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Experimental demonstration of an up-down asymmetry effect on intrinsic rotation in the TCV tokamak
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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, G. (2010) Experimental demonstration of an up-down asymmetry effect on intrinsic rotation in the TCV tokamak. In: 37th European-Physical-Society-Conference-on-Plasma-Physics, Univ Campus, Helix Arts Ctr, Dublin, Ireland, June 22-25, 2010. Published in: Plasma Physics and Controlled Fusion, Vol.52 (No.12). Article: 124037 . doi:10.1088/0741-3335/52/12/124037 ISSN 0741-3335.
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Official URL: http://dx.doi.org/10.1088/0741-3335/52/12/124037
Abstract
A new mechanism has recently been proposed that generates a radial flux of parallel momentum in toroidal plasmas. Namely, by considering up-down asymmetric flux surfaces, the symmetry following the magnetic field can be broken and an additional contribution to the turbulent momentum flux arises, potentially changing the intrinsic rotation profile. These predictions are tested with specific experiments on TCV. The intrinsic toroidal rotation is observed to change by roughly a factor of two when changing the up-down asymmetry of the plasma. More precisely, the toroidal rotation gradient changes in the outer part of the plasma, where the flux surface asymmetry is the highest. The experiments were performed for all combinations of the toroidal magnetic field and plasma current directions, that affect the sign of the predicted up-down asymmetry flux. In each case the variation of the intrinsic rotation profile with the up-down asymmetry is observed in the direction predicted by the theory.
| Item Type: | Conference Item (UNSPECIFIED) | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | Plasma Physics and Controlled Fusion | ||||
| Publisher: | Institute of Physics Publishing Ltd. | ||||
| ISSN: | 0741-3335 | ||||
| Official Date: | December 2010 | ||||
| Dates: |
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| Volume: | Vol.52 | ||||
| Number: | No.12 | ||||
| Number of Pages: | 13 | ||||
| Page Range: | Article: 124037 | ||||
| DOI: | 10.1088/0741-3335/52/12/124037 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Title of Event: | 37th European-Physical-Society-Conference-on-Plasma-Physics | ||||
| Type of Event: | Conference | ||||
| Location of Event: | Univ Campus, Helix Arts Ctr, Dublin, Ireland | ||||
| Date(s) of Event: | June 22-25, 2010 |
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