Effect of sample temperature on laser-induced breakdown spectroscopy

Tavassoli, Seyed Hassan; Gragossian, Aram

doi:10.1016/j.optlastec.2008.07.010

Cited by 63 publications

(33 citation statements)

References 12 publications

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“…This is because large part of the incident laser energy would be dissipated in the plasma layer near the target surface when optical breakdown is intrigued by very high power density laser [8][9][10]. As a matter of fact, the threshold of such optical breakdown has been theoretically predicted well for clean air and experimentally obtained for classical target materials [11][12][13]. However, no direct reference data in relevance to optical breakdown has been reported for CFRP composites according to our knowledge.…”

Section: Introductionmentioning

confidence: 99%

Ablation behaviors of carbon reinforced polymer composites by laser of different operation modes

Huang

2015

Optics & Laser Technology

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a b s t r a c tLaser ablation mechanism of Carbon Fiber Reinforced Polymer (CFRP) composite is of critical meaning for the laser machining process. The ablation behaviors are investigated on the CFRP laminates subject to continuous wave, long duration pulsed wave and short duration pulsed wave lasers. Distinctive ablation phenomena have been observed and the effects of laser operation modes are discussed. The typical temperature patterns resulted from laser irradiation are computed by finite element analysis and thereby the different ablation mechanisms are interpreted.

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Section: Introductionmentioning

confidence: 99%

Ablation behaviors of carbon reinforced polymer composites by laser of different operation modes

Huang

2015

Optics & Laser Technology

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“…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]. The Al atomic lines in the spectral range of 388 ~400 nm and Al ionic lines in the spectral range of 462 ~470 nm were measured to investigate the flame effects on these emission lines.…”

Section: Fast Imaging and Temporally Resolved Spectroscopy Of Plasmasmentioning

confidence: 99%

“…A minor factor is the larger ablation rate caused by the higher sample temperature due to the flame heating [19][20][21]. The shorter plasma lifetime is caused by the enhancement of energy transfer due to the increased collision among particles with the presence of the flame [22,23].…”

Section: Fast Imaging and Temporally Resolved Spectroscopy Of Plasmasmentioning

confidence: 99%

Flame-enhanced laser-induced breakdown spectroscopy

Liu¹,

Li²,

He³

et al. 2014

Opt. Express

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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.

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“…The elemental composition of sample can be easily determined by spectral analysis of plasma emission. LIBS has been applied extensively for analysis of different materials down to trace concentrations [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Repeatability improvement of laser-induced breakdown spectroscopy using an auto-focus system

2015

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Laser-induced breakdown spectroscopy (LIBS) is a novel technique for elemental analysis of materials. The repeatability of LIBS results is an important issue in many applications. Many factors influence the repeatability of LIBS results. The aim of this study is to examine the effect of laser beam focusing position or lens to sample distance (LTSD) as one of the most important factors influencing LIBS spectra. A point auto-focus system is designed and applied to provide the same lens to sample distance in every LIBS experiment. This system is employed and the result is compared to that of non-auto-focus technique on samples with different degrees of evenness such as aluminum, paper, tape and human fingernail. The standard deviation of this experiment is measured in the range of 4 to 26 μm. Then, spectrum's repeatability is examined with two samples of aluminum and human fingernail. The standard deviation of spectra is considerably reduced. In conclusion, repeatability of LIBS results could be optimized by using the auto-focus system.

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Effect of sample temperature on laser-induced breakdown spectroscopy

Cited by 63 publications

References 12 publications

Ablation behaviors of carbon reinforced polymer composites by laser of different operation modes

Ablation behaviors of carbon reinforced polymer composites by laser of different operation modes

Flame-enhanced laser-induced breakdown spectroscopy

Repeatability improvement of laser-induced breakdown spectroscopy using an auto-focus system

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