New method of traveling wave generation and characterization for use on x-ray laser transient pumping experiments

摘要

We give here a general description of a traveling wave excitation method based on the use of a femtosecond Inhomogeneous Pulse (IP) for transverse pumping of laser media using the parallel grating compressor of a CPA laser chain. We show that the only requirement is to slightly tilt and translate one of the grating from its original position. Expressions of this two motions are derived allowing an easy reconfiguration of any CPA chain. Experimental validation is performed in the framework of transient collisional excitation pumping of x-ray laser.