Dynamics of the plume produced by nanosecond ultraviolet laser ablation of metals
Open Access
- 4 March 2003
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 67 (10), 104101
- https://doi.org/10.1103/physrevb.67.104101
Abstract
The dynamics of the ablation plume of a partially ionized plasma produced by a nanosecond UV laser with different irradiation spot geometries has been explored. We have used an ensemble of quartz crystal microbalances to make the first systematic and quantitative study of how the shape of the plume varies as the aspect ratio of the elliptical laser spot is varied by about a factor of ten. The flip-over effect can be described by the adiabatic expansion model of Anisimov et al. using a value of the adiabatic constant of about We have also studied the forward peaking of the ablation plume for a large number of metals at the same laser fluence. Contrary to earlier reports, we find that the more refractory metals have the broader angular distributions.
Keywords
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