LMJ timing and fiducial system: Overview of the global architecture and performances

摘要

The Laser MegaJoule (LMJ) timing system has to synchronize 176 laser beams better than 40 ps rms to compress symmetrically the millimeter-size target in order to ignite the deuterium and tritium filled capsule despite the fact that the quadruplet laser sources are separated within the building by several hundreds of meters. This kind of performance is also required for fiducial pulses used to temporally mark laser and plasma diagnostics. After the LMJ was officially commissioned on October 23 2014 with a first successful physics campaign, this article offers an overview of the final overall timing system architecture and its performances. The latest results since our presentation during the previous EFTF conference edition [1] as part of ongoing studies on time drifts are also presented.