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The effects of sheared toroidal rotation on stability limits in tokamak plasmas
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Space Plasma Physics.
2011 (English)In: Plasma Physics and Controlled Fusion, ISSN 0741-3335, E-ISSN 1361-6587, Vol. 53, no 12, 125002- p.Article in journal (Refereed) Published
Abstract [en]

Sheared toroidal rotation is found to increase the ideal external kink stability limit, thought to be the ultimate performance limit in fusion tokamaks. However, at rotation speeds approaching a significant fraction of the Alfven speed, the toroidal rotation shear drives a Kelvin-Helmholtz-like global plasma instability. Optimizing the rotation profile to maximize the pressure before encountering external kink modes, but simultaneously avoiding flow-driven instabilities, can lead to a window of stability that might be attractive for operating future high-performance fusion devices such as a spherical tokamak component test facility.

Place, publisher, year, edition, pages
2011. Vol. 53, no 12, 125002- p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-168417DOI: 10.1088/0741-3335/53/12/125002ISI: 000298644000045OAI: oai:DiVA.org:uu-168417DiVA: diva2:499214
Available from: 2012-02-13 Created: 2012-02-10 Last updated: 2017-12-07Bibliographically approved

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Wahlberg, Christer

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