Toroidal rotation braking with n = 1 magnetic perturbation field on JET

Y. Sun; Y. Liang; H. R. Koslowski; S. Jachmich; A. Alfier; O. Asunta; G. Corrigan; C. Giroud; M. P. Gryaznevich; D. Harting; T. Hender; E. Nardon; V. Naulin; V. Parail; T. Tala; C. Wiegmann; S. Wiesen

doi:10.1088/0741-3335/52/10/105007

Toroidal rotation braking with n = 1 magnetic perturbation field on JET

Y. Sun, Y. Liang, H. R. Koslowski, S. Jachmich, A. Alfier, O. Asunta, G. Corrigan, C. Giroud, M. P. Gryaznevich, D. Harting, T. Hender, E. Nardon, V. Naulin, V. Parail, T. Tala, C. Wiegmann, S. Wiesen

Laboratory for Plasma Physics

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Abstract

Astrong toroidal rotation braking has been observed in plasmas with application of an n = 1 magnetic perturbation field on the JET tokamak. Calculation results from the momentum transport analysis show that the torque induced by the n = 1 perturbation field has a global profile. The maximal value of this torque is at the plasma core region (? < 0.4) and it is about half of the neutral beam injection torque. The calculation shows that the plasma is mainly in the ? -√ ? regime in the plasma core, but it is close to the transition between the 1/? and ? -√ ? regimes. The neoclassical toroidal viscosity (NTV) torque in the 1/? and ? -√ ? regimes is calculated. The observed torque is of a magnitude in between that of the NTV torque in the 1/? and ? -√ ? regimes. The NTV torque in the ? -√ ? regimes is enhanced using the Lagrangian variation of the magnetic field strength. However, it is still smaller than the observed torque by one order of magnitude.

Original language	English
Article number	105007
Journal	Plasma Physics and Controlled Fusion
Volume	52
Issue number	10
DOIs	https://doi.org/10.1088/0741-3335/52/10/105007
Publication status	Published - Oct 2010

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Sun, Y., Liang, Y., Koslowski, H. R., Jachmich, S., Alfier, A., Asunta, O., Corrigan, G., Giroud, C., Gryaznevich, M. P., Harting, D., Hender, T., Nardon, E., Naulin, V., Parail, V., Tala, T., Wiegmann, C., & Wiesen, S. (2010). Toroidal rotation braking with n = 1 magnetic perturbation field on JET. Plasma Physics and Controlled Fusion, 52(10), Article 105007. https://doi.org/10.1088/0741-3335/52/10/105007

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title = "Toroidal rotation braking with n = 1 magnetic perturbation field on JET",

abstract = "Astrong toroidal rotation braking has been observed in plasmas with application of an n = 1 magnetic perturbation field on the JET tokamak. Calculation results from the momentum transport analysis show that the torque induced by the n = 1 perturbation field has a global profile. The maximal value of this torque is at the plasma core region (? < 0.4) and it is about half of the neutral beam injection torque. The calculation shows that the plasma is mainly in the ? -√ ? regime in the plasma core, but it is close to the transition between the 1/? and ? -√ ? regimes. The neoclassical toroidal viscosity (NTV) torque in the 1/? and ? -√ ? regimes is calculated. The observed torque is of a magnitude in between that of the NTV torque in the 1/? and ? -√ ? regimes. The NTV torque in the ? -√ ? regimes is enhanced using the Lagrangian variation of the magnetic field strength. However, it is still smaller than the observed torque by one order of magnitude.",

author = "Y. Sun and Y. Liang and Koslowski, {H. R.} and S. Jachmich and A. Alfier and O. Asunta and G. Corrigan and C. Giroud and Gryaznevich, {M. P.} and D. Harting and T. Hender and E. Nardon and V. Naulin and V. Parail and T. Tala and C. Wiegmann and S. Wiesen",

year = "2010",

month = oct,

doi = "10.1088/0741-3335/52/10/105007",

language = "English",

volume = "52",

journal = "Plasma Physics and Controlled Fusion",

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number = "10",

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Sun, Y, Liang, Y, Koslowski, HR, Jachmich, S, Alfier, A, Asunta, O, Corrigan, G, Giroud, C, Gryaznevich, MP, Harting, D, Hender, T, Nardon, E, Naulin, V, Parail, V, Tala, T, Wiegmann, C & Wiesen, S 2010, 'Toroidal rotation braking with n = 1 magnetic perturbation field on JET', Plasma Physics and Controlled Fusion, vol. 52, no. 10, 105007. https://doi.org/10.1088/0741-3335/52/10/105007

TY - JOUR

T1 - Toroidal rotation braking with n = 1 magnetic perturbation field on JET

AU - Sun, Y.

AU - Liang, Y.

AU - Koslowski, H. R.

AU - Jachmich, S.

AU - Alfier, A.

AU - Asunta, O.

AU - Corrigan, G.

AU - Giroud, C.

AU - Gryaznevich, M. P.

AU - Harting, D.

AU - Hender, T.

AU - Nardon, E.

AU - Naulin, V.

AU - Parail, V.

AU - Tala, T.

AU - Wiegmann, C.

AU - Wiesen, S.

PY - 2010/10

Y1 - 2010/10

N2 - Astrong toroidal rotation braking has been observed in plasmas with application of an n = 1 magnetic perturbation field on the JET tokamak. Calculation results from the momentum transport analysis show that the torque induced by the n = 1 perturbation field has a global profile. The maximal value of this torque is at the plasma core region (? < 0.4) and it is about half of the neutral beam injection torque. The calculation shows that the plasma is mainly in the ? -√ ? regime in the plasma core, but it is close to the transition between the 1/? and ? -√ ? regimes. The neoclassical toroidal viscosity (NTV) torque in the 1/? and ? -√ ? regimes is calculated. The observed torque is of a magnitude in between that of the NTV torque in the 1/? and ? -√ ? regimes. The NTV torque in the ? -√ ? regimes is enhanced using the Lagrangian variation of the magnetic field strength. However, it is still smaller than the observed torque by one order of magnitude.

AB - Astrong toroidal rotation braking has been observed in plasmas with application of an n = 1 magnetic perturbation field on the JET tokamak. Calculation results from the momentum transport analysis show that the torque induced by the n = 1 perturbation field has a global profile. The maximal value of this torque is at the plasma core region (? < 0.4) and it is about half of the neutral beam injection torque. The calculation shows that the plasma is mainly in the ? -√ ? regime in the plasma core, but it is close to the transition between the 1/? and ? -√ ? regimes. The neoclassical toroidal viscosity (NTV) torque in the 1/? and ? -√ ? regimes is calculated. The observed torque is of a magnitude in between that of the NTV torque in the 1/? and ? -√ ? regimes. The NTV torque in the ? -√ ? regimes is enhanced using the Lagrangian variation of the magnetic field strength. However, it is still smaller than the observed torque by one order of magnitude.

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SN - 0741-3335

VL - 52

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

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ER -

Toroidal rotation braking with n = 1 magnetic perturbation field on JET

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