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6 Feb 2006

Volume 88, Issue 6, Articles (06xxxx)

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Appl. Phys. Lett. 88, 063509 (2006); http://dx.doi.org/10.1063/1.2171834 (3 pages)

M. Feng, N. Holonyak, R. Chan, A. James, and G. Walter
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Titanium plasma source for capillary discharge extreme ultraviolet lasers

M. Shuker, A. Ben-kish, A. Fisher, and A. Ron

Appl. Phys. Lett. 88, 061501 (2006); http://dx.doi.org/10.1063/1.2172298 (3 pages) | Cited 4 times

Online Publication Date: 9 February 2006

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A technique to generate jets of pure Titanium plasma is presented. A Ti wire is exploded in an Alumina capillary sealed with 1 atm. of air inside. The generated plasma emerges from the capillary (to a high-vacuum environment) by ripping a thin Ti foil that seals one of the capillary ends. The generated plasma jets have a velocity of up to 4.5±0.5 mm/μs, an electron temperature of 1.5±0.5 eV and an ion density of 2.7±1×1017/cc. The plasma source was designed for a capillary discharge extreme ultraviolet laser experiment, but might also be useful to other application such as a target for Z-pinch experiments.
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52.50.Dg Plasma sources
52.50.Lp Plasma production and heating by shock waves and compression
52.80.Qj Explosions; exploding wires
52.25.-b Plasma properties

Laser-induced shockwave propagation from ablation in a cavity

Xianzhong Zeng, Xianglei Mao, Samuel S. Mao, Sy-Bor Wen, Ralph Greif, and Richard E. Russo

Appl. Phys. Lett. 88, 061502 (2006); http://dx.doi.org/10.1063/1.2172738 (3 pages) | Cited 20 times

Online Publication Date: 10 February 2006

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The propagation of laser-induced shockwaves from ablation inside of cavities was determined from time-resolved shadowgraph images. The temperature and electron number density of the laser-induced plasma was determined from spectroscopic measurements. These properties were compared to those for laser ablation on the flat surface under the same energy and background gas condition. A theoretical model was proposed to determine the amount of energy and vaporized mass stored in the vapor plume based on these measurements.
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52.38.Mf Laser ablation
52.38.Dx Laser light absorption in plasmas (collisional, parametric, etc.)
52.35.Tc Shock waves and discontinuities
52.70.Kz Optical (ultraviolet, visible, infrared) measurements
52.25.Os Emission, absorption, and scattering of electromagnetic radiation
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