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Opacity effects on extreme ultraviolet (EUV) emission from laser-produced tin (Sn) plasma have been experimentally investigated. An absorption spectrum of a uniform Sn plasma generated by thermal x rays has been measured in the EUV range (9-19 nm wavelength) for the first time. Experimental results indicate that control of the optical depth of the laser-produced Sn plasma is essential for obtaining high conversion to 13.5 nm-wavelength EUV radiation; 1.8% of the conversion efficiency was attained with the use of 2.2 ns laser pulses.
Digital Object Identifer:10.1103/PhysRevLett.95.235004
Published with permission from the copyright holder. This is the institute's copy, as published in Physical Review Letters, November 2005, Volume 95, Issue 23, Pages 4.
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Physical Review Letters
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