In-depth analysis of ITER-like samples composition using laser-induced breakdown spectroscopy

Mercadier, Laurent; Semerok, A.; Kizub, P; Leontyev, A. V.; Hermann, J.; Grisolia, Christian; Thro, P.-Y.

doi:10.1016/j.jnucmat.2011.05.030

Cited by 42 publications

(15 citation statements)

References 27 publications

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“…This result is also valid for tungsten (that is, the layer substrate). This can be associated with the Gaussian laser beam intensity distribution and with the consecutive non homogeneous in-depth ablation which is more rapid for the central zone with higher laser intensity [8]. One should note that transportation of a top-hat laser beam for remote measurements (10 m distance, in our case) is not possible.…”

Section: Discussionmentioning

confidence: 90%

“…The first one is ablation of etalon samples with the known elemental content which is followed by calibration curve method. LIBS studies with ITER-like samples have already been initiated [8]. Calibration-free method may be advised as another solution [11,[38][39].…”

Section: Discussionmentioning

confidence: 99%

“…Our laboratory LIBS experiments with different DL were also aimed to study how quantitative data from LIBS signal and its evolution may be extracted. The studies were made in CEA, France within the frames of EFDA programs and ITER project [5][6][7][8][9][10][11]. Feasibility of LIBS remote measurements was demonstrated with nanosecond Nd-YAG lasers (at 5-10 m distance, under a reduced pressure) with the samples from the European tokamaks (TORE SUPRA, France and TEXTOR, Germany) and with ITER-like samples.…”

Section: Introductionmentioning

confidence: 99%

“…To determine the optimal regime of our specific JET in situ measurements, preliminary laboratory LIBS studies (on laser/target interaction regime, collection optics, optical spectrometer features, ICCD-camera and detection regime, analytical wavelengths and spectral line intensities) were made with the tiles from TEXTOR (Jülich, Germany) and TORE Supra (Cadarache, France) tokamaks and with ITER-like samples [5][6][7][8][9][10][11]. The laboratory LIBS studies were made with the installation developed earlier in CEA for the Mars surface analysis (the NASA Mars Rover Curiosity mission, within the ChemCam project [29][30][31]).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Laser induced breakdown spectroscopy application in joint European torus

Semerok

L’Hermite

Weulersse

et al. 2016

Spectrochimica Acta Part B: Atomic Spectroscopy

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The results on the first successful application of Laser Induced Breakdown Spectroscopy (LIBS) for remote in situ diagnostics of plasma facing components (a deposited layer on a divertor tile) in Joint European Torus (JET) are presented. The studies were performed with an available JET EDGE LIDAR laser system. For in-depth analysis of deposited layers on JET divertor tiles, a number of laser shots were applied onto the same divertor place without laser beam displacement. The spectral lines of D, CII and impurity elements (CrI, BeII, …) were identified in a wide spectral range (400-670 nm). With the increase in a number of laser shots applied onto the same divertor place, we observed consecutive changes in spectral line intensities of deuterium, carbon, and impurities with the appearance of spectral lines of tungsten substrate (WI). In-depth analysis of deposited layers on JET divertor tiles was made on the basis of the spectral line behaviour in reference to the applied laser shots. The possibility of surface cartography with laser beam displacement on the tile surface was demonstrated as well. Based on the results obtained, we may conclude that LIBS method is applicable for in situ remote analysis of deposited layers of JET plasma facing components.

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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Laser induced breakdown spectroscopy application in joint European torus

Semerok

L’Hermite

Weulersse

et al. 2016

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…In addition, they are bombarded by electromagnetic radiation and neutrons are created in the plasma. Because of the interactions between the edge plasma and the first walls, the wall materials are subjected to harmful mechanisms, such as erosion, re-deposition and fuel retention [3][4][5][6][7][8]. As a results, the performance of the system is affected and safety issues are raised, therefore control of steadystate and transient wall power loads to technically acceptable limits and the control of the in-vessel tritium inventory are required.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of laser ablation of molybdenum target for laser-induced breakdown spectroscopic application

Fu¹,

Wang²,

Ding³

2018

Plasma Sci. Technol.

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Laser-induced breakdown spectroscopy has been recognized as a significant tool for element diagnostics in plasma-wall interaction. In this work, a one-dimensional numerical model is developed to simulate the laser ablation processes of a molybdenum (Mo) target in vacuum conditions. The thermal process of the interaction between the ns-pulse laser with wavelength of 1064 nm and the Mo target is described by the heat conduction equation. The plasma plume generation and expansion are described by Euler equations, in which the conservation of mass density, momentum and energy are included. Saha equations are used to describe the local thermal equilibrium of electrons, Mo atoms,

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