Contribution to a better evaluation of the dust speciation in case of an accident in ITER

Virot, François; Ferry, Lionel; Ferro, Y.; Pardanaud, C.; Barrachin, M.

doi:10.1016/j.fusengdes.2017.02.102

Cited by 5 publications

(1 citation statement)

References 29 publications

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“…In most publications, only frequencies of the hydride isotope are provided, that has to be multiplied by a correction factor taking into account a reduced mass involving deuterium (see details in [68]). Spectroscopic signatures are supposed to be lower than 1500 cm −1 for bulk phases, as shown by their PDOS [63][64][65]. Crystalline phases have been studied at ambient and high pressure environments, leading to a large number of bands below 1500 cm −1 [66].…”

Section: Raman Spectroscopy Of Beryllium Carbides Hydrides and Oxidesmentioning

confidence: 99%

Raman microscopy to characterize plasma-wall interaction materials: from carbon era to metallic walls

Pardanaud,

Martin,

Roubin

et al. 2023

Mater. Res. Express

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Plasma-wall interaction in magnetic fusion devices is responsible for wall changes and plasma pollution with major safety issues. It is investigated both in situ and ex situ, especially by realizing large scale dedicated poWst-mortem campaigns. Selected parts of the walls are extracted and characterized by several techniques. It is important to extract hydrogen isotopes, oxygen or other element content. This is classically done by ion beam analysis and thermal desorption spectroscopy. Raman microscopy is an alternative and complementary technique. The aim of this work is to demonstrate that Raman microscopy is a very sensitive tool. Moreover, if coupled to other techniques and tested on well-controlled reference samples, Raman microscopy can be used efficiently for characterization of wall samples. Present work reviews long experience gained on carbon-based materials demonstrating how Raman microscopy can be related to structural disorder and hydrogen retention, as it is a direct probe of chemical bonds and atomic structure. In particular, we highlight the fact that Raman microscopy can be used to estimate the hydrogen content and bonds to other elements as well as how it evolves under heating. We also present state-of-the-art Raman analyses of beryllium- and tungsten-based materials, and finally, we draw some perspectives regarding boron-based deposits.

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