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Proceedings Paper

Laser-induced damage simulations of silica surface under 1.053-um irradiation
Author(s): Florian Bonneau; Patrick Combis; G. Daval; J. B. Gaudry
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Paper Abstract

Simulations of laser-silica interaction at 1.053 and 0.351 micrometers is a key issue in predicting and quantifying laser damage in large laser systems such as LIL, LMJ or NIF. Laser induced damage will occur in many locations. Pure intrinsic (defect free materials) laser damage of real world fused silica does not exist in the nanosecond pulse length range. That is why many attempts to model laser damage using intrinsic properties failed. It does not mean that intrinsic phenomena (avalanche ionization...) do not play a role in laser damage. We have introduced extrinsic features of fused silica in our calculations. Surface defects are modeled in terms of electronic density gradients. We use Monte Carlo simulation to extract avalanche ionization coefficients and collision frequencies. We use fluid equations to determine electric conductivity and compute the electric field distribution with Helmholtz equation in our 1D hydrodynamic DELPOR code where Joule heating, thermal conduction and electron diffusion are taken into account.

Paper Details

Date Published: 12 April 2001
PDF: 9 pages
Proc. SPIE 4347, Laser-Induced Damage in Optical Materials: 2000, (12 April 2001); doi: 10.1117/12.425036
Show Author Affiliations
Florian Bonneau, CEA Bruyeres-le-Chatel (France)
Patrick Combis, CEA Bruyeres-le-Chatel (France)
G. Daval, CEA Bruyeres-le-Chatel (France)
J. B. Gaudry, CEA Bruyeres-le-Chatel (France)

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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