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Basic mechanisms of signal enhancement in ns double-pulse laser-induced breakdown spectroscopy in a gas environment

  Articoli su Riviste JCR/ISI  (anno 2014)

Autori:  Tognoni E., Cristoforetti G

Affiliazione Autori:  National Institute of Optics of the National Research Council (INO-CNR), Via G. Moruzzi 1, 56124 Pisa, Italy

Riassunto:  Understanding the mechanisms of the signal enhancement in double-pulse laser-induced breakdown spectroscopy is highly desirable. it is evident, however, that it is not possible to fit a unique general model to the observations obtained in collinear or in orthogonal geometries, in pre-spark or in re-heating schemes, using ns or fs pulses, in a gas or liquid environment. We believe, instead, that by considering separately the specific experimental cases (for example: a given irradiation geometry, a given pulse timing, etc.) the comprehension of the processes occurring during double-pulse experiments might become easier. We focus on one specific experimental case, namely ns double-pulse irradiation of solid targets in a gaseous environment, and classify the experiments according to the irradiation mode (orthogonal pre-spark, collinear and orthogonal re-heating). Then, we propose a description of the processes occurring in the different cases, on the basis of data and interpretations that are available in the literature.

Volume n.:  29 (8)      Pagine da: 1318  a: 1338
DOI: 10.1039/c4ja00033a

*Impact Factor della Rivista: (2014) 3.466   *Citazioni: 40
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  14/07/2019

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