Modelling of tungsten sputtering by argon particle bombardment on a fuzzy surface

Liu, D.H.; Dai, Shuyu; Nishijima, D.; Yang, K.R.; Chen, J.Y.; Xu, Yunfeng; Wang, D.Z.

doi:10.1016/j.nme.2022.101205

Cited by 2 publications

(4 citation statements)

References 33 publications

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“…In this work, the construction module in SURO-FUZZ has been momentously improved by adopting a more advanced approach, which is termed the quartet structure generation set (QSGS) [23]. The QSGS approach allows for more flexible adjustment of the porous structure, in comparison with the previous approach used in SUOR-FUZZ [18][19][20].…”

Section: Simulation Modelmentioning

confidence: 99%

“…While, the complicated physical processes involved during W fuzz growth necessitate a lot of time to simulate. Consequently, a constructed fuzzy surface morphology has been subsequently developed as the construction module to save computational resource, which can form porous structure according to a predefined porosity distribution using MC method [18][19][20]. In this work, the construction module in SURO-FUZZ has been momentously improved by adopting a more advanced approach, which is termed the quartet structure generation set (QSGS) [23].…”

Section: Simulation Modelmentioning

confidence: 99%

“…In this work, the numerical modelings of D retention in W fuzz have been conducted using SURO-FUZZ, which are benchmarked against the experimental data on the laboratory device MIES [14]. Previous work has shown that W nanostructures play an important role in the sputtering of W fuzzy surfaces [20]. This motivates us to examine the impacts of the microscopic structures of W fuzzy surface on D retention in this study.…”

Section: Introductionmentioning

confidence: 99%

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Studies on the impacts of the pore size and shape on deuterium retention in tungsten fuzzy nanostructures

Chen,

Dai,

Yang

et al. 2024

Nucl. Fusion

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Tritium retention in plasma-facing materials is a critical issue that can significantly impact the long-term and steady-state operation of fusion devices. The experiments conducted in the laboratory device MIES have confirmed that the presence of the tungsten (W) nanostructure (called “fuzz”) leads to a substantial retention of hydrogen isotopes within W fuzz layer. This observation motivates us to conduct dedicated modelling to investigate the influence of W nanostructures on deuterium (D) retention using the three-dimensional kinetic Monte Carlo code SURO-FUZZ. The SURO-FUZZ code offers a great flexibility in generating diverse microscopic structures of the W fuzzy surface through the quartet structure generation set (QSGS) approach, which allows us to explore the effects of the pore size and shape on D retention. In this study, several different W nanostructures generated by QSGS approach are utilized to conduct a comprehensive comparison between MIES experiments and SURO-FUZZ simulations. It is demonstrated that the simulated D retention can be brought into a reasonable agreement with the experimental data. On this basis, predictive estimations of D retention on EAST and ITER have been performed with SURO-FUZZ modelling. The simulation results indicate that the total D retention induced by W fuzz remains well below the administrative limit of 700 g.

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Section: Simulation Modelmentioning

confidence: 99%

Section: Simulation Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Studies on the impacts of the pore size and shape on deuterium retention in tungsten fuzzy nanostructures

Chen,

Dai,

Yang

et al. 2024

Nucl. Fusion

Self Cite

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“…This effect was mainly attributed to the re-deposition of sputtered atoms to neighboring structures. Several models [132,[145][146][147] as shown in figure 14 have been proposed to study the sputtering yield of fuzz structures by constructing a 3D structure of fuzz. The influence of some important factors, including ion energies, incidence angles and fuzz thickness, were studied.…”

Section: Integrated Model For Plasma-materials Interactions Under Fus...mentioning

confidence: 99%

Modeling tungsten response under helium plasma irradiation: a review

Yang¹,

Fan²

2022

Plasma Sci. Technol.

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Tungsten, a leading candidate for plasma facing materials (PFM) in future fusion devices, will be exposed to high-flux low-energy helium plasma under the anticipated fusion operation conditions. In the past two decades, experiments have revealed that exposure to helium plasma strongly modified the surface morphology and hence the sputtering, thermal and other properties of tungsten, posing a serious danger to the performance and the lifetime of tungsten and the steady-state operation of plasma. In this article, we provide a review of modeling and simulation efforts on the long-term evolution of helium bubbles, surface morphology, and property changes of tungsten exposed to low-energy helium plasma. The current gap and outstanding challenges to establish a predictive modeling capability for dynamic evolution of PFM are discussed.

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Modelling of tungsten sputtering by argon particle bombardment on a fuzzy surface

Cited by 2 publications

References 33 publications

Studies on the impacts of the pore size and shape on deuterium retention in tungsten fuzzy nanostructures

Studies on the impacts of the pore size and shape on deuterium retention in tungsten fuzzy nanostructures

Modeling tungsten response under helium plasma irradiation: a review

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