Carbon implantation into tungsten at elevated temperatures

Eckstein, W.; Shulga, V. I.; Roth, J.

doi:10.1016/s0168-583x(98)01018-0

Cited by 36 publications

(17 citation statements)

References 27 publications

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“…By using this code, fluence-evolution of atomic compositions in the target due to collision cascades and thermal diffusion of impurities deposited on the target is calculated. The calculation is quite similar to that used in TRIDYN/ PIDAT [4], which combines the collision cascades with the thermal diffusion. The collision cascade is simulated in the same manner as that used in TRIM [5].…”

Section: Simulation Code and Modelmentioning

confidence: 99%

Simulation study of dynamical material mixing on tungsten surfaces at elevated temperatures due to hydrogen and carbon mixed ion beam irradiation

Kawakami

Shimada

Ueda

et al. 2004

Journal of Nuclear Materials

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Section: Simulation Code and Modelmentioning

confidence: 99%

Simulation study of dynamical material mixing on tungsten surfaces at elevated temperatures due to hydrogen and carbon mixed ion beam irradiation

Kawakami

Shimada

Ueda

et al. 2004

Journal of Nuclear Materials

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“…Tungsten erosion by C ions has been studied previously via weight loss measurements at RT [3] and elevated temperatures [4,5]. The W sputter yield was seen to decrease with increasing C concentration at the surface, and subsequent formation of a closed C layer shielded the underlying W from further sputtering.…”

Section: Introductionmentioning

confidence: 99%

“…The W sputter yield was seen to decrease with increasing C concentration at the surface, and subsequent formation of a closed C layer shielded the underlying W from further sputtering. Carbon diffusion resulted in changes to the implanted C depth profiles at K T 900 > [4] resulting in increased W sputtering by reducing the rate of C surface buildup. In addition, enhanced sputtering yield of carbon with increasing temperature occurs for all ions [5,6,7] due to weakly bound or sublimation of carbon interstitials formed during irradiation [6,8].…”

Section: Introductionmentioning

confidence: 99%

Modeling tungsten and carbon sputtering by carbon at elevated temperatures

Lee

Krieger

2009

Phys. Scr.

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Abstract. The planned use of carbon strike plates adjacent to tungsten tiles in the ITER divertor will lead to W erosion by sputtered C ions. The W sputtering yield by C decreases with increasing surface concentration of the implanted C. However with increasing temperature, the C self-sputtering yield increases, reducing the rate of C surface coverage. This study attempts to model the temperature dependent C self-sputtering process and its impact on W erosion by using modified surface binding energies (SBEs) in TRIDYN. The SBEs are benchmarked against C self-sputtering yields measured in this study and W irradiation by C is simulated and compared to previous experimental results. Good agreement between simulation and experiments is seen at 670 K, while small deviations are observed at 770 K due to surface roughening. At 870 K, significant deviation is observed which can be attributed to enhanced surface roughening as well as diffusion effects.

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“…carbon implantation to tungsten and mixed layer formation [3][4][5], by the carbon ion beam with the ion energies in a keV range. The dynamic simulation code based on the Monte Carlo program TRYDYN [6] as well as EDDY [7] can successfully simulate experimental data including the effects of carbon diffusion in tungsten [3,8].…”

Section: Introductionmentioning

confidence: 99%

Effects of tungsten surface conditions on carbon deposition

Ueda¹,

Fukumoto²,

Yamawaki³

et al. 2009

Journal of Nuclear Materials

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New results are shown on carbon deposition and mixed layer formation on tungsten surfaces in TEXTOR test limiter experiments by varying surface conditions such as surface roughness (R a : 10 nm ~1 µm), temperature (300 °C ~ 900 °C), and initial surface carbon concentration (0% ~ 60%). It is found that surface roughness significantly affected C deposition for both W and graphite substrates such as increase in the C deposition and extension of the C deposition area. Not only the surface roughness parameter R a but also detailed surface morphology closely relate to C deposition on tungsten. Carbon deposition hardly occurred at least above ~520 ºC on tungsten under TEXTOR edge plasma conditions. Carbon behavior on tungsten at 770 ~ 930 ºC depends on the incident carbon ion energy. Although tungsten and carbon mixing layers affected C deposition, their effect is less than the roughness effect.-2 -PACS: 28.52.Fa (fusion reactor materials); 52.40.Hf (Plasma-material interactions)

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Carbon implantation into tungsten at elevated temperatures

Cited by 36 publications

References 27 publications

Simulation study of dynamical material mixing on tungsten surfaces at elevated temperatures due to hydrogen and carbon mixed ion beam irradiation

Simulation study of dynamical material mixing on tungsten surfaces at elevated temperatures due to hydrogen and carbon mixed ion beam irradiation

Modeling tungsten and carbon sputtering by carbon at elevated temperatures

Effects of tungsten surface conditions on carbon deposition

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