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Laser Integration Line

The Laser Integration Line (LIL) is a prototype of an LMJ laser line. Between its commissioning in 2002 and its closure in early 2014, the LIL was the most powerful laser in Europe in terms of delivered energy. The LIL was used to validate technological choices made for the LMJ (before construction of entire LMJ was started and completed) and set up experiments (targets, measurement systems, etc.). It was the site of many physics experiments for defense and academic applications.

La Ligne d'intégration laser
© CEA

The LIL primarily consists of :

  • A laser line that is a full-scale prototype of one of the LMJ's twenty-two laser lines. Each line of the LMJ contains eight beams, divided into two "quads". One quad was in operation on the LIL. It was used to optimize the entire laser line for use at the LMJ.
  • An experimental chamber at vacuum and measuring 4.5 meters in diameter and weighing 17 metric tons. This is where the target and many measuring instruments were located.
L'intérieur de la chambre de la LIL. Crédit CEA
Inside view of the LIL chamber.© CEA

After 12 years of operation, 1,595 laser pulses generated on targets and 636 experiments conducted on targets, the last experiments at the LIL were conducted in February 2014.
The LIL made it possible to conduct full-scale experiments on all the designs and technologies of subassemblies developed for the laser subsystem and form teams ready to operate the LMJ.

It was also used to conduct experiments for the DAM and the Laser and Plasma Institute's weapons physics programs as part of the policy to provide researchers and industry with access to simulation tools for non-defense applications.

Its performance (laser-beam quality, experimental data, rapidity of progression of experimental sequences, etc.) was improved throughout its operating life.

The results yielded by the LIL were central in demonstrating the contribution of laser experiments to the Simulation Program. Some of these experiments will be reproduced on the LMJ to address the operation of weapons.

 

February 2014 : final campaign

The final campaign was conducted for the benefit of the academic teams of the Laser and Plasma Institute (LULI, Ecole Polytechnique and CELIA at the University of Bordeaux). It was conducted as part of a study on an alternative method of inertial confinement fusion whereby deuterium-tritium is ignited by generating a strong shock in the compressed target.

MàJ: 18/11/2014
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