Commissioning Experiment On Laser-Plasma Electron Acceleration In Supersonic Gas Jet At Cetal-Pw Laser Facility

CETAL-PW high power laser facility reports first accelerated electron beams with maximum energies up to similar to 500 MeV obtained in Romania, by focusing ultra-short laser pulses of 35 fs with energies up to 5 J before compression on supersonic gas jets of low-density He 99% - N-2 1% mixture. The conditions for generation of stable electron beams (root mean square (rms) pointing stability of about 5 mrad), with different types of spectral characteristics and average maximum electron energies between 180 MeV and 380 MeV are presented. Maximum energies for all accelerated electron spectra are well described by theoretical estimations.