The response of polycrystalline tungsten to 30keV helium ion implantation at normal incidence and high temperatures

Zenobia, Samuel J.; Garrison, Lauren M.; Kulcinski, G.L.

doi:10.1016/j.jnucmat.2011.10.029

Cited by 79 publications

(57 citation statements)

References 31 publications

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“…Similar to the model for fuzz layer thickness described in [23] a fluenceindependent constant thickness of the affected layer can be expected based on a dynamic equilibrium between growth and erosion. In the much lower fluence range below 10 20 m -2 reference [9] reports a clear fluence dependence of the affected layer thickness.…”

Section: Discussionmentioning

confidence: 95%

“…In the following we investigate two of these possible causes. The most obvious is the formation of a distorted surface layer, as shown in several experiments (see references [1][2][3][4][5][6][7][8][9][10][11]), which is investigated as a function of fluence and temperature in section 3.2.1. The second is the dependence of the sputtering yield on the crystal orientation.…”

Section: Investigation Of Possible Mechanismsmentioning

confidence: 99%

“…Detailed studies of the morphology development upon irradiation with 30 or 100 keV He ions have recently been reported from electrostatic confinement devices [9,10,11].…”

Section: Introductionmentioning

confidence: 99%

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Tungsten erosion under combined hydrogen/helium high heat flux loading

et al. 2014

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We investigated the erosion behaviour of tungsten under irradiation with a fusion reactorrelevant H/He mixture of 94%/6% at a power density of 10 MW/m². The investigated surface temperatures range up to 2000°C and the range of the applied fluence was up to 7×10 25 m -2 . The erosion yield we observe exceeds the value expected from physical sputtering data by a factor of 2. In addition we observe an Arrhenius-like increase of the erosion yield with temperature with an activation energy of 0.04 eV.

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Section: Discussionmentioning

confidence: 95%

Section: Investigation Of Possible Mechanismsmentioning

confidence: 99%

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Tungsten erosion under combined hydrogen/helium high heat flux loading

et al. 2014

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“…The operating temperature strongly influence the microstructural features [88][89][90] and the PMIs include several phenomena over different range of time and length scale reported in Figure 4 taken from [87].…”

Section: Parameter Fusion Fission (Generation Iv) Spallationmentioning

confidence: 99%

A Review of Dangerous Dust in Fusion Reactors: from Its Creation to Its Resuspension in Case of LOCA and LOVA

et al. 2016

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Abstract:The choice of materials for the future nuclear fusion reactors is a crucial issue. In the fusion reactors, the combination of very high temperatures, high radiation levels, intense production of transmuting elements and high thermomechanical loads requires very high-performance materials. Erosion of PFCs (Plasma Facing Components) determines their lifetime and generates a source of impurities (i.e., in-vessel tritium and dust inventories), which cool down and dilute the plasma. The resuspension of dust could be a consequences of LOss of Coolant Accidents (LOCA) and LOss of Vacuum Accidents (LOVA) and it can be dangerous because of dust radioactivity, toxicity, and capable of causing an explosion. These characteristics can jeopardize the plant safety and pose a serious threat to the operators. The purpose of this work is to determine the experimental and numerical steeps to develop a numerical model to predict the dust resuspension consequences in case of accidents through a comparison between the experimental results taken from campaigns carried out with STARDUST-U and the numerical simulation developed with CFD codes. The authors in this work will analyze the candidate materials for the future nuclear plants and the consequences of the resuspension of its dust in case of accidents through the experience with STARDUST-U.

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“…The damage in the W lattice increases the accumulation of light species such as hydrogen [30,31] and helium [32,33], which tend to nucleate in the defects. This results in detrimental effects such as cracking, exfoliation or blistering, which are unacceptable for a PFM [34].…”

Section: Acknowledgementsmentioning

confidence: 99%

Object kinetic Monte Carlo simulations of irradiated tungsten for nuclear fusion reactors

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The response of polycrystalline tungsten to 30keV helium ion implantation at normal incidence and high temperatures

Cited by 79 publications

References 31 publications

Tungsten erosion under combined hydrogen/helium high heat flux loading

Tungsten erosion under combined hydrogen/helium high heat flux loading

A Review of Dangerous Dust in Fusion Reactors: from Its Creation to Its Resuspension in Case of LOCA and LOVA

Object kinetic Monte Carlo simulations of irradiated tungsten for nuclear fusion reactors

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