Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9793810 | Journal of Nuclear Materials | 2005 | 5 Pages |
Abstract
Formation of carbon dust particles on a graphite surface irradiated by a high-density hydrogen plasma and a mixed hydrogen/helium plasma has been investigated in the NAGDIS-II linear divertor plasma simulator. Carbon dust particles are generated at the center region of the graphite surface facing the high-density plasma. No dust particles are formed in the peripheral region. These observations indicate that the re-deposition process of the hydrocarbon ions due to a strong plasma flow at the center of the plasma column is one of the key factors determining the dust growth as well as chemical sputtering.
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Physical Sciences and Engineering
Energy
Nuclear Energy and Engineering
Authors
N. Ohno, Y. Kobayashi, T. Sugimoto, S. Takamura,