Influence of laser-produced plasma parameters on the deposition process: in situ space- and time-resolved optical emission spectroscopy and fractal modeling approach

Irimiciuc, Ștefan Andrei; Bulai, Georgiana; Agop, Maricel; Gurlui, Silviu

doi:10.1007/s00339-018-2035-1

Cited by 24 publications

(50 citation statements)

References 31 publications

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“…In literature this structure is attributed to the presence of clusters, nanoparticles or molecules and it has its origin in the Knudsen layer which is usually characterized by black body radiation [35][36][37]. The structures observed in this study can be compared to the structures observed in ablation on Ni, Al, stainless-steel [28,29] or more complex targets like GeSe chalcogenide glasses [30].…”

Section: Iccd Fast Camera Imagingmentioning

confidence: 75%

“…Optical emission spectroscopy analysis was performed using the experimental set up described in [28,29]. The second harmonic with λ = 532 nm of a 10 ns Nd: YAG pulsed laser beam (Brilliant EaZy) was focused by a f = 40 cm lens on the samples.…”

Section: Characterization Methodsmentioning

confidence: 99%

“…structures observed in ablation on Ni, Al, stainless-steel [28,29] or more complex targets like GeSe chalcogenide glasses [30].…”

Section: Iccd Fast Camera Imagingmentioning

confidence: 99%

“…Since in these conditions the non-differentiability (fractality) appears as a fundamental property of the ablation plasma dynamics it seems necessary to construct a corresponding non-differentiable plasma physics model, for example in the form of fractal hydrodynamics model [46]. The mathematics behind this model as well as some applications of the model were development in a systematic manner by our group in [28,29,46,47]. In the following, a fractal analysis will prove a multi-structuring of the ablation plasma in the form of Coulomb, thermal and cluster structures.…”

Section: Fractal Analysismentioning

confidence: 99%

“…where summation over the repeated indices is understood. Using Equations (28) and (29), the tensor C αβ is:…”

Section: Group Invariance Analysismentioning

confidence: 99%

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Investigations of Laser Produced Plasmas Generated by Laser Ablation on Geomaterials. Experimental and Theoretical Aspects

et al. 2019

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Several surface investigation techniques, such as X-ray diffraction (XRD), EDX, and optical microscopy, were employed in order to describe the mineral contents in several geomaterials. Space and time resolved optical emission spectroscopy was implemented to analyze the plasma generated by the laser–geomaterial interaction. The values of the plasma parameters (velocity and temperature) were discussed with respect to the nature of the minerals composing the geomaterials and the morphological structure of the samples. Correlations were found between the excitation temperatures of the atomic and ionic species of the plasmas and the presence of calcite in the samples. A mathematical model was built to describe the dynamics in ablation plasma using various mathematical operational procedures: multi structuring of the ablation plasma by means of the fractal analysis and synchronizations of the ablation plasma entities through SL (2R) type group invariance and in a particular case, through self-modulation in the form of Stoler type transformations. Since Stoler type transformations are implied in general, in the charge creation and annihilation processes, then the SL (2R) type group invariance become fundamental in the description of ablation plasma dynamics.

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