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; A. Salmi; T. Tala; M. Tsalas

doi:10.1103/PhysRevLett.105.105005

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, A. Salmi, T. Tala, M. Tsalas

Laboratory for Plasma Physics

Research output: Contribution to journal › Article › peer-review

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 language	English
Article number	105005
Journal	Physical Review Letters
Volume	105
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevLett.105.105005
Publication status	Published - 3 Sept 2010

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title = "Influence of magnetic field ripple on the intrinsic rotation of tokamak plasmas",

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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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, A.

AU - Tala, T.

AU - Tsalas, M.

PY - 2010/9/3

Y1 - 2010/9/3

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.

UR - https://www.scopus.com/pages/publications/77956325110

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DO - 10.1103/PhysRevLett.105.105005

M3 - Article

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SN - 0031-9007

VL - 105

JO - Physical Review Letters

JF - Physical Review Letters

IS - 10

M1 - 105005

ER -

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

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