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

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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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scaling
ripples
rotating plasmas
scaling laws
counters
momentum
physics
ions

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Nave, M. F. F., Eriksson, L-G., Giroud, C., de Grassie, J. S., Hellsten, T., Johnson, T., ... 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.
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, Tuomas ; Severo, J.H.F. ; de Vries, P.C. ; Contributors, JET-EFDA. / Scalings of Spontaneous Rotation in the JET Tokamak. Programme, Abstracts, Presentations & Proceedings: 24th IAEA Fusion Energy Conference, October 8-13, 2012, San Diego, USA. International Atomic Energy Agency IAEA, 2012.
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title = "Scalings of Spontaneous Rotation in the JET Tokamak",
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].",
author = "M.F.F. Nave and L.-G. Eriksson and C. Giroud and {de Grassie}, J.S. and T. Hellsten and T. Johnson and Y. Lin and J. Mailloux and P. Mantica and M.-L. Mayoral and F.I. Parra and J. Ongena and Tuomas Tala and J.H.F. Severo and {de Vries}, P.C. and JET-EFDA Contributors",
year = "2012",
language = "English",
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Nave, MFF, Eriksson, L-G, Giroud, C, de Grassie, JS, Hellsten, T, Johnson, T, Lin, Y, Mailloux, J, Mantica, P, Mayoral, M-L, Parra, FI, Ongena, J, Tala, T, Severo, JHF, de Vries, PC & 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, 24th IAEA Fusion Energy Conference, San Diego, United States, 8/10/12.

Scalings of Spontaneous Rotation in the JET Tokamak. / 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, Tuomas; Severo, J.H.F.; de Vries, P.C.; Contributors, JET-EFDA.

Programme, Abstracts, Presentations & Proceedings: 24th IAEA Fusion Energy Conference, October 8-13, 2012, San Diego, USA. International Atomic Energy Agency IAEA, 2012. EX/P3-31.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

TY - GEN

T1 - Scalings of Spontaneous Rotation in the JET Tokamak

AU - Nave, M.F.F.

AU - Eriksson, L.-G.

AU - Giroud, C.

AU - de Grassie, J.S.

AU - Hellsten, T.

AU - Johnson, T.

AU - Lin, Y.

AU - Mailloux, J.

AU - Mantica, P.

AU - Mayoral, M.-L.

AU - Parra, F.I.

AU - Ongena, J.

AU - Tala, Tuomas

AU - Severo, J.H.F.

AU - de Vries, P.C.

AU - Contributors, JET-EFDA

PY - 2012

Y1 - 2012

N2 - 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].

AB - 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].

M3 - Conference article in proceedings

BT - Programme, Abstracts, Presentations & Proceedings

PB - International Atomic Energy Agency IAEA

ER -

Nave MFF, Eriksson L-G, Giroud C, de Grassie JS, Hellsten T, Johnson T et al. 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. International Atomic Energy Agency IAEA. 2012. EX/P3-31