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Proceedings Paper

Interactions between x-ray induced transient defects and pre-existing damage precursors in DKDP crystals
Author(s): R. A. Negres; C. K. Saw; S. G. Demos
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Paper Abstract

Large-aperture laser systems, currently designed to achieve high energy densities at the target location (exceeding ~ 1011 J/m3), will enable studies of the physics of matter and radiation under extreme conditions. As a result, their optical components, such as the frequency conversion crystals (KDP/DKDP), may be exposed to X-rays and other ionizing radiation. This in turn may lead to a change in the damage performance of these materials as they may be affected by radiation-induced effects by either forming new damage initiation centers or interacting with the pre-existing damage initiating defects (so-called damage precursors). We present an experimental study on the laser-induced bulk damage performance at 355-nm of DKDP crystals following X-ray irradiation at room temperature. Results indicate that the damage performance of the material is affected by exposure to X-rays. We attribute this behavior to a change in the physical properties of the precursors which, in turn, affect their individual damage threshold.

Paper Details

Date Published: 30 December 2008
PDF: 7 pages
Proc. SPIE 7132, Laser-Induced Damage in Optical Materials: 2008, 713212 (30 December 2008); doi: 10.1117/12.804246
Show Author Affiliations
R. A. Negres, Lawrence Livermore National Lab. (United States)
C. K. Saw, Lawrence Livermore National Lab. (United States)
S. G. Demos, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 7132:
Laser-Induced Damage in Optical Materials: 2008
Gregory J. Exarhos; Detlev Ristau; M. J. Soileau; Christopher J. Stolz, Editor(s)

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