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Abstract

The erosion, plasma penetration and redeposition of divertor plate material such as C, Si, V, Mo and W have been studied in the ASDEX-Upgrade divertor. Long-term erosion and redeposition have been studied using evaporated markers, while time resolved measurements and plasma penetration were studied spectroscopically on W tiles. The expected reduction of erosion due to plasma ion sputtering was confirmed. This reduced erosion is accompanied by largely enhanced deposition for high-Z ions, when the gyroradius exceeds the ionisation length.

Additional information

Authors: ROTH J, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);NAUJOKS D, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);KRIEGER K, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);FIELD A, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);HIRSCH S, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);LIEDER G, Universität Stuttgart, Institut für Plasmaforschung (DE)
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 220-222 (1995) pp. 231-234
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