Studies of Neutral and Ion Transport during Laser Ablation of 1:2:3 Superconductors by Optical Absorption Spectroscopy
Transient optical absorption spectroscopy, a new diagnostic technique for examining the density of ground state neutrals and ions following laser ablation, has been utilized for the first time to study the transport of ground state Y, Ba, Cu, Y+ and Ba+ following laser ablation of Y1Ba2Cu3Ox pellets under film deposition conditions. The technique reveals significantly broadened velocity distributions with a low velocity component which is not observed in velocity distributions inferred from monitoring excited state plume fluorescence. Ion probe measurements confirm this low velocity component. High resolution emission spectroscopy is also utilized to examine the spectral broadening arising from collision processes in the laser plasma as well as obtain estimates of plasma densities.
KeywordsLaser Ablation Laser Plasma Knudsen Layer Optical Absorption Spectroscopy Laser Ablation Process
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