Momentum transport studies in JET H-mode discharges with an enhanced toroidal field ripple

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Momentum transport studies in JET H-mode discharges with an enhanced toroidal field ripple. / De Vries, P. C.; Versloot, T. W.; Salmi, A.; Hua, M. D.; Howell, D. H.; Giroud, C.; Parail, V.; Saibene, G.; Tala, T.

In: Plasma Physics and Controlled Fusion, Vol. 52, No. 6, 065004, 21.05.2010.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

De Vries, PC, Versloot, TW, Salmi, A, Hua, MD, Howell, DH, Giroud, C, Parail, V, Saibene, G & Tala, T 2010, 'Momentum transport studies in JET H-mode discharges with an enhanced toroidal field ripple' Plasma Physics and Controlled Fusion, vol. 52, no. 6, 065004. https://doi.org/10.1088/0741-3335/52/6/065004

APA

De Vries, P. C., Versloot, T. W., Salmi, A., Hua, M. D., Howell, D. H., Giroud, C., ... Tala, T. (2010). Momentum transport studies in JET H-mode discharges with an enhanced toroidal field ripple. Plasma Physics and Controlled Fusion, 52(6), [065004]. https://doi.org/10.1088/0741-3335/52/6/065004

Vancouver

Author

De Vries, P. C. ; Versloot, T. W. ; Salmi, A. ; Hua, M. D. ; Howell, D. H. ; Giroud, C. ; Parail, V. ; Saibene, G. ; Tala, T. / Momentum transport studies in JET H-mode discharges with an enhanced toroidal field ripple. In: Plasma Physics and Controlled Fusion. 2010 ; Vol. 52, No. 6.

Bibtex - Download

@article{5b8d6fe6775a4214bc44c57aa7507849,
title = "Momentum transport studies in JET H-mode discharges with an enhanced toroidal field ripple",
abstract = "In this study, enhancement of the toroidal field (TF) ripple has been used as a tool in order to reveal the impact of the momentum pinch on the rotation profiles in H-mode JET discharges. The analysis showed that flatter rotation profiles were obtained in discharges with a high TF ripple, attributed to a smaller inward momentum convection. An average inward momentum pinch of approximately Vp ≈ 3.4 m s-1 and a normalized pinch value of RVp/χ ≈ 6.6 could explain the observation. The data show that the momentum at the edge affects the peaking of the rotation and momentum density profiles. Under the assumption that the heat and momentum diffusivities are equal, an estimate of the levels of the momentum pinch in all discharges in the JET rotation database was made. For H-mode discharge these ranged from 0.3 m s-1 < Vp < 17 m s-1, with 2 < RVp/χ < 10. A larger momentum pinch was found in discharges with a smaller density profile gradient length, i.e. a more peaked density profile.",
author = "{De Vries}, {P. C.} and Versloot, {T. W.} and A. Salmi and Hua, {M. D.} and Howell, {D. H.} and C. Giroud and V. Parail and G. Saibene and T. Tala",
year = "2010",
month = "5",
day = "21",
doi = "10.1088/0741-3335/52/6/065004",
language = "English",
volume = "52",
journal = "Plasma Physics and Controlled Fusion",
issn = "0741-3335",
number = "6",

}

RIS - Download

TY - JOUR

T1 - Momentum transport studies in JET H-mode discharges with an enhanced toroidal field ripple

AU - De Vries, P. C.

AU - Versloot, T. W.

AU - Salmi, A.

AU - Hua, M. D.

AU - Howell, D. H.

AU - Giroud, C.

AU - Parail, V.

AU - Saibene, G.

AU - Tala, T.

PY - 2010/5/21

Y1 - 2010/5/21

N2 - In this study, enhancement of the toroidal field (TF) ripple has been used as a tool in order to reveal the impact of the momentum pinch on the rotation profiles in H-mode JET discharges. The analysis showed that flatter rotation profiles were obtained in discharges with a high TF ripple, attributed to a smaller inward momentum convection. An average inward momentum pinch of approximately Vp ≈ 3.4 m s-1 and a normalized pinch value of RVp/χ ≈ 6.6 could explain the observation. The data show that the momentum at the edge affects the peaking of the rotation and momentum density profiles. Under the assumption that the heat and momentum diffusivities are equal, an estimate of the levels of the momentum pinch in all discharges in the JET rotation database was made. For H-mode discharge these ranged from 0.3 m s-1 < Vp < 17 m s-1, with 2 < RVp/χ < 10. A larger momentum pinch was found in discharges with a smaller density profile gradient length, i.e. a more peaked density profile.

AB - In this study, enhancement of the toroidal field (TF) ripple has been used as a tool in order to reveal the impact of the momentum pinch on the rotation profiles in H-mode JET discharges. The analysis showed that flatter rotation profiles were obtained in discharges with a high TF ripple, attributed to a smaller inward momentum convection. An average inward momentum pinch of approximately Vp ≈ 3.4 m s-1 and a normalized pinch value of RVp/χ ≈ 6.6 could explain the observation. The data show that the momentum at the edge affects the peaking of the rotation and momentum density profiles. Under the assumption that the heat and momentum diffusivities are equal, an estimate of the levels of the momentum pinch in all discharges in the JET rotation database was made. For H-mode discharge these ranged from 0.3 m s-1 < Vp < 17 m s-1, with 2 < RVp/χ < 10. A larger momentum pinch was found in discharges with a smaller density profile gradient length, i.e. a more peaked density profile.

UR - http://www.scopus.com/inward/record.url?scp=77952376118&partnerID=8YFLogxK

U2 - 10.1088/0741-3335/52/6/065004

DO - 10.1088/0741-3335/52/6/065004

M3 - Article

VL - 52

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

SN - 0741-3335

IS - 6

M1 - 065004

ER -

ID: 26682973