Effect of laser pulse energies in laser induced breakdown spectroscopy in double-pulse configuration
Authors: Benedetti P.A., Cristoforetti G., Legnaioli S., Palleschi V., Pardini L., Salvetti A., Tognoni E.
Autors Affiliation: CNR, Institute for Chemical-Physical Processes, Applied Laser Spectroscopy, Via G. Moruzzi, 1-56124 Pisa, Italy
Abstract: In this paper, the effect of laser pulse energy on double-pulse laser induced breakdown spectroscopy signal is studied. In particular, the energy of the first pulse has been changed, while the second pulse energy is held fixed. A systematic study of the laser induced breakdown spectroscopy signal dependence on the interpulse delay is performed, and the results are compared with the ones obtained with a single laser pulse of energy corresponding to the sum of the two pulses. At the same time, the crater formed at the target surface is studied by video-confocal microscopy, and the variation in crater dimensions is correlated to the enhancement of the laser induced breakdown spectroscopy signal. The results obtained are consistent with the interpretation of the double-pulse laser induced breakdown spectroscopy signal enhancement in terms of the changes in ambient gas pressure produced by the shock wave induced by the first laser pulse.
Journal/Review: SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
Volume: 60 (11) Pages from: 1392 to: 1401
KeyWords: LIBS; laser; spectroscopy; double pulse; confocal microscopyDOI: 10.1016/j.sab.2005.08.007Citations: 105data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-12-05References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here