Recent Developments on the High Repetition Rate Petawatt Laser of ELI ALPS

Development trends of high intensity laser systems points in the direction of increasing the repetition rate towards 10 Hz and beyond, while reliability and stability is also greatly improved [1], [2]. Next generation of particle and high harmonic beamlines require stable temporal compression of the driver pulses together with high spatio-temporal quality. Operation of the HFPW laser of the ALPS Facility of ELI ERIC has been recently demonstrated at the 700 TW level at 10 Hz repetition rate [3]. Intensity contrast and spectral stability requirements of experiments push the boundaries of currently available laser frontends. Furthermore, the high repetition rate and consequently the high average power also put a high demand on the final amplifiers, and on the vacuum compressor optical elements.