Fg. Tomasel et al., DYNAMICS OF THE PLASMA-COLUMN OF A CAPILLARY DISCHARGE SOFT-X-RAY LASER, IEEE transactions on plasma science, 24(1), 1996, pp. 49-50
A sequence of time-resolved soft X-ray pinhole images shows the rapid
plasma compression in a fast high-power capillary discharge, The compr
essed plasma column has a length-to-diameter ratio > 500 and a good ax
ial uniformity, characteristics that have allowed for the first demons
tration of large soft X-ray amplification in a discharge-created plasm
a.