Transport of argon and iron during a resonant magnetic perturbation at TEXTOR-DED

TitleTransport of argon and iron during a resonant magnetic perturbation at TEXTOR-DED
Publication TypeJournal Article
Year of Publication2009
AuthorsA. Greiche, Y. Liang, O. Marchuk, G. Bertschinger, W. Biel, R. Burhenn, R. Dux, H.R Koslowski, A. Kramer-Flecken, K. Lowenbruck, O. Schmitz, G.W Spakman, R. Wolf
JournalPlasma Physics and Controlled Fusion
Date PublishedMar
Type of ArticleArticle
ISBN Number0741-3335
Accession NumberISI:000263382300001

Since ergodic divertors are proposed to control the impurity concentration in tokamak plasmas the influence of a resonant magnetic perturbation (RMP) from the dynamic ergodic divertor (DED) in the m/n = 3/1 mode on argon impurity transport is studied at the tokamak TEXTOR. Although the application of a DED current below the threshold for m/n = 3/1 tearing mode excitation in an NBI-heated L-mode plasma does not change the argon transport coefficients in r/a < 0.8, an additional transport mechanism within an error of 34% cannot be excluded. Observed changes of the iron ion density distribution for r/a < 0.6 can only be explained by a change of the transport. In addition the argon injection experiments show that an RMP reduces the inflow of particles into r/a < 0.8 and that a tearing mode seems to increase the local transport although at first view the experimental data indicate a reduction of the transport.

URL<Go to ISI>://000263382300001

Fusion Physics



Alternate TitlePlasma Phys. Control. Fusion

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