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Transport of parallel momentum induced by current-symmetry breaking in toroidal plasmas

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Camenen, Y., Peeters, A. G., Angioni, C., Casson, F. J. (Francis James), Hornsby, W. A., Snodin, A. P. and Strintzi, D. (2009) Transport of parallel momentum induced by current-symmetry breaking in toroidal plasmas. Physical Review Letters, Vol.102 (No.12). Article no. 125001. doi:10.1103/PhysRevLett.102.125001 ISSN 0031-9007.

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.102.125001

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Abstract

The symmetry of a physical system strongly impacts on its properties. In toroidal plasmas, the symmetry along a magnetic field line usually constrains the radial flux of parallel momentum to zero in the absence of background flows. By breaking the up-down symmetry of the toroidal currents, this constraint can be relaxed. The parallel asymmetry in the magnetic configuration then leads to an incomplete cancellation of the turbulent momentum flux across a flux surface. The magnitude of the subsequent toroidal rotation increases with the up-down asymmetry and its sign depends on the direction of the toroidal magnetic field and plasma current. Such a mechanism offers new insights in the interpretation and control of the intrinsic toroidal rotation in present day experiments.

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: 27 March 2009
Dates:
DateEvent
27 March 2009Published
Volume: Vol.102
Number: No.12
Number of Pages: 4
Page Range: Article no. 125001
DOI: 10.1103/PhysRevLett.102.125001
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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