Share Email Print
cover

Proceedings Paper

Effects on beam alignment due to neutron-irradiated CCD images at the National Ignition Facility
Author(s): Abdul A. S. Awwal; Anastacia Manuel; Philip Datte; Mark Eckart; Mark Jackson; Steve Azevedo; Scott Burkhart
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The 192 laser beams in the National Ignition Facility (NIF) are automatically aligned to the target-chamber center using images obtained through charged-coupled-device (CCD) cameras. Several of these cameras are in and around the target chamber during an experiment. Current experiments for the National Ignition Campaign are attempting to achieve nuclear fusion. Neutron yields from these high-energy fusion shots expose the alignment cameras to neutron radiation. The present work explores modeling and predicting laser alignment performance degradation due to neutron radiation effects, and introduces techniques to mitigate performance degradation. Camera performance models have been created based on the predicted camera noise from the cumulative neutron fluence at the camera location. We have found that the effect of the neutron-generated noise for all shots to date have been well within the alignment tolerance of half a pixel, and image processing techniques can be utilized to reduce the effect even further on the beam alignment to target.

Paper Details

Date Published: 22 September 2011
PDF: 9 pages
Proc. SPIE 8134, Optics and Photonics for Information Processing V, 81340J (22 September 2011); doi: 10.1117/12.897312
Show Author Affiliations
Abdul A. S. Awwal, Lawrence Livermore National Lab. (United States)
Anastacia Manuel, Lawrence Livermore National Lab. (United States)
Philip Datte, Lawrence Livermore National Lab. (United States)
Mark Eckart, Lawrence Livermore National Lab. (United States)
Mark Jackson, Lawrence Livermore National Lab. (United States)
Steve Azevedo, Lawrence Livermore National Lab. (United States)
Scott Burkhart, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 8134:
Optics and Photonics for Information Processing V
Khan M. Iftekharuddin; Abdul Ahad Sami Awwal, Editor(s)

© SPIE. Terms of Use
Back to Top