Abstract
A calculation of the modal photon densities and gain in a resonantly photopumped X-ray laser is presented. The one-dimensional Lagrangian hydrodynamics code MED103 is used to simulate the laser irradiation of planar Potassium and Chlorine targets. A line transfer algorithm is used to calculate the modal photon density of the Hydrogen-like Ly- α emission from the Potassium plasma taking into account the gradients in density, temperature and velocity. The relative position of the chlorine and potassium targets is chosen to optimise the pumping whilst maintaining a realistic experimental geometry. The steady-state zero-dimensional code Galaxy is then used to calculate the gain at the peak of the laser pulses on the 4f 7/2→3d 5/2 X-ray lasing transition (64.8 Å) in hydrogenic chlorine as well as other possible lasing transitions. A comparison is also made with a back-to-back target geometry which has been used in previous experiments.
Published Version
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