Absorption of a nanosecond laser pulse by a picosecond laser-induced preformed aluminum plasma

Favre, Aurélien; Morel, Vincent; Bultel, Arnaud; Godard, Gilles; Idlahcen, Saïd; Grisolia, Christian

doi:10.1016/j.sab.2020.106011

Cited by 5 publications

(2 citation statements)

References 38 publications

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“…Each fiber does not necessarily collect the same radiative flux owing to the solid angles of collection and the non-uniformity of the emitting plasma. The final emission spectrum is obtained through a vertical binning for each wavelength and is displayed in the lower part of figure 3 [30,31].…”

Section: Spectroscopic Analysismentioning

confidence: 99%

A step towards the diagnostic of the ITER first wall: in-situ LIBS measurements in the WEST tokamak

Favre,

Bultel,

Lamine Sankhe

et al. 2024

Phys. Scr.

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As part of the development of proven diagnostics allowing the characterization of ITER’s PFUs (Plasma Facing Units) without dismantling, LIBS (Laser-Induced Breakdown Spectroscopy) is a serious candidate for determining the multi-elemental composition. In this article, we report a measurement campaign carried out within the WEST tokamak using an original device based on the following technological choices. (1) The laser source and the spectrometer are placed outside the tokamak. (2) The laser pulses are conveyed by an optical fiber. (3) The signals are collected by a second optical fiber. (4) The optical focusing and collection device is placed in the desired location by a remote handling arm (AIA, Articulated Inspection Arm). The processed signals allow the measurement of the composition of the irradiated material. The technological choices are discussed in the light of their implementation and proposals are made for a more efficient future version of the system.

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Section: Spectroscopic Analysismentioning

confidence: 99%

A step towards the diagnostic of the ITER first wall: in-situ LIBS measurements in the WEST tokamak

Favre,

Bultel,

Lamine Sankhe

et al. 2024

Phys. Scr.

Self Cite

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“…However, it must not be too short since the first plasma can effectively shield the energy delivered by the second laser pulse [27]. At present, the lasers used in LIBS are mostly Q-switched lasers, in which almost all the energy accumulated in the active material is released in a very short-term generation process in the form of a nanosecond pulse, although there is a number of papers on DP LIBS with ps and fs lasers, for example [28][29][30]. This energy is accumulated as a result of pumping which lasts much longer, usually within a time comparable to the lifetime of the active material (in solids it is of the order of several hundred µs).…”

Section: Introductionmentioning

confidence: 99%

Collinear double-pulse laser-induced breakdown spectroscopy using Nd:YAG laser generating two nanosecond pulses of regulated energy ratios

Skrzeczanowski,

Skórczakowski,

Żendzian

2023

Metrology and Measurement Systems

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In the paper results of single-and double-pulse LIBS (Laser-Induced Breakdown Spectroscopy) measurements in collinear geometry are described. The experiments were performed using a unique self-made Nd:YAG laser operating in the Q-switching regime, where the laser transmission losses are switched. Such a laser allowed for an easy and quick change of the operating mode (one and two pulses), free shaping of the energy ratio of the two pulses (division of the energy of a single pulse into two parts) and a smooth change of the delay time between pulses in the range from 200 ns to 10 μs. To our knowledge, such a laser was used in LIBS measurements for the first time. LIBS experiments revealed strong self-absorption depending on energy ratios carried out in the first and second laser pulse in the double-pulse mode. This was confirmed also by statistical factorial analysis of LIBS spectra. Plasma temperature and LIBS signal enhancement were measured both for energy proportions between the first and the second laser pulse and for the first-to-second-pulse delay.

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Transparent superhydrophobic glass prepared by laser-induced plasma-assisted ablation on the surface

et al. 2022

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Absorption of a nanosecond laser pulse by a picosecond laser-induced preformed aluminum plasma

Cited by 5 publications

References 38 publications

A step towards the diagnostic of the ITER first wall: in-situ LIBS measurements in the WEST tokamak

A step towards the diagnostic of the ITER first wall: in-situ LIBS measurements in the WEST tokamak

Collinear double-pulse laser-induced breakdown spectroscopy using Nd:YAG laser generating two nanosecond pulses of regulated energy ratios

Transparent superhydrophobic glass prepared by laser-induced plasma-assisted ablation on the surface

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