Influence of the chirp and repetition rate of ultrashort laser pulses on the Kα yield from laser-produced plasmas

In the present work the hard X-ray yield is measured while varying the chirp of irradiating laser pulse. The radiation of a Ti:sapphire CPA laser system (29 fs, 750 μJ, 1 kHz) is focussed onto an iron containing solid state target producing Bremsstrahlung as well as target-specific K
_α
and K
_β
lines. The hard X-ray yield has been optimized by introducing negative and positive group delay dispersion (GDD) and third order dispersion (TOD) to the femtosecond laser pulse.