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Effect of toroidal field ripple on the formation of internal transport barriers
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2008 (English)In: Plasma Physics and Controlled Fusion, ISSN 0741-3335, E-ISSN 1361-6587, Vol. 50, no 6Article in journal (Refereed) Published
Abstract [en]

The effect of a toroidal field (TF) ripple on the formation and performance of internal transport barriers (ITBs) has been studied in JET. It was found that the TF ripple had a profound effect on the toroidal plasma rotation. An increased TF ripple up to delta = 1% led to a lower rotation and reduced the rotational shear in the region where the ITBs were formed. ITB triggering events were observed in all cases and it is thought that the rotational shear may be less important for this process than, for example, the q-profile. However, the increase in the pressure gradient following the ITB trigger was reduced in discharges with a larger TF ripple and consequently a lower rotational shear. This suggests that toroidal rotation and its shear play a role in the growth of the ITB once it has been triggered.

Place, publisher, year, edition, pages
2008. Vol. 50, no 6
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URN: urn:nbn:se:kth:diva-17586DOI: 10.1088/0741-3335/50/6/065008ISI: 000256544000009Scopus ID: 2-s2.0-45749128591OAI: oai:DiVA.org:kth-17586DiVA: diva2:335630
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Brzozowski, Jerzy H.
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