Optimization of temporal window for application of calibration free-laser induced breakdown spectroscopy (CF-LIBS) on copper alloys in air employing a single line

Mal, Eshita; Junjuri, Rajendhar; Gundawar, Manoj Kumar; Khare, Alika

doi:10.1039/c8ja00415c

Cited by 38 publications

(30 citation statements)

References 54 publications

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“…This model suggests that the general temperature decay should be exponential and should limit to a linear decrease for high temperatures or small temperature differences found. Our findings are in a good agreement with the results of Mal et al 62 Finally, Fig. 5(c) shows the evolution of Xe excited and ionized states abundances expressed as molar fractions against plasma temperature.…”

Section: Resultssupporting

confidence: 92%

ANN-LIBS analysis of mixture plasmas: detection of xenon

Saeidfirozeh

Myakalwar

Kubelík

et al. 2022

J. Anal. At. Spectrom.

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Section: Resultssupporting

confidence: 92%

ANN-LIBS analysis of mixture plasmas: detection of xenon

Saeidfirozeh

Myakalwar

Kubelík

et al. 2022

J. Anal. At. Spectrom.

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“…The electron density for the rst sample was calculated to be 2.88 AE 0.310 Â10 17 cm À3 , which is a value on par with the expected levels for a laser induced plasma. [18][19][20] The next step to dene the plasma was to calculate the plasma temperature. This can be performed by employing a Saha-Boltzmann plot, which relates the neutral and ionized peak areas to a combination of the transition parameters.…”

Section: B Saha-boltzmann Analysismentioning

confidence: 99%

Neptunium transition probabilities estimated through laser induced breakdown spectroscopy (LIBS) measurements

Andrews

Sadergaski

Myhre

2022

J. Anal. At. Spectrom.

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“…where f mn is the oscillator strength of the m-n transition (ranging from 0.42 to 0.54, Table 1.1 in literature [35]). <g > is the effective Gaunt factor (dimensionless, ~0.04, Figure 1 in literature [34]).…”

Section: Advances In High Energy Physicsmentioning

confidence: 99%

Role of Focusing Distance in Picosecond Laser-Induced Cu Plasma Spectra

Chen

Deng

et al. 2022

Advances in High Energy Physics

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To study the effects of focusing distance on the characteristics of copper plasma, a picosecond laser is utilized to ablate a pure copper plate to generate a plasma spectrum. Following numerous experiments on the subject, three significant factors are determined: lens focal length, pulse energy, and the lens-to-sample distance. These factors are employed to analyze the spectral intensity, plasma temperature, and electron density in the local thermodynamic equilibrium (LTE) and optically thin condition. Due to the shielding effects of mixed plasma, the strongest spectral intensity is achieved in the prefocused case, no matter how much beam irradiance is employed. The more intensive the beam irradiance is, the more the optimal position is distant from the focal point. The variation of plasma temperature and electron density showed a peak in the prefocused case, which is consistent with the trend of spectral intensity. For the case of extremely high irradiance (on the focus), the shielding effects become seriously, and the resultant above three factors decreased sharply. When a longer-focal-length lens is employed, the spectral intensity exhibited an obvious bimodal trend. In the prefocused case, a longer-focal-length lens is helpful to eliminate the effects of the roughness of the target surface compared with a shorter one. Finally, the assumed LTE is validated by McWhirter relation, plasma relaxation time, and diffusion length, and the optically thin condition was also validated by spectral intensity ratio. We hope that this work could be an important reference for the future design of highly optimized experiments for Calibration-Free Laser-Induced Breakdown Spectroscopy (CF-LIBS).

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Optimization of temporal window for application of calibration free-laser induced breakdown spectroscopy (CF-LIBS) on copper alloys in air employing a single line

Abstract: Optimization of temporal window for Calibration-Free Laser Induced Breakdown Spectroscopy (CF-LIBS) using single transition of the constituent elements.

Cited by 38 publications

References 54 publications

ANN-LIBS analysis of mixture plasmas: detection of xenon

ANN-LIBS analysis of mixture plasmas: detection of xenon

Neptunium transition probabilities estimated through laser induced breakdown spectroscopy (LIBS) measurements

Role of Focusing Distance in Picosecond Laser-Induced Cu Plasma Spectra

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