Incident-mass dependence of temperature-enhanced ion-induced sputtering in liquid metals

Coventry, M. D.; Ruzic, D. N.

doi:10.1016/j.jnucmat.2004.10.088

Cited by 4 publications

(5 citation statements)

References 18 publications

(24 reference statements)

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“…This data fits with earlier results on Sn by Coventry et al [6,7] which also shows a differing temperature onset for anomalous erosion for differing ion species. In their case the onsets for increased erosion were >700°C, >500°C and >300°C for Ar, He and D ions at 1000 eV and fluxes between 10 17 and 10 18 particles m À2 s À1 .…”

Section: Discussionsupporting

confidence: 92%

“…Many experiments [2][3][4][5][6][7] have reported an enhancement of the erosion yield of materials under plasma bombardment as a function of temperature above that expected from physical sputtering and evaporation alone. If migration of material eroded from an LM surface by the plasma into the core of the tokamak becomes too large, this could lead to large-scale cooling of the plasma leading to the extinguishing of the fusion reaction.…”

Section: Introductionmentioning

confidence: 99%

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Interaction of a tin-based capillary porous structure with ITER/DEMO relevant plasma conditions

Morgan

Bekerom

Temmerman

2015

Journal of Nuclear Materials

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a b s t r a c tSn filled capillary porous structures were exposed to high flux low temperature plasma conditions at the Pilot-PSI linear device. Enhanced erosion above that expected classically was investigated via spectroscopic observation of Sn 0 emission from the plasma in front of the target surface while the surface temperature was monitored by both thermography and pyrometry. An anomalous erosion flux was observed as temperature increases, with onset for this occurrence varying strongly between different ion species. The results appear incompatible with existing 'adatom' models for the anomalous erosion flux. Further targets were exposed in turn to increasing heat fluxes and the heat removed determined from cooling water calorimetry, which was then compared to a solid Mo reference target. At high powers the total energy of the cooling water is reduced, indicating a shielding of the surface from the plasma heat flux by the vapour cloud in front.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Interaction of a tin-based capillary porous structure with ITER/DEMO relevant plasma conditions

Morgan

Bekerom

Temmerman

2015

Journal of Nuclear Materials

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“…Previous results [11] showed clear, little, and no temperature-dependence for sputtering of liquid Sn by low energy He+, Ne+, and Ar+, respectively. The focus of this study was to determine whether: (a) Heavy ion bombardment doesn't induce temperature-enhanced sputtering; or (b) Increasing the ion mass simply increases the temperature at which temperature-enhancement is obvious.…”

Section: B Temperature-enhanced Sputteringmentioning

confidence: 79%

“…Evidence of temperature-enhanced sputtering for liquid metals under low energy ion bombardment has been recently noted [9][10][11][12]. Previous results [11] showed clear, little, and no temperature-dependence for sputtering of liquid Sn by low energy He+, Ne+, and Ar+, respectively.…”

Section: B Temperature-enhanced Sputteringmentioning

confidence: 91%

Measurement of low energy sputtering of high temperature liquid tin for divertor applications

Coventry¹,

Stubbers

Ruzic

2005

21st IEEE/NPS Symposium on Fusion Engineering SOFE 05

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Temperature-enhanced sputtering of liquid Sn under low energy light and heavy ion bombardment measured using dual quartz-crystal microbalances is reported. This is in support of the potential use of a flowing liquid Sn surface as a plasmafacing component in advanced fusion machines as both a divertor surface and a first-wall material.Previously, significant temperature enhancement under heavy ion bombardment was not reported; this study, extending results to higher temperatures show and order of magnitude enhancement of the absolute sputtering yield beyond mere thermal evaporation which is separately measured.Keywords-liquid metal sputtering; temperature-enhanced sputtering; liquid metal PFC; liquid Sn. I.

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“…The zone of hot atoms is located on the surface and below the groove and runs up the wall of the right ridge. The maintenance of the temperature below the melting point avoids its influence on the processes studied, especially in the sputtering of light cluster atoms [23]. In the case of He, the number of atoms that reach the melting temperature (in the order of 25) is lower than that of Ne.…”

Section: Temperaturementioning

confidence: 99%

Surface Ripple Formation by Bombardment with Clusters: Influence of Mass

Jiménez-Sáez,

Muñoz,

Palacios

2024

Applied Sciences

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Nanostructure formation on Co(110) surfaces was studied by using irradiation with cluster ion beams with oblique incidence and an energy of 250 eV/atom. In this work, the effect of the mass of the cluster projectiles on the process was analyzed. The launched clusters were formed by different types of charged atoms: He, Ne, Ar, Kr, and Xe. Due to the different collision processes, the formed surface patterns stand out more if the mass of the projectile atoms is greater, regardless of the angle of incidence of the clusters. Two processes control the morphological evolution of the surface during the bombardment phase: sputtering erosion and surface atomic redistribution. At grazing angles, the contribution of sputtering is greater during the process. In fact, heavier species give greater sputtering, and the redistribution factor becomes lower. The weight of redistribution is greater for intermediate angles above the critical angle (50° and 60°), since the displacement is greater for heavier species, and the redistribution factor takes substantially higher values. The experimental results point to a shift in the critical angle with the mass of the projectile atom. In the case of He, a very light ion, the results are marked by channeling and vertical displacements.

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Incident-mass dependence of temperature-enhanced ion-induced sputtering in liquid metals

Cited by 4 publications

References 18 publications

Interaction of a tin-based capillary porous structure with ITER/DEMO relevant plasma conditions

Interaction of a tin-based capillary porous structure with ITER/DEMO relevant plasma conditions

Measurement of low energy sputtering of high temperature liquid tin for divertor applications

Surface Ripple Formation by Bombardment with Clusters: Influence of Mass

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