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24 November 2023 Fusion enabling laser-induced damage reduction, management, and repair strategies at the National Ignition Facility
Christopher W. Carr
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Proceedings Volume 12726, Laser-Induced Damage in Optical Materials 2023; 1272602 (2023) https://doi.org/10.1117/12.2688417
Event: SPIE Laser Damage, 2023, Dublin/Livermore, California, United States
Abstract
The first demonstration of fusion in the laboratory required the National Ignition Facility (NIF) to leverage its novel approach to laser-induced damage; managing laser-induced damage rather than avoiding it. Accepting regular damage to the laser’s final optics allows the NIF to deliver about 300% higher energy on its targets. This mode of operation is made viable by a unique optics maintenance strategy and a variety of damage management and mitigation. We will review the prominent damage mitigation and management technologies which are classified in three categories: Damage Initiation Prevention, Damage Management, and Damage Repair. Examples of these technologies are the Fused Silica Debris Shield, AI driven damage detection, and the CO2 mitigation cone, respectively. We introduce a simple empirical model which both quantifies individual and combined impacts of the technologies on NIF’s optics usage.
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Christopher W. Carr "Fusion enabling laser-induced damage reduction, management, and repair strategies at the National Ignition Facility", Proc. SPIE 12726, Laser-Induced Damage in Optical Materials 2023, 1272602 (24 November 2023); https://doi.org/10.1117/12.2688417
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KEYWORDS
Laser induced damage
National Ignition Facility
Laser welding
Laser optics
Carbon dioxide
Silica
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