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Defence & Security

MegaJoule Laser (LMJ) and Laser Integration Line (LIL)

The MegaJoule Laser (LMJ) is one of the most important tools of the French Simulation programme initiated in 1996 by CEA in order to perpetuate the nuclear deterrence after the decision to stop nuclear tests in the Pacific ocean. The aim of the programme is to simulate the conditions of nuclear fusion with 176 laser beams (22 lines of 8 beams) concentrating their power on a few millimeter diameter target. Its prototype, LIL, is today the most powerful laser facility operated in Europe.

Involved in the programme at a very early stage, ALSYMEX is one of the CEA’s main partner, being in charge of:

  • design, manufacturing and on site installation of the LIL and LMJ laser amplifying sections, including opto-mechanical components and associated mechanical infrastructures, following ISO5 to ISO8 cleanliness and vacuum constraints;
  • design, manufacturing and on site installation of the LIL laser diagnostics;
  • maintenance of the LIL mechanical, opto-mechanical and vacuum equipment;
  • design, manufacturing and on site installation of the LMJ laser transport, interfacing the amplifying sections and the experimental sphere;
  • manufacturing of the LMJ experimental sphere protection panels;
  • manufacturing of the LMJ adjustable mirror;
  • operation of the “Sol-Gel” optical coating facility.


Conventional defence

Manufacturing of parts and complex sub-assemblies for defence OEMs.