Multi-pulse laser-induced breakdown spectroscopy (LIBS) in the collinear pulse configuration with time-integrating detection was performed on metallic samples in ambient air in an effort to clarify the contributing processes responsible for the signal enhancement observed in comparison with single-pulse excitation. Complementary experiments were also carried out on another LIBS setup using detection by an imaging spectrograph with high time resolution. The effects of laser bursts consisting of up to seven ns-range pulses from Nd-doped solid-state lasers operating at their fundamental wavelength and separated by 8.5–50 μs time gaps was studied. The ablation and emission characteristics of the generated plasmas were investigated using light profilometry, microscopy, plasma imaging, emission distribution mapping, time-resolved line emission monitoring, and plasma temperature calculations. The experimental data suggest that the two contributing processes mainly responsible for the signal enhancement effect are the plume reheating caused by the sequential laser pulses and, more dominantly, the increased material ablation attributed to the lower breakdown threshold for the preheated (molten) sample surface and/or the reduced background gas pressure behind the shockwave of preceding pulses.
CremersD. A. and RadziemskiL. J, Handbook of Laser-Induced Breakdown Spectroscopy (John Wiley and Sons, New York, 2006).
2.
MiziolekA. W.PalleschiV. and SchechterI, Eds., Laser-Induced Breakdown Spectroscopy: Fundamentals and Applications (Cambridge University Press, New York, 2006).
3.
SinghJ. P. and ThakurS. N, Eds., Laser-Induced Breakdown Spectroscopy (Elsevier, New York, 2007).
4.
YuehF. Y.SinghJ. P. and ZhangH, “Laser-Induced Breakdown Spectroscopy, Elemental Analysis”, in Encyclopedia of Analytical Chemistry, MeyersR. A., Ed. (John Wiley and Sons, New York, 2000), p. 2066.
5.
PasquiniC.CortezJ.SilvaL. M. C. and GonzagaF. B, J. Braz. Chem. Soc.18, 463 (2007).
6.
TognoniE.PalleschiV.CorsiM. and ChristoforettiG, Spectrochim. Acta, Part B57, 1115 (2002).
7.
LeeW. B.WuJ.LeeY. I. and SneddonJ, Appl. Spectrosc. Rev.39, 27 (2004).
8.
CremersD. A.RadziemskiL. J. and LoreeT. R, Appl. Spectrosc.38, 721 (1984).
9.
BabushokV. I.DeLuciaF. C.Jr.GottfriedJ. L.MunsonC. A. and MiziolekA. W, Spectrochim. Acta, Part B61, 999 (2006).
10.
ScaffidiJ.AngelS. M. and CremersD. A, Anal. Chem.78, 24 (2006).
11.
NollR.SattmannR.SturmV. and WinkelmannS, J. Anal. At. Spectrom.19, 419 (2004).
12.
BenedettiP. A.ChristoforettiG.LegnaioliS.PalleschiV.PardiniL.SalvettiA. and TognoniE, Spectrochim. Acta, Part B60, 1392 (2005).
13.
GautierC.FichetP.MenutD.LacourJ-L.L'HermiteD. and DubessyJ, Spectrochim. Acta, Part B60, 792 (2005).
14.
ColaoF.LazicV.FantoniR. and PershinS, Spectrochim. Acta, Part B57, 1167 (2002).
15.
MaoX.ZengX.WenS.-B. and RussoR. E, Spectrochim. Acta, Part B60, 960 (2005).
16.
GehlenC. D.RothP.AydinÜ.WiensE. and NollR, Spectrochim. Acta, Part B63, 1072 (2008).
17.
BogaertsA.ChenZ. and AutriqueD, Spectrochim. Acta, Part B63, 746 (2008).
18.
PiepmeierE. H. and MalmstadtH. V, Anal. Chem.41, 700 (1969).
19.
ScottR. H. and StrasheimA, Spectrochim. Acta, Part B26, 707 (1971).
20.
SattmannR.SturmV. and NollR, J. Phys. D, Appl. Phys.28, 2181 (1995).
21.
SturmV.PeterL. and NollR, Appl. Spectrosc.54, 1275 (2000).
22.
LöbeA.VrenegorJ.FleigeR.SturmV. and NollR, Anal. Bioanal. Chem.385, 326 (2006).
23.
HartmannC.GillnerA.AydinÜ.NollR.FehrT.GehlenC. and PopraweR, J. Phys., Conf. Series59, 440 (2007).
24.
GalbácsG.BudaváriV. and GeretovszkyZs, J. Anal. At. Spectrom.20, 974 (2005).
25.
GalbácsG.JedlinszkiN.CsehG.GalbácsZ. and TúriL, Spectrochim. Acta, Part B63, 591 (2008).
26.
MultariR. A.FosterL. E.CremersD. A. and FerrisM. J, Appl. Spectrosc.50, 1483 (1996).
27.
LeeY. I.SongK.ChaH.LeeJ. M.ParkM. C.LeeG. H. and SneddonJ, Appl. Spectrosc.51, 959 (1997).
28.
MüllerM.GornushkinI. B.FlorekS.MorD. and PanneU, Anal. Chem.79, 4419 (2007).
29.
ChristoforettiG.LegnaioliS.PalleschiV.SalvettiA.TognoniE.BenedettiP. A.BrioschiF. and FerrarioF, J. Anal. At. Spectrom.21, 697 (2006).
30.
Lopez-MorenoC.Amponsah-ManagerK.SmithB. W.GornushkinI. B.OmenettoN.PalancoS.LasernaJ. J. and WinefordnerJ. D, J. Anal. At. Spectrom.20, 552 (2005).
31.
GornushkinI. B.Amponsah-ManagerK.SmithB. W.OmenettoN. and WinefordnerJ. D, Appl. Spectrosc.58, 762 (2004).
32.
FreedmanA.IannarilliF. J.Jr., and WormhoudtJ. C., Spectrochim. Acta, Part B60, 1076 (2005).
33.
GautierC.FichetP.MenutD. and DubessyJ, Spectrochim. Acta, Part B61, 210 (2006).
34.
StratisD. N.ElandK. L. and AngelS. M, Appl. Spectrosc.54, 1719 (2000).
35.
StratisD. N.ElandK. L. and AngelS. M, Appl. Spectrosc.54, 1270 (2000).
36.
TavassoliS. H. and GragossianA, Opt. Laser Technol.41, 481 (2009).
37.
ScaffidiJ.PearmanW.CarterJ. C.ColstonB. W. and AngelS. M, Appl. Opt.43, 2786 (2004).
38.
ChunF. S.SiminF.SinghJ. P.YuehF. Y.RigsbyJ. T.MontsD. L. and CookR. L, Glass Technol.41, 16 (2000).
39.
BleinerD.ChenZ.AutriqueD. and BogaertsA, J. Anal. At. Spectrom.21, 910 (2006).
40.
CorsiM.CristoforettiG.GiuffridaM.HidalgoM.LegnaioliS.PalleschiV.SalvettiA.TognoniE. and VallebonaC, Spectrochim. Acta, Part B59, 723 (2004).
41.
St-OngeL.DetalleV. and SabsabiM, Spectrochim. Acta, Part B57, 121 (2002).
42.
AragonC. and AguilerJ. A, Appl. Spectrosc.51, 1632 (1997).
43.
GautierC.FichetP.MenutD. and DubessyJ, Spectrochim. Acta, Part B61, 210 (2006).
44.
De GiacomoA.Dell'AglioM.BrunoD.GaudiusoR. and De PascaleO, Spectrochim. Acta, Part B63, 805 (2008).
45.
MatsutaH. and WagatsumaK, Appl. Spectrosc.56, 1165 (2002).
46.
NaeemT. M.MatsutaH. and WagatsumaK, Spectrochim. Acta, Part B58, 891 (2003).
47.
NakamuraS. and WagatsumaK, Spectrochim. Acta, Part B62, 1303 (2007).
48.
BenedettiP. A.CristoforettiG.LegnaioliS.PalleschiV.PardiniL.SalvettiA. and TognoniE, Spectrochim. Acta, Part B60, 1392 (2005).
49.
ChristoforettiG.LeonaioliS.PalleschiV.SalvettiA. and TognoniE, Appl. Phys. B80, 559 (2005).
50.
St-OngeL.SabsabiM. and CieloP, Spectrochim. Acta, Part B53, 407 (1998).
51.
SalléB.CremersD. A.MauriceS. and WiensR. C, Spectrochim. Acta, Part B60, 479 (2005).
52.
RaiV. N.YuehF. Y. and SinghJ. P, Appl. Opt.47, G30 (2008).
53.
LaulyB., Ph.D. Dissertation, University of Florida, Gainesville (2008).
