Inner-shell photo-ionisation x-ray lasing
1 LULI, École Polytechnique, CNRS, CEA, UPMC, 91128 Palaiseau, France
2 CEA, DAM-DIF, 91297 Arpajon, France
3 CEA, DAM-Gramat, 46500 Gramat, France
4 LOA, ENSTA Paris Tech, École Polytechnique, CNRS, Chemin de la Hunière, 91761 Palaiseau, France
In this paper, we study the possibility to produce femtosecond monochromatic coherent (“x-ray laser”) pulses in the keV range from inner-shell photo-ionisation of a gaseous medium by a laser-driven betatron pump source. A collisional-radiative model and a radiative transfer post-processor have been built to determine the lasing plasma kinetics, assess the local gain coefficient along the Kα transition in the ASE regime, and finally compute the x-ray laser intensity at saturation, to infer the key parameters for an experimental demonstration.
© Owned by the authors, published by EDP Sciences, 2011