A high repetition rate X-ray source for preionization of high-pressure self sustained laser discharges has been studied. Use has been made of a corona plasma cathode and a water cooled reflective target. A dosage of 18mRad per pulse and per joule of input energy at a repetition rate of 300Hz continuously and 1kHz burst could be obtained. A rise time of the X-ray power of 13ns has been observed.
Frederik A. van Goor,
"High-repetition-rate x-ray preionization source", Proc. SPIE 1397, 8th Intl Symp on Gas Flow and Chemical Lasers, (1 February 1991); doi: 10.1117/12.25921; https://doi.org/10.1117/12.25921