Review of X-ray laser research at CEL-V

Plasmas generated by laser irradiation of solid targets have demonstrated for a long time their non LTE behavior providing numerous states propitious to population inversions. So studying inversions and X-ray amplification is in keeping with the general pattern of the understanding of the plasma state and more precisely of the involved atomic processes. Moreover the recent fruitful experiments on X-ray amplification have enforced our interest, if it was not, in theoretical and experimental studies in this new field of investigation