Surface morphology of F82H steel exposed to low-energy D plasma at elevated temperatures

Alimov, V.Kh.; Hatano, Yuji; Yoshida, N.; Bobyr, N. P.; Oyaidzu, M.; Tokitani, M.; Hayashi, T.

doi:10.1016/j.jnucmat.2018.08.037

Cited by 7 publications

(8 citation statements)

References 25 publications

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“…11) shows that surface nanostructures are enriched by W(+Ta) (and Mo). All of these findings are consistent with the literature of RAFM steels exposed to low energy (up to a few hundred eV) deuterium ions [4,6,8,10,13]. At a closer look, Eurofer-97 samples exposed in GyM developed a morphology very similar to the fence/corral-like one shown in [8], although the fluence was much higher (10 26 -10 27 m −2 ) and the ion energy was lower (∼40 eV), there.…”

Section: Discussionsupporting

confidence: 90%

“…This work adds to the broad literature of RAFM steels exposed to low energy deuterium ions of mass-selected ion beams [3,13] and plasmas of electron cyclotron resonance sources [6] and linear devices [1,4,8,10]. It continues the study of the sputtering properties of Fe-W coatings, model system of RAFM steels, with GyM [7].…”

Section: Introductionmentioning

confidence: 84%

“…Indeed, one of the processes contributing to RAFM steels' morphology development is the preferential sputtering of mid-Z elements (Fe, Cr, etc. ), which significantly depends on E 𝑖𝑜𝑛 [4,6,8,10].…”

Section: Discussionmentioning

confidence: 99%

“…In particular, since Y 𝐹 𝑒 > Y 𝑊 , Fe erodes quickly, leading to a W-rich surface difficult to be sputtered [1][2][3]; • temperature-dependent processes, such as thermal diffusion and Gibbs segregation of the different components [4][5][6][7][8][9][10][11]; • surface morphology dynamics triggered by the interplay of particle bombardment and thermal effects [4,6,[8][9][10]12,13].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Study the erosion of Eurofer-97 steel with the linear plasma device GyM

Uccello¹,

Ghezzi²,

Kovač³

et al. 2023

Nuclear Materials and Energy

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Section: Discussionsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Study the erosion of Eurofer-97 steel with the linear plasma device GyM

Uccello¹,

Ghezzi²,

Kovač³

et al. 2023

Nuclear Materials and Energy

View full text Add to dashboard Cite

“…These findings are consistent with the literature of RAFM steels exposed to low energy (a few hundred eV) deuterium ions of an ion beam in the SIESTA device [42], the ECR plasma in the experiment PlaQ [43] and high-flux linear plasma devices [44][45][46]. In particular, Eurofer-97 samples exposed in GyM developed a morphology very similar to the fence/corral-like one shown in [45], although the fluence was much higher (10 26 -10 27 ions•m −2 ) and the ion energy was lower (~40 eV), there.…”

Section: Rafm Steels Deuterium Plasma Erosionsupporting

confidence: 91%

Linear plasma device GyM for plasma-material interaction studies

et al. 2023

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GyM is a linear plasma device operating at Istituto per la Scienza e Tecnologia dei Plasmi, Consiglio Nazionale delle Ricerche, Milan, with the original aim of studying basic plasma physics, such as turbulent processes. Since 2014, GyM experimental program has been mainly focused on the issue of plasma-material interaction (PMI) for magnetic confinement nuclear fusion applications. GyM consists of a stainless steel vacuum chamber (radius and length of 0.125 m and 2.11 m), a pumping system, a gas injection system, 10 magnetic field coils and two magnetron sources at 2.45 GHz, capable of delivering a total microwave power up to 4.5 kW. Highly reproducible steady-state plasmas of different gas species, at a maximum working pressure of ∼10−1 Pa, can be obtained by electron cyclotron resonance heating in the resonance layer at 87.5 mT. Plasmas of GyM have electron and ion temperature ≤15 eV and ∼0.1 eV, respectively. The electron density is in the range of 1015–1017 m−3 and the ion flux is ≤5 × 1020 ions⋅m−2s−1. Main plasma diagnostics of GyM comprise Langmuir probes, an optical emission spectrometer, a mass spectrometer and a fast camera system equipped with an image intensifier unit. For the purpose of investigating the topic of PMI, GyM is provided with two sample exposure systems. Both are biasable at a negative bias voltage down to −400 V, to tune the energy of the impinging ions. One of them is also equipped with a heating lamp and can reach and sustain a temperature of 990 K for several hours, thus allowing to study the role of sample temperature during the plasma-material interaction. This contribution presents the layout of GyM, the diagnostics, the sample exposure systems and the typical plasma parameters. A brief overview of the main PMI activities carried out so far and a description of future machine upgrades are also given.

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