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Far scrape-off layer and near wall plasma studies in DIII-D

Far scrape-off layer and near wall plasma studies in DIII-D,10.1016/j.jnucmat.2004.10.094,Journal of Nuclear Materials,D. L. Rudakov,J. A. Boedo,R. A.

Far scrape-off layer and near wall plasma studies in DIII-D  
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D. L. Rudakov, J. A. Boedo, R. A. Moyer, N. H. Brooks, R. P. Doerner, T. E. Evans, M. E. Fenstermacher, M. Groth, E. M. Hollmann, S. Krasheninnikov, C. J. Lasnier, M. A. Mahdavihttp://academic.research.microsoft.com/io.ashx?type=5&id=12260212&selfId1=0&selfId2=0&maxNumber=12&query=
Far scrape-off layer (SOL) plasma parameters in DIII-D depend strongly on the discharge density and confinement regime. In L-mode, cross-field transport increases with the average discharge density and elevates the far SOL density, thus increasing plasma-wall contact. Far SOL density near the low field side (LFS) of the main chamber wall also increases with decreasing plasma current and with decreasing outer wall gap. In H-mode, between edge localized modes (ELMs), plasma-wall contact is weaker than in L-mode. During ELMs plasma fluxes to the LFS wall increase to, or above the L-mode levels. A large fraction of the net cross-field fluxes is convected through the SOL by large amplitude intermittent transport events. In high-density L-mode and during ELMs in H-mode, intermittent events propagate all the way to the LFS wall and may cause sputtering.
Journal: Journal of Nuclear Materials - J NUCL MATER , vol. 337, pp. 717-721, 2005
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