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Measurements of carbon and tungsten erosion/deposition in the DIII-D divertor

Description: Net erosion/deposition rates of carbon and tungsten were measured at the outer strike point of the divertor plasma on the floor of the DIII-D tokamak during deuterium H-mode operation at a peak power deposition of about 40 W/cm{sup 2}. For carbon, net erosion rates of up to 4 nm/s were found. For a tungsten film, no appreciable erosion was detected. However, measurements of deposited tungsten on adjacent carbon surfaces indicated a net W erosion rate of 0.06 nm/s.
Date: August 1, 1994
Creator: Bastasz, R.; Wampler, W. R.; Cuthbertson, J. W.; Buchenauer, D. A.; Brooks, N.; Junge, R. et al.
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Partner: UNT Libraries Government Documents Department
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OEDGE Modeling of {sup 13}C Deposition in the Inner Divertor of DIII-D

Description: Use of carbon in tokamaks leads to a major tritium retention issue due to co-deposition. To investigate this process a low power (no beams) L-mode experiment was performed on DIII-D in which {sup 13}CH{sub 4} was puffed into the main vessel through the toroidally-symmetric pumping plenum at the top of lower single-null discharges. Subsequently, the {sup 13}C content of tiles taken from the vessel wall was measured. The interpretive OEDGE code was used to model the results. It was found that the… more
Date: December 1, 2004
Creator: Elder, J.; Stangeby, P.; Whyte, D.; Allen, S.; McLean, A.; Boedo, J. et al.
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Partner: UNT Libraries Government Documents Department
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Plasma boundary experiments on DIII-D tokamak

Description: A survey of the boundary physics research on the DIII-D tokamak and an outline of the DIII-D Advanced Divertor Program (ADP) is presented. We will present results of experiments on impurity control, impurity transport, neutral particle transport, and particle effects on core confinement over a wide range of plasma parameters, I{sub p}{approx lt} 3 MA, {beta}{sub T} {approx lt} 10.7%, P(auxiliary) {approx lt} 20 MW. Based on the understanding gained in these studies, we in collaboration with a n… more
Date: June 1, 1990
Creator: Mahdavi, M. A.; Brooks, N.; Jackson, G. L.; Langhorn, A.; Leikind, B.; Lippmann, S. et al.
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Partner: UNT Libraries Government Documents Department
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