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Laser MégaJoule Project  (LMJ)


The Laser MégaJoule (LMJ) is one of the most important tools in the CEA's Simulation program which Codra has worked on since 2007.

The objective of the LMJ project is to recreate, in the laboratory, the thermodynamic conditions similar to those occurring in a nuclear explosion. It will enable theoreticians and weapons designers to analyze the results of an actual nuclear fusion.
Among Codra's contributions to the LMJ project, we developed the SVP (Surveillance and Monitoring) system used in LMJ level 2 (N2) supervision. This system supervises and monitors all the LMJ instrumentation & control systems.
Device coupling is performed by controllers located in level 0 (N0). SVP is therefore not directly coupled with the devices: it relies entirely on application-specific SCADA systems located in the instrumentation & control system in level 1 (N1). Each application contains a CCE (Instrumentation & Control Package) providing application-specific supervision and device control systems.

© Ph.Labeguerie - CEA -  The experiment room


SVP is used to:

  • display and monitor the plant status
  • control the plant automatically, using sequences
  • enable operators to coordinate device monitoring
  • warn operators via alarms
  • assess equipment and function availability
  • force a specific operating mode on all or part of the plant
  • provide long-term traceability

Codra is also responsible for developing the common components. These are custom functions added to Panorama E² in order to address the LMJ's application-specific requirements.

The PFC4 is divided into several subsystems, including:

  • Resource Management System
  • LJM Sequencing System (with extensions)
  • Log System
  • Infrastructure System

The C# language is used for most of the programming, except for the Log System which was developed in ASP.NET with Ajax (for asynchronous calls).
One of the distinctive features of PFC4 is that it is provided to all the industrial firms working on the LMJ in order to develop their application-specific SCADA solutions.