Focusing of a tabletop soft-x-ray laser beam and laser ablation
Date
1999
Authors
Vinogradov, A. V., author
Kondratenko, V. V., author
Artioukov, I. A., author
Rocca, Jorge J., author
Ozols, A., author
Benware, B. R., author
Optical Society of America, publisher
Journal Title
Journal ISSN
Volume Title
Abstract
We focused the beam of a high-repetition-rate capillary-discharge tabletop laser operating at a wavelength of 46.9 nm, using a spherical Si/Sc multilayer mirror. The energy densities significantly exceeded the thresholds for the ablation of metals. Single-shot laser ablation patterns were used in combination with ray-tracing computations to characterize the focused beam. The radiation intensity within the 2-μm-diameter central region of the focal spot was estimated to be ≈1011 W/cm2, with a corresponding energy density of ~100 J/cm2.