Shearless transport barriers in magnetically confined plasmas
- Caldas, Ibere Luiz
- Viana, Ricardo Luiz
- Abud, Celso Vieira
- Fonseca, Júlio César David da
- Guimarães Filho, Zwinglio de Oliveira
- Kroetz, Tiago
- Marcus, Francisco Alberto
- Schelin, Adriane Beatriz
- Szezech Junior, Jose Danilo
- Toufen, Dennis Lozano
- Benkadda, S.
- Lopes, Sergio Roberto
- Morrison, Philip James
- Roberto, Marisa
- Gentle, K.
- Kuznetsov, Yurii
- Nascimento, Ivan Cunha
Publication date
January 2012
DOI Publisher
BRISTOL ISSN
0741-3335 Journal
0741-3335 Citation count (estimate)
5Abstract
Shearless transport barriers appear in confined plasmas due to non-monotonic radial profiles and cause localized reduction of transport even after they have been broken. In this paper we summarize our recent theoretical and experimental research on shearless transport barriers in plasmas confined in toroidal devices. In particular, we discuss shearless barriers in Lagrangian magnetic field line transport caused by non-monotonic safety factor profiles. We also discuss evidence of particle transport barriers found in the TCABR Tokamak (University of Sao Paulo) and the Texas Helimak (University of Texas at Austin) in biased discharges with non-monotonic plasma flows.US Department of Energy [DE-FG05-80ET-53088
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