Crater drilling enhancement obtained in parallel non-collinear double-pulse laser ablation
Authors: Cristoforetti G., Legnaioli S., Palleschi V., Tognoni E., Benedetti P.A.
Autors Affiliation: Applied Laser Spectroscopy Laboratory, Institute for Chemical-Physical Processes, Research Area of National Research Council, Via G. Moruzzi, 1, 56124 Pisa, Italy
Abstract: In order to investigate the double-pulse ablation mechanism, two parallel but non-collinear laser beams, delayed with respect to each other by 1 mu s, were focussed on an aluminium sample, so that a lateral distance of 600 microns exists between the centres of the two craters and no superposition of the laser-ablation zones is present. The use of such configuration results in a signal and in a plasma mass enhancement with respect to the single-pulse case almost equal to that obtained in the double-pulse collinear case. However, such a non-collinear geometry evidences a much more effective drilling of the surface. Such unexpected drilling seems to be related to a hydrodynamic drainage out of aerosol and molten material, hindering its re-deposition in and around the crater.
Journal/Review: APPLIED PHYSICS. A, MATERIALS SCIENCE & PROCESSING (PRINT)
Volume: 98 (1) Pages from: 219 to: 225
KeyWords: Laser Ablation; Double Pulse; DOI: 10.1007/s00339-009-5379-8Citations: 12data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2020-02-23References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here