
Mark Franks, Lawrence Livermore National Lab. (United States)
Ed Marley, Lawrence Livermore National Lab. (United States)
Kevin Williams, Lawrence Livermore National Lab. (United States)
Tracy Budge, Lawrence Livermore National Lab. (United States)
Mark Henesian, Lawrence Livermore National Lab. (United States)
Christopher Stolz, Lawrence Livermore National Lab. (United States)
Tayyab Suratwala, Lawrence Livermore National Lab. (United States)
Marcus Monticelli, Lawrence Livermore National Lab. (United States)
Dan Walmer, Lawrence Livermore National Lab. (United States)
Sham Dixit, Lawrence Livermore National Lab. (United States)
Clay Widmayer, Lawrence Livermore National Lab. (United States)
Justin Wolfe, Lawrence Livermore National Lab. (United States)
Jeff Bude, Lawrence Livermore National Lab. (United States)
Kelly McCarty, Lawrence Livermore National Lab. (United States)
Jean-Michel DiNicola, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 7916:
High Power Lasers for Fusion Research
Abdul A. S. Awwal; A. Mike Dunne; Hiroshi Azechi; Brian E. Kruschwitz, Editor(s)

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