Extreme ultraviolet (XUV) radiation from 100 to less than 30 nm is emitted from a laser-induced plasma generated on a liquid-mercury surface. This surface does not degrade even after tens of thousands of laser pulses. The 532-nm laser light focused on the mercury forms a bright plasma core and a plume extending several millimeters above the liquid level. The plasma core produces primarily continuum radiation, whereas the plume emits lines at wavelengths above 77 nm. The mercury plasma was generated at the entrance port of a normal incidence vacuum monochromator, and the dispersed XUV radiation was monitored with a photomultiplier tube. The recent discovery of continuum emission from laser-generated plasmas on rare-earth foils has created renewed interest in the use of laser-generated plasmas as sources of extreme ultraviolet (XUV) radiation. 1- 3 A typical apparatus uses a pulsed laser of moderate power, a foil mounted on a translation stage in a vacuum, and a device to measure the output. Provision must be made for translation or replacement of the foil since the laser shots degrade the target and each sho
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