Influence of magnetic field ripple on the intrinsic rotation of tokamak plasmas

M. F. F. Nave, T. Johnson, L.-G. Eriksson, K. Crombé, C. Giroud, M.-L. Mayoral, J. Ongena, Antti Salmi, Tuomas Tala, M. Tsalas

Research output: Contribution to journalArticleScientificpeer-review

26 Citations (Scopus)

Abstract

Using the unique capability of JET to monotonically change the amplitude of the magnetic field ripple, without modifying other relevant equilibrium conditions, the effect of the ripple on the angular rotation frequency of the plasma column was investigated under the conditions of no external momentum input. The ripple amplitude was varied from 0.08% to 1.5% in Ohmic and ion-cyclotron radio-frequency (ICRF) heated plasmas. In both cases the ripple causes counterrotation, indicating a strong torque due to nonambipolar transport of thermal ions and in the case of ICRF also fast ions.
Original languageEnglish
Article number105005
Number of pages4
JournalPhysical Review Letters
Volume105
Issue number10
DOIs
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed

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ripples
cyclotron frequency
magnetic fields
radio frequencies
ions
torque
momentum
causes

Keywords

  • plasma physics
  • fusion energy

Cite this

Nave, M. F. F., Johnson, T., Eriksson, L-G., Crombé, K., Giroud, C., Mayoral, M-L., ... Tsalas, M. (2010). Influence of magnetic field ripple on the intrinsic rotation of tokamak plasmas. Physical Review Letters, 105(10), [105005]. https://doi.org/10.1103/PhysRevLett.105.105005
Nave, M. F. F. ; Johnson, T. ; Eriksson, L.-G. ; Crombé, K. ; Giroud, C. ; Mayoral, M.-L. ; Ongena, J. ; Salmi, Antti ; Tala, Tuomas ; Tsalas, M. / Influence of magnetic field ripple on the intrinsic rotation of tokamak plasmas. In: Physical Review Letters. 2010 ; Vol. 105, No. 10.
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abstract = "Using the unique capability of JET to monotonically change the amplitude of the magnetic field ripple, without modifying other relevant equilibrium conditions, the effect of the ripple on the angular rotation frequency of the plasma column was investigated under the conditions of no external momentum input. The ripple amplitude was varied from 0.08{\%} to 1.5{\%} in Ohmic and ion-cyclotron radio-frequency (ICRF) heated plasmas. In both cases the ripple causes counterrotation, indicating a strong torque due to nonambipolar transport of thermal ions and in the case of ICRF also fast ions.",
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author = "Nave, {M. F. F.} and T. Johnson and L.-G. Eriksson and K. Cromb{\'e} and C. Giroud and M.-L. Mayoral and J. Ongena and Antti Salmi and Tuomas Tala and M. Tsalas",
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Nave, MFF, Johnson, T, Eriksson, L-G, Crombé, K, Giroud, C, Mayoral, M-L, Ongena, J, Salmi, A, Tala, T & Tsalas, M 2010, 'Influence of magnetic field ripple on the intrinsic rotation of tokamak plasmas', Physical Review Letters, vol. 105, no. 10, 105005. https://doi.org/10.1103/PhysRevLett.105.105005

Influence of magnetic field ripple on the intrinsic rotation of tokamak plasmas. / Nave, M. F. F.; Johnson, T.; Eriksson, L.-G.; Crombé, K.; Giroud, C.; Mayoral, M.-L.; Ongena, J.; Salmi, Antti; Tala, Tuomas; Tsalas, M.

In: Physical Review Letters, Vol. 105, No. 10, 105005, 2010.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Influence of magnetic field ripple on the intrinsic rotation of tokamak plasmas

AU - Nave, M. F. F.

AU - Johnson, T.

AU - Eriksson, L.-G.

AU - Crombé, K.

AU - Giroud, C.

AU - Mayoral, M.-L.

AU - Ongena, J.

AU - Salmi, Antti

AU - Tala, Tuomas

AU - Tsalas, M.

PY - 2010

Y1 - 2010

N2 - Using the unique capability of JET to monotonically change the amplitude of the magnetic field ripple, without modifying other relevant equilibrium conditions, the effect of the ripple on the angular rotation frequency of the plasma column was investigated under the conditions of no external momentum input. The ripple amplitude was varied from 0.08% to 1.5% in Ohmic and ion-cyclotron radio-frequency (ICRF) heated plasmas. In both cases the ripple causes counterrotation, indicating a strong torque due to nonambipolar transport of thermal ions and in the case of ICRF also fast ions.

AB - Using the unique capability of JET to monotonically change the amplitude of the magnetic field ripple, without modifying other relevant equilibrium conditions, the effect of the ripple on the angular rotation frequency of the plasma column was investigated under the conditions of no external momentum input. The ripple amplitude was varied from 0.08% to 1.5% in Ohmic and ion-cyclotron radio-frequency (ICRF) heated plasmas. In both cases the ripple causes counterrotation, indicating a strong torque due to nonambipolar transport of thermal ions and in the case of ICRF also fast ions.

KW - plasma physics

KW - fusion energy

U2 - 10.1103/PhysRevLett.105.105005

DO - 10.1103/PhysRevLett.105.105005

M3 - Article

VL - 105

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 10

M1 - 105005

ER -

Nave MFF, Johnson T, Eriksson L-G, Crombé K, Giroud C, Mayoral M-L et al. Influence of magnetic field ripple on the intrinsic rotation of tokamak plasmas. Physical Review Letters. 2010;105(10). 105005. https://doi.org/10.1103/PhysRevLett.105.105005