Transport of argon and iron during a resonant magnetic perturbation at TEXTOR-DED
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Author | |
Abstract |
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. |
Year of Publication |
2009
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Journal |
Plasma Physics and Controlled Fusion
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Volume |
51
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Number |
3
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Number of Pages |
7
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Date Published |
Mar
|
Type of Article |
Article
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ISBN Number |
0741-3335
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Accession Number |
ISI:000263382300001
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URL | |
PId |
10f5daa5e4d1b98d5e70a8f8e2fa90ed
|
Alternate Journal |
Plasma Phys. Control. Fusion
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Journal Article
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