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Changes in particle transport as a result of resonant magnetic perturbations in DIII-Da)
a)Paper CI2 2, Bull. Am. Phys. Soc. 56, 56 (2011).
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10.1063/1.4718316
/content/aip/journal/pop/19/5/10.1063/1.4718316
http://aip.metastore.ingenta.com/content/aip/journal/pop/19/5/10.1063/1.4718316

Figures

Image of FIG. 1.
FIG. 1.

Temporal evolution of the two experimental setups discussed in this paper. (a) In these discharges, and the line integrated density before the RMP-coil is activated is . During these discharges, a modulated gas puff is applied in order to obtain the perturbed D and v measurements. The RMP-coil current is varied from 0 to 4 and 6.2 kA and at 6.2 kA ELMs are suppressed, as shown in the traces. (b) These discharges are very similar to the ones in (a). The main difference is in a slightly higher and lower RMP-coil currents, namely 2 and 4 kA.

Image of FIG. 2.
FIG. 2.

Experimental density profiles in normalized poloidal flux at 3000 ms from the Thomson scattering system with calculated fit for (a) discharges 126443 (0 kA black), 126435 (4 kA blue), and 126442 (6.2 kA red); (b) discharges 142245 (0 kA black), 142254 (2 kA blue), and 142243 (4 kA red). In all of these discharges, there is a reduction in the density profile that penetrates all the way into the core.

Image of FIG. 3.
FIG. 3.

with fitting uncertainties for three discharges: without RMP, 4 kA, and 6.2 kA. (a) shows the increase in from with increasing RMP and (b) shows the decrease in from with increasing RMP.

Image of FIG. 4.
FIG. 4.

Perturbed D and v measurements for three discharges with 0, 2, and 4 kA. D increases with increasing RMP-coil current and the inward pinch v decreases.

Image of FIG. 5.
FIG. 5.

Time evolution of a discharge with 4 kA RMP-coil current. At , the density fluctuations at instantly increase when the coil current is applied.

Image of FIG. 6.
FIG. 6.

Changes in as measured by the BES from up to . Applying RMPs leads to an increase in over the whole measured radius.

Image of FIG. 7.
FIG. 7.

is strongly reduced as a result of RMPs from up to .

Image of FIG. 8.
FIG. 8.

Linear correlation between the linear growth rate calculated by TGLF and at from the BES.

Image of FIG. 9.
FIG. 9.

Changes in at at the plasma edge. At this k-scale, increases only when enough (4 kA in this case) RMP-coil current is applied.

Image of FIG. 10.
FIG. 10.

Linear correlation between the linear growth rate calculated by TGLF and at from the DBS.

Image of FIG. 11.
FIG. 11.

Changes in the radial profile of the toroidal carbon rotation. The toroidal rotation decreases in the core and increases towards the edge.

Image of FIG. 12.
FIG. 12.

for three discharges: without RMP, 4 kA, and 6.2 kA. (a) shows the increase in from with increasing RMP and (b) shows the decrease in from with increasing RMP.

Tables

Generic image for table
Table I.

Various results in the literature for stochastic magnetic diffusion.

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2012-05-30
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Changes in particle transport as a result of resonant magnetic perturbations in DIII-Da)
http://aip.metastore.ingenta.com/content/aip/journal/pop/19/5/10.1063/1.4718316
10.1063/1.4718316
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