In situ characterization of high-intensity laser beams on OMEGA
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623-1299 (United States)
This article details a means of inferring high-intensity laser beam shapes as applied to the 60-beam ultraviolet (UV) (351 nm) OMEGA laser system [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)]. Measurements of the shape, location, and relative fluence of beams on the OMEGA laser system are obtained from x-ray images of the emission from 4-mm-diam, Au-coated pointing targets irradiated by the focused beams. The images are digitally recorded with an array of up to eight pinhole cameras. The image of each beam is corrected for the effect of view angle and conversion efficiency from UV to x rays, and fit to an elliptical super-Gaussian. The best-fit values from multiple views are combined to obtain values of the beam's shape, beam-to-beam relative peak fluence, beam position, and errors thereof. This method allows the beam-to-beam balance and beam pointing to be further improved, if so desired, by providing measurements of these quantities at the target.
- OSTI ID:
- 20722962
- Journal Information:
- Review of Scientific Instruments, Vol. 76, Issue 7; Other Information: DOI: 10.1063/1.1947782; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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