LIBS measurements inside the FTU vessel mock-up by using a robotic arm

Almaviva, S.; Caneve, L.; Colao, F.; Lazic, V.; Maddaluno, G.; Mosetti, Pierandrea; Palucci, A.; Reale, Andrea; Gąsior, P.; Gromelski, Wojciech; Kubkowska, M.

doi:10.1016/j.fusengdes.2020.111685

Cited by 35 publications

(13 citation statements)

References 26 publications

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“…Laser induced breakdown spectroscopy (LIBS) has been shown to be a promising method for the in-situ fuel retention monitoring in tokamaks [20][21][22][23][24][25] and linear plasma devices [26][27][28][29]. However, the line intensities in LIBS spectra depend not only on the coating composition but also on morphology and crystalline phase content [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

LIBS study of ITER relevant tungsten–oxygen coatings exposed to deuterium plasma in Magnum-PSI

Jõgi

Paris

Laan

et al. 2021

Journal of Nuclear Materials

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Section: Introductionmentioning

confidence: 99%

LIBS study of ITER relevant tungsten–oxygen coatings exposed to deuterium plasma in Magnum-PSI

Jõgi

Paris

Laan

et al. 2021

Journal of Nuclear Materials

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“…Each line was described by a pseudo-Voigt profile, which has been proposed in several papers [13,14]. The estimated parameters were used in calculations of Stark broadening, Saha equations and Boltzmann plot.…”

Section: Methodsmentioning

confidence: 99%

Tungsten plasma density and temperature time analysis using 1.064 $$\upmu $$m nanosecond dual-pulse laser

Gromelski

Gąsior

2021

Eur. Phys. J. Plus

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The information about time evolution of plasma electron temperature and density plays a fundamental role in numerous physics-related sciences. For CF DP-LIBS (calibration-free double-pulse laser-induced breakdown spectroscopy), not only may it serve to minimize the impact on the investigated sample, but also to optimize the laser and spectral parameters, or even to pave the way for real-time chemical analysis of the sample. To evaluate this impact and describe the plasma time behavior, electron temperature and density are calculated for plasma induced by double-pulse Nd:YAG laser with various (0–500 ns) inter-pulse delays. The parameters are calculated using various methods, such as Stark broadening, Boltzmann plot and Saha equation to provide complementary calculations for comparison. To ensure validity of the results, calibration of the measurement setup was performed. In the work, tungsten samples are investigated, because the W is chosen as the preferred material for plasma-facing components in future fusion devices such as ITER. Since LIBS method will be used to monitor tritium retention in ITER, the results may be utilized to improve the diagnostics.

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“…The first in a wide spectral region (210-800 nm), to detect as much as possible emission lines from all of the chemical elements; the second in a restricted spectral region (8-20 nm), with very high resolution, to resolve very close emission lines. To our knowledge, this is the first prototype of such a device mounted on a robotic arm [31]. Its main features are: (1) compactness (about 410 × 300 × 70 mm), weight (10 kg); (2) the possibility of acquiring two simultaneous LIBS spectra; (3) to perform measurements in vacuum (down to 10 −3 mbar) or under gas flow (e.g.…”

Section: Laser Induced Breakdown Spectroscopymentioning

confidence: 99%

Overview of the FTU results

et al. 2022

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Since the 2018 IAEA FEC Conference, FTU operations have been devoted to several experiments covering a large range of topics, from the investigation of the behaviour of a liquid tin limiter to the runaway electrons mitigation and control and to the stabilization of tearing modes by electron cyclotron heating and by pellet injection. Other experiments have involved the spectroscopy of heavy metal ions, the electron density peaking in helium doped plasmas, the electron cyclotron assisted start-up and the electron temperature measurements in high temperature plasmas. The effectiveness of the laser induced breakdown spectroscopy system has been demonstrated and the new capabilities of the runaway electron imaging spectrometry system for in-flight runaways studies have been explored. Finally, a high resolution saddle coil array for MHD analysis and UV and SXR diamond detectors have been successfully tested on different plasma scenarios.

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LIBS measurements inside the FTU vessel mock-up by using a robotic arm

Cited by 35 publications

References 26 publications

LIBS study of ITER relevant tungsten–oxygen coatings exposed to deuterium plasma in Magnum-PSI

LIBS study of ITER relevant tungsten–oxygen coatings exposed to deuterium plasma in Magnum-PSI

Tungsten plasma density and temperature time analysis using 1.064 $$\upmu $$m nanosecond dual-pulse laser

Overview of the FTU results

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