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Resonant magnetic perturbation penetration and locking threshold in EXTRAP T2R
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.ORCID iD: 0000-0002-9546-4494
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.ORCID iD: 0000-0002-5259-0458
2013 (English)In: 40th EPS Conference on Plasma Physics: Espoo, Finland, 1-5 July, 2013, 2013Conference paper, Published paper (Refereed)
Abstract [en]

In a tokamak or reversed field pinch plasma with rotating tearing modes (TM), the penetration of resonant magnetic perturbations (RMPs) and/or error-fields can lead to braking of the TM rotation velocity and eventually to wall locking of the TM. The TM rotation braking may occur via the electromagnetic torque that acts locally near the rational surface [1, 2, 3]. At a critical RMP amplitude, a transition from a fast rotating TM to a slowly rotating or wall locked TM occurs. This critical RMP amplitude is referred to as the error-field penetration threshold or the TM locking threshold. In this work, the threshold is experimentally studied in the EXTRAP T2R reversed-field pinch. The experimental results are compared with a model for the non-linear TM dynamics, which incorporates the balance between the electromagnetic braking torque and the viscous drag of the rotating plasma [3].

Place, publisher, year, edition, pages
2013.
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-136302Scopus ID: 2-s2.0-84905666692ISBN: 2-914771-84-3 (print)OAI: oai:DiVA.org:kth-136302DiVA: diva2:675741
Conference
40th EPS Conference on Plasma Physics; Espoo, Finland, 1-5 July, 2013
Note

QC 20140205

Available from: 2013-12-04 Created: 2013-12-04 Last updated: 2016-04-18Bibliographically approved

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Frassinetti, LorenzoBrunsell, Per

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