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. ISSN 0031-9007

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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 > Physics
Journal or Publication Title:	Physical Review Letters
Publisher:	American Physical Society
ISSN:	0031-9007
Official Date:	27 March 2009
Volume:	Vol.102
Number:	No.12
Number of Pages:	4
Page Range:	Article no. 125001
Identification Number:	10.1103/PhysRevLett.102.125001
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
URI:	http://wrap.warwick.ac.uk/id/eprint/28190

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