Scalings of Spontaneous Rotation in the JET Tokamak

M.F.F. Nave, L.-G. Eriksson, C. Giroud, J.S. de Grassie, T. Hellsten, T. Johnson, Y. Lin, J. Mailloux, P. Mantica, M.-L. Mayoral, F.I. Parra, J. Ongena, Tuomas Tala, J.H.F. Severo, P.C. de Vries, JET-EFDA Contributors

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Abstract

This paper summarises and highlights experimental results from recent JET studies on intrinsic rotation [1-4]. Levels of intrinsic rotation measured in JET H-modes are generally lower than expected from scaling laws for co-current rotating plasmas that predict that rotation increases with normalised beta [5]. Both coand counter-current is observed and there aren’t significant differences between rotation observed in L-mode and H-mode plasmas. Experimentally several factors have been found to influence intrinsic rotation, such as fast ion losses and toroidal field ripple, suggesting that different physics mechanisms are at play to drive intrinsic rotation and that these should be taken into consideration when extrapolating to future devices. It is also apparent from JET data that independent mechanisms may be driving rotation in the edge and the plasma core. Toroidal field ripple, in particular, was found to have a significant effect on the intrinsic rotation of plasmas without momentum input. JET results suggest that ITER intrinsic rotation may be substantially less than what was previously predicted by the multi-machine rotation scaling of ref. [5].
Original languageEnglish
Title of host publicationProgramme, Abstracts, Presentations & Proceedings
Subtitle of host publication24th IAEA Fusion Energy Conference, October 8-13, 2012, San Diego, USA
PublisherInternational Atomic Energy Agency IAEA
Publication statusPublished - 2012
MoE publication typeA4 Article in a conference publication
Event24th IAEA Fusion Energy Conference - San Diego, United States
Duration: 8 Oct 201213 Oct 2012
http://www-naweb.iaea.org/napc/physics/FEC/FEC2012/html/proceedings.pdf (Full proceedings)

Conference

Conference24th IAEA Fusion Energy Conference
CountryUnited States
CitySan Diego
Period8/10/1213/10/12
Internet address

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Cite this

Nave, M. F. F., Eriksson, L-G., Giroud, C., de Grassie, J. S., Hellsten, T., Johnson, T., Lin, Y., Mailloux, J., Mantica, P., Mayoral, M-L., Parra, F. I., Ongena, J., Tala, T., Severo, J. H. F., de Vries, P. C., & Contributors, JET-EFDA. (2012). Scalings of Spontaneous Rotation in the JET Tokamak. In Programme, Abstracts, Presentations & Proceedings: 24th IAEA Fusion Energy Conference, October 8-13, 2012, San Diego, USA [EX/P3-31] International Atomic Energy Agency IAEA. http://www-naweb.iaea.org/napc/physics/FEC/FEC2012/papers/582_EXP331.pdf