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Braking due to non-resonant magnetic perturbations and comparison with neoclassical toroidal viscosity torque 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.
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2015 (English)In: Nuclear Fusion, ISSN 0029-5515, E-ISSN 1741-4326, Vol. 55, no 11, 112003Article in journal (Refereed) PublishedText
Abstract [en]

The non-resonant magnetic perturbation (MP) braking is studied in the EXTRAP T2R reversed-field pinch (RFP) and the experimental braking torque is compared with the torque expected by the neoclassical toroidal viscosity (NTV) theory. The EXTRAP T2R active coils can apply magnetic perturbations with a single harmonic, either resonant or non-resonant. The non-resonant MP produces velocity braking with an experimental torque that affects a large part of the core region. The experimental torque is clearly related to the plasma displacement, consistent with a quadratic dependence as expected by the NTV theory. The work show a good qualitative agreement between the experimental torque in a RFP machine and NTV torque concerning both the torque density radial profile and the dependence on the non-resonant MP harmonic.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2015. Vol. 55, no 11, 112003
Keyword [en]
NTV, RMP, RFP, braking, EXTRAP T2R, MP
National Category
Fusion, Plasma and Space Physics
URN: urn:nbn:se:kth:diva-180517DOI: 10.1088/0029-5515/55/11/112003ISI: 000366528700003ScopusID: 2-s2.0-84946019106OAI: diva2:895039

QC 20160118

Available from: 2016-01-18 Created: 2016-01-14 Last updated: 2016-01-18Bibliographically approved

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Frassinetti, LorenzoFridström, RichardMenmuir, SheenaBrunsell, Per R.Drake, James Robert
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