scholarly journals Enhancement of extreme ultraviolet emission from laser irradiated targets by surface nanostructures

2017 ◽  
Vol 35 (4) ◽  
pp. 574-578 ◽  
Author(s):  
E. F. Barte ◽  
R. Lokasani ◽  
J. Proska ◽  
L. Maresova ◽  
D. Kos ◽  
...  
Keyword(s):  
Surface Layer ◽  
Laser Pulse ◽  
Conversion Efficiency ◽  
Extreme Ultraviolet ◽  
Laser Energy ◽  
Porous Alumina ◽  
Reflection Band ◽  
Ultraviolet Emission ◽  
Surface Nanostructures ◽  
Neodymium:Yttrium Aluminum Garnet Laser

AbstractThe effects of shape and thickness of a tin surface layer and of the energy of a 170 ps neodymium:yttrium-aluminum-garnet laser pulse on the conversion efficiency (CE) into extreme ultraviolet emission in the 13.5 nm region is investigated. Whereas a CE of up to 1.16% into the 2% reflection band of multilayer Mo/Si optics was measured for a bulk Sn target at a laser energy of 25 mJ, significant CE enhancement up to 1.49% is demonstrated for a 200-nm-thick Sn layer on a microstructured porous alumina substrate.

Effect of Nd:YAG Laser Energy on Multilayer Hollow Nanofiber Target's Extreme Ultraviolet Conversion Efficiency

2011 ◽  
Vol 50 (9) ◽  
pp. 1761-1770 ◽  
Author(s):  
Liqin Ge ◽  
Jianyu Ji ◽  
Lingling Bai ◽  
Teng Fei ◽  
Weichen Wang ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Nd:Yag Laser ◽  
Extreme Ultraviolet ◽  
Laser Energy ◽  
Hollow Nanofiber

scholarly journals Laser-impact-induced splashing: an analysis of the splash crown evolution after Nd:YAG ns-pulse laser impact on a liquid tin pool

2021 ◽  
Vol 127 (3) ◽  
Author(s):  
J. Hermens ◽  
H. Gelderblom ◽  
B. Liu ◽  
J. Duffhues ◽  
P. Rindt ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Extreme Ultraviolet ◽  
Laser Energy ◽  
Spot Size ◽  
Intense Laser ◽  
Expansion Velocity ◽  
Laser Fluences ◽  
Crown Width ◽  
Laser Impact ◽  
Liquid Tin

AbstractThe splash created by intense laser pulse impact onto a liquid tin layer is studied experimentally using time-delayed stroboscopic shadowgraphy. An 8-ns infrared (1064 nm) laser pulse is focused onto a deep liquid tin pool. Various laser spot sizes (70, 120, and 130 $$\upmu$$ μ m in diameter) and various laser pulse energies (ranging 2.5–30 mJ) are used, resulting in laser fluences of $$\sim$$ ∼  10–1000 J/cm$$^2$$ 2 inducing pronounced splashing. Specifically, we study the time evolution of the splash crown-width. The crown width expansion velocity is found to be linearly dependent on the laser energy, and independent of the focal spot size. A collapse of all crown width evolution data onto a single master curve confirms that the hydrodynamic evolution of our laser-impact-induced splash is equivalent to droplet-impact-induced splashing. Laser-impact splashing is particularly relevant, e.g. for high-brightness laser-assisted discharge-produced plasma and laser-produced plasma sources of extreme ultraviolet light for nanolithography.

Efficient 13.5nm extreme ultraviolet emission from Sn plasma irradiated by a long CO2 laser pulse

2008 ◽  
Vol 92 (25) ◽  
pp. 251501 ◽  
Author(s):  
Y. Tao ◽  
M. S. Tillack ◽  
K. L. Sequoia ◽  
R. A. Burdt ◽  
S. Yuspeh ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Co2 Laser ◽  
Extreme Ultraviolet ◽  
Ultraviolet Emission

Enhancement of extreme ultraviolet emission from a CO2 laser-produced Sn plasma using a cavity target

2007 ◽  
Vol 91 (23) ◽  
pp. 231501 ◽  
Author(s):  
Yoshifumi Ueno ◽  
Georg Soumagne ◽  
Akira Sumitani ◽  
Akira Endo ◽  
Takeshi Higashiguchi
Keyword(s):  
Co2 Laser ◽  
Extreme Ultraviolet ◽  
Ultraviolet Emission

Diffuse Extreme-Ultraviolet Emission from the Coma Cluster: Evidence for Rapidly Cooling Gases at Submegakelvin Temperatures

Science ◽  
1996 ◽  
Vol 274 (5291) ◽  
pp. 1335-1338 ◽  
Author(s):  
R. Lieu ◽  
J. P. D. Mittaz ◽  
S. Bowyer ◽  
J. O. Breen ◽  
F. J. Lockman ◽  
...  
Keyword(s):  
Extreme Ultraviolet ◽  
Coma Cluster ◽  
Ultraviolet Emission

scholarly journals Dependence of laser accelerated protons on laser energy following the interaction of defocused, intense laser pulses with ultra-thin targets

2011 ◽  
Vol 29 (3) ◽  
pp. 345-351 ◽  
Author(s):  
C.M. Brenner ◽  
J.S. Green ◽  
A.P.L. Robinson ◽  
D.C. Carroll ◽  
B. Dromey ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Focal Spot ◽  
Laser Pulse Energy ◽  
Laser Energy ◽  
Spot Size ◽  
Proton Flux ◽  
Focal Spot Size ◽  
Order Of Magnitude ◽  
Laser Focal Spot ◽  
Accelerated Protons

AbstractThe scaling of the flux and maximum energy of laser-driven sheath-accelerated protons has been investigated as a function of laser pulse energy in the range of 15–380 mJ at intensities of 1016–1018 W/cm2. The pulse duration and target thickness were fixed at 40 fs and 25 nm, respectively, while the laser focal spot size and drive energy were varied. Our results indicate that while the maximum proton energy is dependent on the laser energy and laser spot diameter, the proton flux is primarily related to the laser pulse energy under the conditions studied here. Our measurements show that increasing the laser energy by an order of magnitude results in a more than 500-fold increase in the observed proton flux. Whereas, an order of magnitude increase in the laser intensity generated by decreasing the laser focal spot size, at constant laser energy, gives rise to less than a tenfold increase in observed proton flux.

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