Effect of Pulse Delay Time on a Pre-Ablation Dual-Pulse LIBS Plasma

Stratis, Dimitra N.; Eland, Kristine L.; Angel, S. M.

doi:10.1366/0003702011953649

Cited by 142 publications

(79 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Some techniques have been developed to improve the LIBS sensitivity, such as oblique incidence of laser upon the surface 5 and dual-pulse excitation. 6,7 In recent years, the use of a magnetic field to confine laser-induced plasmas has attracted more and more interest. The magnetic field can be employed to better control the dynamic properties of the transient and energetic plasmas.…”

Section: Introductionmentioning

confidence: 99%

Optical emission in magnetically confined laser-induced breakdown spectroscopy

Shen¹,

Gebre³

et al. 2006

Journal of Applied Physics

View full text Add to dashboard Cite

Magnetically confined laser-induced breakdown spectroscopy was investigated by studying the optical emission from laser-induced plasma plumes expanding across an external transverse magnetic field. KrF excimer laser pulses with a pulse duration of 23 ns and a wavelength of 248 nm were used to produce plasmas from Al, Cu, and Co targets. Various optical emission lines obtained from Al and Cu targets show an obvious enhancement in the intensity of optical emission when a magnetic field of ϳ0.8 T is applied, while the optical emission lines from Co targets show a decrease in the optical emission intensity. The enhancement factors of optical emission lines were measured to be around 2 for the Al and Mn ͑impurity͒ lines from Al targets, and 6-8 for Cu lines from Cu targets. Temporal evolution of the optical emission lines from the Al samples shows a maximum enhancement in emission intensity at time delays of 8 -20 s after the incident laser pulse, while from the Cu targets it shows a continuous enhancement at time delays of 3 -20 s after the pulse. The enhancement in the optical emission from the Al and Cu plasmas was presumably due to the increase in the effective plasma density as a result of magnetic confinement. The decrease in the emission intensity from the Co plasmas was suggested to be due to the decrease of effective plasma density as a result of the magnetic force.

show abstract

Section: Introductionmentioning

confidence: 99%

Optical emission in magnetically confined laser-induced breakdown spectroscopy

Shen¹,

Gebre³

et al. 2006

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…As shown in Fig. 2, the plasma plumes are always larger and brighter in the flame, which is primarily due to the fact that the plasmas have larger expansion rate in a hotter environment [18,19]. Another factor contributed to this is the higher ablation rate caused by the higher sample temperature due to the flame heating [20,21].…”

Section: Fast Imaging and Temporally Resolved Spectroscopy Of Plasmasmentioning

confidence: 85%

Flame-enhanced laser-induced breakdown spectroscopy

Liu¹,

Li²,

He³

et al. 2014

Opt. Express

View full text Add to dashboard Cite

Liu, L.; Li, S.; He, X. N.; Huang, X.; Zhang, C. F.; Fan, L. S.; Wang, M. X.; Zhou, Y. S.; Chen, K.; Jiang, L.; Silvain, J. F.; and Lu, Yongfeng, "Flame-enhanced laser-induced breakdown spectroscopy" (2014 Abstract: Flame-enhanced laser-induced breakdown spectroscopy (LIBS) was investigated to improve the sensitivity of LIBS. It was realized by generating laser-induced plasmas in the blue outer envelope of a neutral oxy-acetylene flame. Fast imaging and temporally resolved spectroscopy of the plasmas were carried out. Enhanced intensity of up to 4 times and narrowed full width at half maximum (FWHM) down to 60% for emission lines were observed. Electron temperatures and densities were calculated to investigate the flame effects on plasma evolution. These calculated electron temperatures and densities showed that high-temperature and low-density plasmas were achieved before 4 µs in the flame environment, which has the potential to improve LIBS sensitivity and spectral resolution.

show abstract

“…In the orthogonal configuration, the second pulse does not ablate more material, but reheats the plasma and reexcites the material ablated by the first pulse. Other authors have given reasons for the signal enhancement on preheating orthogonal configurations, such as a reduction in density or pressure of the surrounding media due to the first pulse [35,[37][38][39].…”

Section: Sequences Of Pulses: Double Pulse Libsmentioning

confidence: 99%

Laser-Induced Breakdown Spectroscopy: Fundamentals, Applications, and Challenges

2012

View full text Add to dashboard Cite

Laser-induced breakdown spectroscopy (LIBS) is a technique that provides an accurate in situ quantitative chemical analysis and, thanks to the developments in new spectral processing algorithms in the last decade, has achieved a promising performance as a quantitative chemical analyzer at the atomic level. These possibilities along with the fact that little or no sample preparation is necessary have expanded the application fields of LIBS. In this paper, we review the state of the art of this technique, its fundamentals, algorithms for quantitative analysis or sample classification, future challenges, and new application fields where LIBS can solve real problems.

show abstract

Effect of Pulse Delay Time on a Pre-Ablation Dual-Pulse LIBS Plasma

Cited by 142 publications

References 27 publications

Optical emission in magnetically confined laser-induced breakdown spectroscopy

Optical emission in magnetically confined laser-induced breakdown spectroscopy

Flame-enhanced laser-induced breakdown spectroscopy

Laser-Induced Breakdown Spectroscopy: Fundamentals, Applications, and Challenges

Contact Info

Product

Resources

About