Toward 100Hz Joule Class Ultra-Short Pulses TiSa Laser

Acceleration experiments have been performed at limited repetition rate ranging from 1 Hz for PetaWatt class lasers to 10 Hz for 100 TeraWatt class lasers [1]. Higher repetition rate is required to generate the particle or radiation flux necessary for applications in different fields of industry and medicine. In this goal, we report on the way to amplify laser light in TiSa at average power levels exceeding 100 Watts while managing the induced thermal issues. Compression of those pulses under vacuum presents also a challenge in order to manage the heat load in the gratings and prevent degradation of the wavefront due to thermal deformation.