Theoretical modeling of laser-matter interaction in spatial filter pinholes for high-energy pulsed lasers

Florian Bonneau; Patrick Combis

doi:10.1117/12.344408

7 April 1999 Theoretical modeling of laser-matter interaction in spatial filter pinholes for high-energy pulsed lasers

Florian Bonneau, Patrick Combis

Proceedings Volume 3578, Laser-Induced Damage in Optical Materials: 1998; (1999) https://doi.org/10.1117/12.344408
Event: Laser-Induced Damage in Optical Materials: 1998, 1998, Boulder, CO, United States

Abstract

A major concern in Megajoules and NIF laser studies is the spatial filter pinhole closure. The answer to this problem is a new pinhole architecture and suitable materials. The conical pinhole design at LLNL is the best candidate tested on the NIF prototype: Beamlet. We have investigated the material dependence in terms of laser-solid and laser-plasma interaction. We have demonstrated that a proper choice of material delays the plasma build-up to the end of the ICF drive pulse. To model the pre-plasma step, it is necessary to take into account optical and thermal parameters of the material, and processes of transition, fusion and vaporization. Preliminary calculations predicted the observed material dependence.

Citation Download Citation

Florian Bonneau and Patrick Combis "Theoretical modeling of laser-matter interaction in spatial filter pinholes for high-energy pulsed lasers", Proc. SPIE 3578, Laser-Induced Damage in Optical Materials: 1998, (7 April 1999); https://doi.org/10.1117/12.344408

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