
Proceedings Paper
Detection of Hohlraum target position for laser fusion experimentsFormat | Member Price | Non-Member Price |
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Paper Abstract
A hohlraum is a cylindrical structure that holds a laser fusion target at the National Ignition Facility. It must be aligned
properly for all the 192 laser beams to hit the target and cause a fusion reaction. Video images of the hohlraum are used
to align the hohlraum to the required position. A matched filtering based approach is used to locate the circular
alignment fiducial of the hohlraum. One of the challenges of the automatic alignment algorithm is the presence of a
number of nearly concentric features from which only one will provide the valid position information. The problem is
compounded by blurring of relevant features by defocus or insufficient illumination and amplification of non-relevant
features. It is shown that to identify the appropriate fiducial; the shape (or size) in addition to amplitude of correlation
peak must be considered.
Paper Details
Date Published: 7 September 2010
PDF: 7 pages
Proc. SPIE 7797, Optics and Photonics for Information Processing IV, 77970G (7 September 2010); doi: 10.1117/12.861994
Published in SPIE Proceedings Vol. 7797:
Optics and Photonics for Information Processing IV
Abdul Ahad Sami Awwal; Khan M. Iftekharuddin; Scott C. Burkhart, Editor(s)
PDF: 7 pages
Proc. SPIE 7797, Optics and Photonics for Information Processing IV, 77970G (7 September 2010); doi: 10.1117/12.861994
Show Author Affiliations
Abdul A. S. Awwal, Lawrence Livermore National Lab. (United States)
Published in SPIE Proceedings Vol. 7797:
Optics and Photonics for Information Processing IV
Abdul Ahad Sami Awwal; Khan M. Iftekharuddin; Scott C. Burkhart, Editor(s)
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