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

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, Antti Salmi, Tuomas Tala, M. Tsalas

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

34 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 language	English
Article number	105005
Number of pages	4
Journal	Physical Review Letters
Volume	105
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevLett.105.105005
Publication status	Published - 2010
MoE publication type	A1 Journal article-refereed

Keywords

plasma physics
fusion energy

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10.1103/PhysRevLett.105.105005

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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.",

keywords = "plasma physics, fusion energy",

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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doi = "10.1103/PhysRevLett.105.105005",

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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, 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

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

Abstract

Keywords

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