Numéro |
J. Phys. IV France
Volume 133, June 2006
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Page(s) | 653 - 655 | |
DOI | https://doi.org/10.1051/jp4:2006133130 | |
Publié en ligne | 16 juin 2006 |
J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 653-655
DOI: 10.1051/jp4:2006133130
Propagation of LIL/LMJ beams under the interaction with contamination particles and component surface defects
S. Mainguy and B. Le GarrecCommissariat à l'Énergie Atomique, CEA/DAM/CESTA/DLP, BP. 2, 33114 Le Barp, France
Abstract
This paper presents recent studies of the propagation of
high-power laser beams like Laser Integration Line (LIL) and Laser MegaJoule
(LMJ) beams, when interactions occur with environmental pollution particles
and component defects. The studies are mainly achieved with the CEA-DAM
MIRÓ beam propagation code. The highest intensifications in the
downstream propagation are obtained for phase objects like dielectric
particles, scratches or laser damage rather than for amplitude objects like
metallic particles. Dramatic amplification of Kerr nonlinear effect leading
to beam self-focusing inside the component is predicted depending on the
particle size. The effect of statistical distributions of end-of-line phase
defects on the LIL/LMJ 0.351-m-wavelength focal spot intensity and
size is quantified.
© EDP Sciences 2006