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Improved particle confinement in transition from multiple-helicity to quasi-single-helicity regimes of a reversed-field pinch
Advanved insittute of Industrial Science and Technology (JAPAN). (Fusion Plasma Physics)ORCID iD: 0000-0002-9546-4494
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2006 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 97, no 17, 175001- p.Article in journal (Refereed) Published
Abstract [en]

The quasi-single-helicity (QSH) state of a reversed-field pinch (RFP) plasma is a regime in which the RFP configuration can be sustained by a dynamo produced mainly by a single tearing mode and in which a helical structure with well-defined magnetic flux surfaces arises. In this Letter, we show that spontaneous transitions to the QSH regime enhance the particle confinement. This improvement is originated by the simultaneous and cooperative action of the increase of the magnetic island and the reduction of the magnetic stochasticity.

Place, publisher, year, edition, pages
2006. Vol. 97, no 17, 175001- p.
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-71774DOI: 10.1103/PhysRevLett.97.175001ISI: 000241586800034OAI: oai:DiVA.org:kth-71774DiVA: diva2:486986
Note
QC 20120221Available from: 2012-01-31 Created: 2012-01-31 Last updated: 2017-12-08Bibliographically approved

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Frassinetti, Lorenzo

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