We will present in this paper the latest development made in the frame of High repetition rate PW laser. Increasing the repetition rate in high energy laser requires to master a lot of different parameters and especially the cooling and the reliability.
We have worked in this direction in the frame of two projects: ELI ALPS in hungaria and HIBEF in Germany.
We will show in the talk the developments that we have accomplished to reach at the same time a high energy and a high average power: specific pump laser (50J at 10Hz), High average power cryo cooling.
We will also focus on the reliability of these systems and present the results gathered during the last months.