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Proceedings Paper

Assembling and installing LRUs for NIF
Author(s): Regina E. Bonanno
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Paper Abstract

Within the 192 National Ignition Facility (NIF) beamlines, there are over 7000 large (40 × 40 cm) optical components, including laser glass, mirrors, lenses, and polarizers. These optics are held in large opto-mechanical assemblies called linereplaceable units (LRUs). Each LRU has strict specifications with respect to cleanliness, alignment, and wavefront so that once activated, each NIF beamline will meet its performance requirements. NIF LRUs are assembled, tested, and refurbished in on-site cleanroom facilities. The assembled LRUs weigh up to 1800 kilograms, and are about the size of a phone booth. They are transported in portable clean canisters and inserted into the NIF beampath using robotic transporters. This plug and play design allows LRUs to be easily removed from the beampath for maintenance or upgrades. Commissioning of the first NIF quad, an activity known as NIF Early Light (NEL), has validated LRU designs and architecture, as well as demonstrated that LRUs can be assembled and installed as designed. Furthermore, it has served to develop key processes and tools forming the foundation for NIF s long-term LRU production and maintenance strategy. As we look forward to building out the rest of NIF, the challenge lies in scaling up the production rate while maintaining quality, implementing process improvements, and fully leveraging the learning and experience gained from NEL. This paper provides an overview of the facilities, equipment and processes used to assemble and install LRUs in NIF.

Paper Details

Date Published: 28 May 2004
PDF: 9 pages
Proc. SPIE 5341, Optical Engineering at the Lawrence Livermore National Laboratory II: The National Ignition Facility, (28 May 2004); doi: 10.1117/12.538479
Show Author Affiliations
Regina E. Bonanno, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 5341:
Optical Engineering at the Lawrence Livermore National Laboratory II: The National Ignition Facility
Monya A. Lane; Craig R. Wuest, Editor(s)

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