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Proceedings Paper

Angle-resolved scatter measurements of laser-damaged DKDP crystals using a bidirectional scatter diagnostics
Author(s): Regula Fluck; Paul J. Wegner; Lynn Matthew Sheehan; Lloyd A. Hackel
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Paper Abstract

We built a bi-directional scatter diagnostic to measure and quantify losses due to scattering and absorption in harmonic generation crystals (DKDP) for the National Ignition Facility. The diagnostic performs angle-resolved photometry at 351 nm, and is capable of both near-specular transmission and large angle scatter measurements. In the near-specular configuration, the transmission can be measured with variable acceptance angle ranging from +/- 65 (mu) rad up to +/- 60 mrad. A silicon photo detector and a scientific- grade CCD camera quantify total energy and energy distribution. A linear swing arm detection system enables large angle scatter measurements of 360 degree(s), in principal, with step sizes as small as 0.01 degree(s) and variable collection angle ranging from 1 to 20 mrad. The design of this instrument and its application to the measurement of optical scatter from laser damage and final finishing process of DKDP are discussed.

Paper Details

Date Published: 12 April 2001
PDF: 9 pages
Proc. SPIE 4347, Laser-Induced Damage in Optical Materials: 2000, (12 April 2001); doi: 10.1117/12.425048
Show Author Affiliations
Regula Fluck, Lawrence Livermore National Lab. (United States)
Paul J. Wegner, Lawrence Livermore National Lab. (United States)
Lynn Matthew Sheehan, Lawrence Livermore National Lab. (Ireland)
Lloyd A. Hackel, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 4347:
Laser-Induced Damage in Optical Materials: 2000
Gregory J. Exarhos; Arthur H. Guenther; Mark R. Kozlowski; Keith L. Lewis; M. J. Soileau, Editor(s)

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