Laser ablation efficiency of metal samples with UV laser nanosecond pulses

Sallé, B.; Chaleard, Catherine; Detalle, Vincent; Lacour, Jean-Luc; Mauchien, P.; Nouvellon, C.; Semerok, A.

doi:10.1016/s0169-4332(98)00495-4

Cited by 43 publications

(29 citation statements)

References 7 publications

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“…Interestingly, these expressions can be scaled down to the irradiances normally used in LIBS work (~10 9 W cm -2 ) and are therefore directly applicable here. Indeed, the same expressions have been reported in laser microanalysis by Sappey 70 Such extrapolations must therefore be considered with caution when different laser systems are involved.…”

Section: Characterization Of the Laser Parameters And The Ablation Prsupporting

confidence: 64%

“…The decrease of the ablation efficiency at high fluences in the blow-off case is attributed to the energy being wasted in overheating the superficial layers of the tissue sample. 46 The above terminology, including terms such as ''ablation rate'', ''ablation yield'', and ''ablation efficiency'', have been addressed in a number of papers using different types of lasers and different pulse durations (fs-ps-ns), more specifically related to LIBS or to laserablation inductively coupled plasma optical emission spectroscopy (LA-ICP-OES) and/or LA-ICP-MS. [70][71][72][73][74][75][76][77][78] For example, Sallé et al 70 defined the ablation efficiency as the ratio of the volume of matter ablated (cm 3 ) to the laser pulse energy (J), while Semerok et al 72 referred to it as the ratio of the crater depth (cm) to the laser fluence (J/ cm 2 ). These definitions can be simply expressed by Eqs.…”

Section: Characterization Of the Laser Parameters And The Ablation Prmentioning

confidence: 99%

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Laser-Induced Breakdown Spectroscopy (LIBS), Part I: Review of Basic Diagnostics and Plasma—Particle Interactions: Still-Challenging Issues within the Analytical Plasma Community

2010

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Laser-induced breakdown spectroscopy (LIBS) has become a very popular analytical method in the last decade in view of some of its unique features such as applicability to any type of sample, practically no sample preparation, remote sensing capability, and speed of analysis. The technique has a remarkably wide applicability in many fields, and the number of applications is still growing. From an analytical point of view, the quantitative aspects of LIBS may be considered its Achilles' heel, first due to the complex nature of the laser–sample interaction processes, which depend upon both the laser characteristics and the sample material properties, and second due to the plasma–particle interaction processes, which are space and time dependent. Together, these may cause undesirable matrix effects. Ways of alleviating these problems rely upon the description of the plasma excitation-ionization processes through the use of classical equilibrium relations and therefore on the assumption that the laser-induced plasma is in local thermodynamic equilibrium (LTE). Even in this case, the transient nature of the plasma and its spatial inhomogeneity need to be considered and overcome in order to justify the theoretical assumptions made. This first article focuses on the basic diagnostics aspects and presents a review of the past and recent LIBS literature pertinent to this topic. Previous research on non-laser-based plasma literature, and the resulting knowledge, is also emphasized. The aim is, on one hand, to make the readers aware of such knowledge and on the other hand to trigger the interest of the LIBS community, as well as the larger analytical plasma community, in attempting some diagnostic approaches that have not yet been fully exploited in LIBS.

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Section: Characterization Of the Laser Parameters And The Ablation Prsupporting

confidence: 64%

Section: Characterization Of the Laser Parameters And The Ablation Prmentioning

confidence: 99%

Laser-Induced Breakdown Spectroscopy (LIBS), Part I: Review of Basic Diagnostics and Plasma—Particle Interactions: Still-Challenging Issues within the Analytical Plasma Community

2010

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“…Other groups have reported similar evolutions for ns-laser-produced plasmas. A significant decrease of the ablation efficiency (estimated as a function of the ablated crater depth) with the increase of the melting point was reported in [94]. A similar influence of the melting point on the ablation yield was found by Schou et al [29,95], who discussed the decrease in the ablation yield as a consequence of the target cohesive energy increase.…”

Section: Resultssupporting

confidence: 71%

Experimental and Theoretical Studies on the Dynamics of Transient Plasmas Generated by Laser Ablation in Various Temporal Regimes

Nica¹,

Irimiciuc²,

Agop³

et al. 2017

Laser Ablation - From Fundamentals to Applications

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During the last decade, our groups have performed systematic experimental studies on the characterization of plasma plumes generated by laser ablation in various temporal regimes (ns, ps, fs) on materials ranging from simple metals (Al, Cu, Mn, Ni, In, W, …) to more complex compounds (ceramics, chalcogenide glasses, ferrites). Optical (fast imaging and space-and time-resolved emission spectroscopy) and electrical (mainly Langmuir probe) methods have been applied to experimentally investigate the dynamics of the plasma plume and its constituents. Influence of the target physical (thermodynamic and electrical) parameters on the plasma dynamics has been studied. A mathematical correlation between the local and global plasma parameters and the physical properties of the target was proposed for the first time. Peculiar behaviors like plume splitting or plasma oscillations have been evidenced for high laser fluence ablation in vacuum. Along with results from the literature, our findings provide convincing arguments for the existence of multiple double-layers in the laser ablation plasma plume, in a scenario including two-temperature electrons. New fractal-based theoretical approaches have been developed to qualitatively and quantitatively account for the observed phenomena. The space and time evolution of expansion velocity, particle number, current density and plasma temperature were theoretically investigated.

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“…The increase is at a much faster rate than the diameter of the crater. This has been shown in the literature for several other matrices 29,30 . As described earlier, the change in beam diameter becomes more subtle the further from the beam waist, which suggests that as the number of shots is increased for a laser that has been focused into the target, there becomes a point in which the beam has ablated the surface and sides of the crater so as only to result in an increase in crater depth, not diameter.…”

Section: Cotton Crater Development To Address Standardization In Aspesupporting

confidence: 77%

Geographic Provenancing of Unprocessed Cotton Using Elemental Analysis and Stable Isotope Ratios

Schenk¹

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Laser ablation efficiency of metal samples with UV laser nanosecond pulses

Cited by 43 publications

References 7 publications

Laser-Induced Breakdown Spectroscopy (LIBS), Part I: Review of Basic Diagnostics and Plasma—Particle Interactions: Still-Challenging Issues within the Analytical Plasma Community

Laser-Induced Breakdown Spectroscopy (LIBS), Part I: Review of Basic Diagnostics and Plasma—Particle Interactions: Still-Challenging Issues within the Analytical Plasma Community

Experimental and Theoretical Studies on the Dynamics of Transient Plasmas Generated by Laser Ablation in Various Temporal Regimes

Geographic Provenancing of Unprocessed Cotton Using Elemental Analysis and Stable Isotope Ratios

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