Erosion and deposition of metals and carbon in the DIII-D divertor

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Net erosion rates at the outer strike point of the DIII-D divertor plasma were measured for several materials during quiescent H-mode operation with deuterium plasmas. Materials examined include graphite, beryllium, tungsten, vanadium and molybdenum. For graphite, net erosion rates up to 4 nm/sec were found. Erosion rates for the metals were much smaller than for carbon. Ion fluxes from Langmuir probe measurements were used to predict gross erosion by sputtering. Measured net erosion was much smaller than predicted gross erosion. Transport of metal atoms by the plasma across the divertor surface was also examined. Light atoms were transported farther than ... continued below

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18 p.

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Wampler, W.R.; Bastasz, R. & Buchenauer, D. October 1995.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Net erosion rates at the outer strike point of the DIII-D divertor plasma were measured for several materials during quiescent H-mode operation with deuterium plasmas. Materials examined include graphite, beryllium, tungsten, vanadium and molybdenum. For graphite, net erosion rates up to 4 nm/sec were found. Erosion rates for the metals were much smaller than for carbon. Ion fluxes from Langmuir probe measurements were used to predict gross erosion by sputtering. Measured net erosion was much smaller than predicted gross erosion. Transport of metal atoms by the plasma across the divertor surface was also examined. Light atoms were transported farther than heavy atoms as predicted by impurity transport models.

Physical Description

18 p.

Notes

INIS; OSTI as DE96000776

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  • ICFRM-7: international conference on fusion reactor materials, Obninsk (Russian Federation), 25-29 Sep 1995

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  • Other: DE96000776
  • Report No.: SAND--95-0804C
  • Report No.: CONF-950961--1
  • Grant Number: AC04-94AL85000;AC03-89ER51114
  • Office of Scientific & Technical Information Report Number: 110719
  • Archival Resource Key: ark:/67531/metadc623585

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  • October 1995

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  • June 16, 2015, 7:43 a.m.

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  • April 14, 2016, 9:37 p.m.

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Wampler, W.R.; Bastasz, R. & Buchenauer, D. Erosion and deposition of metals and carbon in the DIII-D divertor, article, October 1995; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc623585/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.