Effect of laser pulse energies in laser induced breakdown spectroscopy in double-pulse configuration

Anno: 2005

Autori: Benedetti P.A., Cristoforetti G., Legnaioli S., Palleschi V., Pardini L., Salvetti A., Tognoni E.

Affiliazione autori: 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.

Giornale/Rivista: SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY

Volume: 60 (11)      Da Pagina: 1392  A: 1401

Parole chiavi: LIBS; laser; spectroscopy; double pulse; confocal microscopy
DOI: 10.1016/j.sab.2005.08.007

Citazioni: 114
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-19
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