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11 September 2020 Current and Future Damage Management at the National Ignition Facility
Zhi M. Liao
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Proceedings Volume 11514, Laser-induced Damage in Optical Materials 2020; 115141B (2020) https://doi.org/10.1117/12.2571485
Event: SPIE Laser Damage, 2020, Online Only
Abstract
We have previously shown that most of the laser-induced damage which occurs at the National Ignition Facility’s (NIF) Grading Debris Shields (GDS) is due to energetic, micron-scale particles generated by the laser interacting with other parts of the beamline. In this work we will review the mitigation strategies devised with an emphasis on the implementation and testing of a Fused Silica Debris Shield (FSDS). The preliminary results from the initial online test suggest that we are approaching intrinsic (debris free) damage levels where fluence distributions once again dominate initiation rates. We will explore the challenge of future projections of damage initiation and optics lifetime where we will need to model the maximum fluence at each location on an optic (i.e. Max-of-N) and how it increases with shot number.
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Zhi M. Liao "Current and Future Damage Management at the National Ignition Facility", Proc. SPIE 11514, Laser-induced Damage in Optical Materials 2020, 115141B (11 September 2020); https://doi.org/10.1117/12.2571485
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KEYWORDS
National Ignition Facility
Laser induced damage
Particles
Silica
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