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; Volker 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, Volker Naulin, V Parail, T Tala, C Wiegmann, S Wiesen

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

A strong 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 (ρ <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/ν and regimes. The neoclassical toroidal viscosity (NTV) torque in the 1/ν and regimes is calculated. The observed torque is of a magnitude in between that of the NTV torque in the 1/ν 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
Journal	Plasma Physics and Controlled Fusion
Volume	52
Issue number	10
Pages (from-to)	105007
ISSN	0741-3335
DOIs	https://doi.org/10.1088/0741-3335/52/10/105007
Publication status	Published - 2010

Keywords

Fusion energy

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10.1088/0741-3335/52/10/105007

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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), 105007. https://doi.org/10.1088/0741-3335/52/10/105007

@article{60ec1294f89b432fa48419d0f6a0797b,

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

abstract = "A strong 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 (ρ <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/ν and regimes. The neoclassical toroidal viscosity (NTV) torque in the 1/ν and regimes is calculated. The observed torque is of a magnitude in between that of the NTV torque in the 1/ν 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.",

keywords = "Fusion energy, Fusionsenergiforskning, Fusionsenergi",

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 Volker Naulin and V Parail and T Tala and C Wiegmann and S Wiesen",

year = "2010",

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

language = "English",

volume = "52",

pages = "105007",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

publisher = "IOP Publishing",

number = "10",

}

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, pp. 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, Volker

AU - Parail, V

AU - Tala, T

AU - Wiegmann, C

AU - Wiesen, S

PY - 2010

Y1 - 2010

N2 - A strong 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 (ρ <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/ν and regimes. The neoclassical toroidal viscosity (NTV) torque in the 1/ν and regimes is calculated. The observed torque is of a magnitude in between that of the NTV torque in the 1/ν 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 - A strong 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 (ρ <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/ν and regimes. The neoclassical toroidal viscosity (NTV) torque in the 1/ν and regimes is calculated. The observed torque is of a magnitude in between that of the NTV torque in the 1/ν 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.

KW - Fusion energy

KW - Fusionsenergiforskning

KW - Fusionsenergi

U2 - 10.1088/0741-3335/52/10/105007

DO - 10.1088/0741-3335/52/10/105007

M3 - Journal article

SN - 0741-3335

VL - 52

SP - 105007

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 10

ER -

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

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