Author: Vermersch, S.
Paper Title Page
MOC3O06 The Laser Megajoule Facility: The Computational System PARC 1
 
  • S. Vermersch
    CEA, LE BARP cedex, France
 
  The Laser MegaJoule (LMJ) is a 176-beam laser facility, located at the CEA CESTA Laboratory near Bordeaux (France). It is designed to deliver about 1.4 MJ of energy to targets, for high energy density physics experiments, including fusion experiments. The assembly of the first line of amplification (8 beams) was achieved in October 2014. A computational system, PARC has been developed and is under deployment to automate the laser setup process, and accurately predicts the laser energy and temporal shape. PARC is based on the computer simulation code MIRO. For each LMJ shot, PARC determines the characteristics of the laser injection system required to achieve the desired main laser output, provide parameter checking needed for all equipment protections, determines the required diagnostic setup, and supplies post-shot data analysis and reporting. This paper presents the first results provided by PARC. It also describe results obtained with the PARC demonstrator during the first experiments conducted on the LMJ facility.  
slides icon Slides MOC3O06 [4.980 MB]  
 
MOPGF076
PARC : An Automated Laser Setup System for the Laser MegaJoule Facility  
 
  • J-P. Airiau, S. Vermersch
    CEA, LE BARP cedex, France
 
  The LMJ* is a 176 beams laser facility, located at the CEA** CESTA laboratory near Bordeaux. It is designed to deliver 1.4 MJ of energy to the target, for high density physics experiment, including fusion experiments. PARC determines the characteristics of the injection laser system, provides parameters checking for equipment protection, calculates the required diagnostic setup, and supplies post-shot data analysis and reporting. The CEA has developed a generic platform including a client/server software using the computational power of a cluster and a smart interface with the Control Command System (CCS). The software compiles and generates runnable sequences composed of heterogeneous simulation modules. PARC uses the configuration data from CCS to parametrize simulation models, executes prediction computation, returns each beam laser setup to CCS and compares simulation and measured data. It finally recalibrates the prediction models like a standard feedback system. This paper firstly describes PARC architecture and the communication protocol with the CCS. Secondly, an execution sequence from the generation process to the execution on the cluster is outlined.
*LMJ: Laser MegaJoule**CEA: French Atomic Energy Commission