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An intensified charge-coupled device (CCD)-array camera system coupled to a tunable (400 to 720 nm) narrow-band (full width at half maximum, 5 nm) liquid-crystal filter was used for species-resolved spectroscopic imaging. The ability to study simultaneously both fast- and slow-moving components of the ablation plume results from the extreme (photon counting) sensitivity of the intensified CGD-array camera system and its ability to collect photons from all wavelengths simultaneously. Slow-moving or scattered components of the laser-sputtered flux (such as redeposited material near the target) are not overlooked. For details and other examples of gated, species-resolved imaging, see (4) and D. B. Geohegan and A. A. Puretzky, Mater. Res. Soc. Symp. Proc., in press.
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This research was carried out at Oak Ridge National Laboratory (ORNL), managed by Lockheed Martin Energy Research Corporation for the U.S. Department of Energy under contract DE-AC05-96OR22464. C.M.R. was supported by an appointment to the ORNL Postdoctoral Research Associates Program administered jointly by ORNL and the Oak Ridge Institute for Science and Education.
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