Initiation, Growth and Mitigation of UV Laser Induced Damage in Fused Silica [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 2003.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- PDF-FILE: 19; SIZE: 10 MBYTES pages
- Additional Creators:
- Lawrence Livermore National Laboratory
United States. Department of Energy
United States. Department of Energy. Office of Scientific and Technical Information
- Laser damage of large fused silica optics initiates at imperfections. Possible initiation mechanisms are considered. We demonstrate that a model based on nanoparticle explosions is consistent with the observed initiation craters. Possible mechanisms for growth upon subsequent laser irradiation, including material modification and laser intensification, are discussed. Large aperture experiments indicate an exponential increase in damage size with number of laser shots. Physical processes associated with this growth and a qualitative explanation of self-accelerated growth is presented. Rapid growth necessitates damage growth mitigation techniques. Several possible mitigation techniques are mentioned, with special emphasis on CO₂ processing. Analysis of material evaporation, crack healing, and thermally induced stress are presented.
- Published through SciTech Connect.
Laser-Matter Interaction-11, St. Petersburg (RU), 06/30/2003--07/02/2003.
Feit, M D; Rubenchik, A M.
- Funding Information:
View MARC record | catkey: 14399708