Laser Megajoule performance status
Jérôme Néauport, J.-P. Airiau, N. Beck, Nicolas Belon, Édouard Bordenave, Stéphane Bouillet, Margaux Chanal, Céline Chappuis, H. Coïc, R. Courchinoux, Vincent Denis, Florian Gaudfrin, Kévin Gaudfrin, Patrick Gendeau, Lilian Heymans, Xavier Julien, Chloé Lacombe, Manon Lamy, Dominique Lebeaux, Michel Luttmann, Philippe Modelin, Arnaud Perrin, X. Ribeyre, C. Rouyer, Florian Tournemenne, Denis Valla, Sébastien Vermersch
Abstract
The Laser Megajoule (LMJ) is among the most energetic inertial confinement fusion laser facilities in the world, together with the National Ignition Facility (NIF) in the USA. The construction of the facility began back in 2003, and the first photons were emitted by the laser bundle #28 in 2014. Today, 11 laser bundles consisting of 88 large aperture 0.35×0.35m 2 laser beams are in operation, delivering daily up to 330 kJ of energy at the wavelength of 351 nm on a target placed in the center of a 10 m diameter vacuum chamber. In this paper, we describe the laser system and its operational performances. We also detail the first laser campaigns carried out to prepare an increase of energy and power on the target. These campaigns, along with the completion of additional bundles mounting, will bring LMJ performance to 1.3 MJ thanks to 22 bundles in operation.