Advances in High Average Power, 100 Hz Repetition Rate Table-Top Soft X-Ray Lasers

被引:1
作者
Reagan, Brendan A. [1 ,2 ]
Baumgarten, Cory [1 ,3 ]
Berrill, Mark [1 ,2 ]
Wernsing, Keith A. [1 ,2 ]
Woolston, Mark [1 ,2 ]
Urbanski, Lukasz [1 ,2 ]
Li, Wei [1 ,2 ]
Marconi, Mario C. [1 ,2 ]
Slyaptsev, Vyacheslav N. [2 ]
Menoni, Carmen S. [1 ,2 ]
Rocca, Jorge J. [1 ,2 ,3 ]
机构
[1] NSF ERC Extreme Ultraviolet Sci & Technol, Ft Collins, CO USA
[2] Colorado State Univ, Dept Elect & Comp Engn, Ft Collins, CO 80523 USA
[3] Colorado State Univ, Dept Phys, Ft Collins, CO 80523 USA
来源
X-RAY LASERS 2014 | 2016年 / 169卷
关键词
FREE-ELECTRON LASER; EXTREME-ULTRAVIOLET; NM; PULSES; BEAM; GENERATION; OPERATION; LONG;
D O I
10.1007/978-3-319-19521-6_2
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
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 lambda = 18.9 nm, 0.1mW at lambda = 13.9 nm, and 20 mu W at lambda = 11.9 nm. These lasers are driven by a compact chirped pulse amplification laser system featuring diode-pumped, cryogenically-cooled 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 lambda = 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 lambda = 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.
引用
收藏
页码:11 / 19
页数:9
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