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Experimental evidence of momentum transport induced by an up-down asymmetric magnetic equilibrium in toroidal plasmas

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Camenen, Y., Bortolon, A., Duval, B. P., Federspiel, L., Peeters, A. G., Casson, F. J. (Francis James), Hornsby, W. A., Karpushov, A. N., Piras, F., Sauter, O., Snodin, A. P. and Szepesi, Gabor (2010) Experimental evidence of momentum transport induced by an up-down asymmetric magnetic equilibrium in toroidal plasmas. Physical Review Letters, Vol.105 (No.13). doi:10.1103/PhysRevLett.105.135003 ISSN 0031-9007.

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.105.135003

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Abstract

The first experimental evidence of parallel momentum transport generated by the up-down asymmetry of a toroidal plasma is reported. The experiments, conducted in the Tokamak a Configuration Variable, were motivated by the recent theoretical discovery of ion-scale turbulent momentum transport induced by an up-down asymmetry in the magnetic equilibrium. The toroidal rotation gradient is observed to depend on the asymmetry in the outer part of the plasma leading to a variation of the central rotation by a factor of 1.5-2. The direction of the effect and its magnitude are in agreement with theoretical predictions for the eight possible combinations of plasma asymmetry, current, and magnetic field.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
ISSN: 0031-9007
Official Date: 22 September 2010
Dates:
DateEvent
22 September 2010Published
Volume: Vol.105
Number: No.13
Number of Pages: 4
DOI: 10.1103/PhysRevLett.105.135003
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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