@inproceedings{dd8a49adb1af465988a512dfb4b91230,
title = "Advances in high average power, 100 Hz repetition rate table-top soft X-ray lasers",
abstract = "We discuss new results of the demonstration of 100 Hz table-top soft x-ray lasers operating at wavelengths from 10.9 nm to 18.9 nm and report the highest soft x-ray laser average power to date at sub-20 nm wavelength. The results include the generation of average powers up to 0.2mW at λ =18.9 nm, 0.1mW at λ =13.9 nm, and 20 μW at λ =11.9 nm. These lasers are driven by a compact chirped pulse amplification laser system featuring diode-pumped, cryogenicallycooled Yb:YAG power amplifiers that produces 1 J pulses of 5 ps FWHM duration at 100 Hz repetition rate. The driver laser pulse shape was tailored to more efficiently pump soft x-ray plasma amplifiers operating at sub-15 nm wavelengths leading to a threefold increase in the λ =13.9 nm laser pulse energy and lasing down to 10.9 nm. The pump pulse profile consisting of a nanosecond ramp followed by two closely spaced peaks of picosecond duration, is shown to create a plasma with an increased density of Ni-like lasing ions at the time of peak temperature, resulting in a larger gain coefficient over a temporally and spatially enlarged space. The development of rotating solid targets with high shot capacity has allowed the uninterrupted operation of the λ =18.9 nm soft x-ray laser for hundreds of thousands of consecutive shots making it suitable for applications in nanoscience and nanotechnology that require high photon flux at short wavelengths. As a proof-of-principle demonstration of the utility of this laser in such applications we have lithographically printed an array of nanometer-scale features through coherent Talbot self imaging. These results open the path to milliwatt average power table-top soft x-ray lasers.",
author = "Reagan, {Brendan A.} and Cory Baumgarten and Mark Berrill and Wernsing, {Keith A.} and Mark Woolston and Lukasz Urbanski and Wei Li and Marconi, {Mario C.} and Slyaptsev, {Vyacheslav N.} and Menoni, {Carmen S.} and Rocca, {Jorge J.}",
note = "Publisher Copyright: {\textcopyright} Springer International Publishing Switzerland 2016.; 14th International Conference on X-Ray Lasers, 2014 ; Conference date: 26-05-2014 Through 30-05-2014",
year = "2016",
doi = "10.1007/978-3-319-19521-6_2",
language = "English",
isbn = "9783319195209",
series = "Springer Proceedings in Physics",
publisher = "Springer Science and Business Media, LLC",
pages = "11--19",
editor = "Jorge Rocca and Carmen Menoni and Mario Marconi",
booktitle = "X-Ray Lasers 2014 - Proceedings of the 14th International Conference on X-Ray Lasers",
}