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17 December 2024 Laser driver developments at CEA from the pioneers to the LMJ
C. Lacombe, J. Neauport, C. Rouyer
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Proceedings Volume 13190, Laser-Induced Damage in Optical Materials 2024; 1319002 (2024) https://doi.org/10.1117/12.3032778
Event: SPIE Laser Damage, 2024, San Ramon, CA, United States
Abstract
The year 2024 will mark the 10th anniversary of the commissioning of the Laser Megajoule (LMJ) Inertial Confinement Fusion Laser first bundle of 8 laser beams. About 400 experiments on target were carried out in this period of time. Currently 11 bundles are in operation at half energy and power for experiments delivering up to 330kJ UV on target. The full system will be completed within few years. In this paper, we take the opportunity of the anniversary to look back from the beginning. We detail an historical review of the laser system development carried out at CEA DAM since 1962. We illustrate the different laser systems built and how they evolved as laser technology evolved with some pioneering results from frequency conversion to pulse compression. We then detail the LMJ design and architecture and focus on laser damage management in the different sub-assemblies of the system. We review the performance reached at half/energy and power with half bundles completed. We finally show the laser campaign performed since 2021 to test the energy/power increase on a few numbers of bundles, preparing the LMJ operation at full performance.
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(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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C. Lacombe, J. Neauport, and C. Rouyer "Laser driver developments at CEA from the pioneers to the LMJ", Proc. SPIE 13190, Laser-Induced Damage in Optical Materials 2024, 1319002 (17 December 2024); https://doi.org/10.1117/12.3032778
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KEYWORDS
Laser development
Pulsed laser operation
Beam diameter
Laser systems engineering
Optics manufacturing
Plasmas
Laser welding
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