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The Laser MegaJoule (LMJ), a 176-beam laser facility developed by CEA, is located near Bordeaux. It is part of the French Simulation Program, which combines improvement of theoretical models used in various domains of physics and high performance numerical simulation. It is designed to deliver about 1.4 MJ of energy on targets, for high energy density physics experiments, including fusion experiments.
The LMJ technological choices were validated on the LIL, a scale-1 prototype composed of 1 bundle of 4-beams. The first bundle of 8-beams was commissioned in October 2014 with the implementation of the first experiment on the LMJ facility. The operational capabilities are increasing gradually every year until the full completion by 2026. By the end of 2025, 22 bundles of 8-beams will be assembled (full scale) and 19 bundles are expected to be fully operational.
The computer systems are facing many threats with increasingly sophisticated attacks to break through the defenses in place. In addition to existing measures on the LMJ facility, an action plan has been implemented to improve our protection against cyber threats. This article provides an overview of the different measures considered and the impact of their implementation on existing systems.
