Current profile, MHD activity and transport properties of optimized shear plasmas in JET

Y.F. Baranov; B. Alper; G.A. Cottrell; D.V. Bartlett; C.D. Challis; G.D. Conway; N. Deliyanakis; C. Gormezano; G.T.A. Huysmans; X. Litaudon; V.V. Parail; A.C.C. Sips; P. Smeulders; F.X. Söldner; B.J.D. Tubbing; M.G. von Hellermann; D.J. Ward

doi:10.1088/0029-5515/39/10/308

Current profile, MHD activity and transport properties of optimized shear plasmas in JET

Y.F. Baranov, B. Alper, G.A. Cottrell, D.V. Bartlett, C.D. Challis, G.D. Conway, N. Deliyanakis, C. Gormezano, G.T.A. Huysmans, X. Litaudon, V.V. Parail, A.C.C. Sips, P. Smeulders, F.X. Söldner, B.J.D. Tubbing, M.G. von Hellermann, D.J. Ward

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

17 Citations (Scopus)

Abstract

High fusion performance has been achieved in optimized shear discharges in JET with the early appearance of internal transport barriers (ITBs) in the high power phase in both DD and DT plasmas. An ITB has been produced in a large variety of conditions, including LHCD only, ICRH only, NBI only and NBI + ICRH with LHCD preheat. An ITB may coexist with the edge barrier. The high pressure gradient produced by ICRH combined with high power NBI heating starting in a low density plasma with q(0) approx 1.5-2 is the main prerequisite for an efficient ITB in high performance discharges. Strong coupling between q profiles, MHD activity, energy confinement and fusion yield has been observed. The transition from L to H mode can be triggered by MHD events. The transition is accompanied by significant momentary changes in the density fluctuation spectrum in the peripheral plasma. The ITB may persist for some time in both ELM-free and ELMy H mode.

Original language	English
Pages (from-to)	1463-1480
Journal	Nuclear Fusion
Volume	39
Issue number	10
DOIs	https://doi.org/10.1088/0029-5515/39/10/308
Publication status	Published - 1 Oct 1999
Externally published	Yes

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10.1088/0029-5515/39/10/308

http://adsabs.harvard.edu/abs/1999NucFu..39.1463B

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Baranov, Y. F., Alper, B., Cottrell, G. A., Bartlett, D. V., Challis, C. D., Conway, G. D., Deliyanakis, N., Gormezano, C., Huysmans, G. T. A., Litaudon, X., Parail, V. V., Sips, A. C. C., Smeulders, P., Söldner, F. X., Tubbing, B. J. D., von Hellermann, M. G., & Ward, D. J. (1999). Current profile, MHD activity and transport properties of optimized shear plasmas in JET. Nuclear Fusion, 39(10), 1463-1480. https://doi.org/10.1088/0029-5515/39/10/308

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title = "Current profile, MHD activity and transport properties of optimized shear plasmas in JET",

abstract = "High fusion performance has been achieved in optimized shear discharges in JET with the early appearance of internal transport barriers (ITBs) in the high power phase in both DD and DT plasmas. An ITB has been produced in a large variety of conditions, including LHCD only, ICRH only, NBI only and NBI + ICRH with LHCD preheat. An ITB may coexist with the edge barrier. The high pressure gradient produced by ICRH combined with high power NBI heating starting in a low density plasma with q(0) approx 1.5-2 is the main prerequisite for an efficient ITB in high performance discharges. Strong coupling between q profiles, MHD activity, energy confinement and fusion yield has been observed. The transition from L to H mode can be triggered by MHD events. The transition is accompanied by significant momentary changes in the density fluctuation spectrum in the peripheral plasma. The ITB may persist for some time in both ELM-free and ELMy H mode.",

author = "Y.F. Baranov and B. Alper and G.A. Cottrell and D.V. Bartlett and C.D. Challis and G.D. Conway and N. Deliyanakis and C. Gormezano and G.T.A. Huysmans and X. Litaudon and V.V. Parail and A.C.C. Sips and P. Smeulders and F.X. S{\"o}ldner and B.J.D. Tubbing and {von Hellermann}, M.G. and D.J. Ward",

year = "1999",

month = oct,

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doi = "10.1088/0029-5515/39/10/308",

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Baranov, YF, Alper, B, Cottrell, GA, Bartlett, DV, Challis, CD, Conway, GD, Deliyanakis, N, Gormezano, C, Huysmans, GTA, Litaudon, X, Parail, VV, Sips, ACC, Smeulders, P, Söldner, FX, Tubbing, BJD, von Hellermann, MG & Ward, DJ 1999, 'Current profile, MHD activity and transport properties of optimized shear plasmas in JET', Nuclear Fusion, vol. 39, no. 10, pp. 1463-1480. https://doi.org/10.1088/0029-5515/39/10/308

TY - JOUR

T1 - Current profile, MHD activity and transport properties of optimized shear plasmas in JET

AU - Baranov, Y.F.

AU - Alper, B.

AU - Cottrell, G.A.

AU - Bartlett, D.V.

AU - Challis, C.D.

AU - Conway, G.D.

AU - Deliyanakis, N.

AU - Gormezano, C.

AU - Huysmans, G.T.A.

AU - Litaudon, X.

AU - Parail, V.V.

AU - Sips, A.C.C.

AU - Smeulders, P.

AU - Söldner, F.X.

AU - Tubbing, B.J.D.

AU - von Hellermann, M.G.

AU - Ward, D.J.

PY - 1999/10/1

Y1 - 1999/10/1

N2 - High fusion performance has been achieved in optimized shear discharges in JET with the early appearance of internal transport barriers (ITBs) in the high power phase in both DD and DT plasmas. An ITB has been produced in a large variety of conditions, including LHCD only, ICRH only, NBI only and NBI + ICRH with LHCD preheat. An ITB may coexist with the edge barrier. The high pressure gradient produced by ICRH combined with high power NBI heating starting in a low density plasma with q(0) approx 1.5-2 is the main prerequisite for an efficient ITB in high performance discharges. Strong coupling between q profiles, MHD activity, energy confinement and fusion yield has been observed. The transition from L to H mode can be triggered by MHD events. The transition is accompanied by significant momentary changes in the density fluctuation spectrum in the peripheral plasma. The ITB may persist for some time in both ELM-free and ELMy H mode.

AB - High fusion performance has been achieved in optimized shear discharges in JET with the early appearance of internal transport barriers (ITBs) in the high power phase in both DD and DT plasmas. An ITB has been produced in a large variety of conditions, including LHCD only, ICRH only, NBI only and NBI + ICRH with LHCD preheat. An ITB may coexist with the edge barrier. The high pressure gradient produced by ICRH combined with high power NBI heating starting in a low density plasma with q(0) approx 1.5-2 is the main prerequisite for an efficient ITB in high performance discharges. Strong coupling between q profiles, MHD activity, energy confinement and fusion yield has been observed. The transition from L to H mode can be triggered by MHD events. The transition is accompanied by significant momentary changes in the density fluctuation spectrum in the peripheral plasma. The ITB may persist for some time in both ELM-free and ELMy H mode.

U2 - 10.1088/0029-5515/39/10/308

DO - 10.1088/0029-5515/39/10/308

M3 - Article

SN - 0029-5515

VL - 39

SP - 1463

EP - 1480

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 10

ER -

Current profile, MHD activity and transport properties of optimized shear plasmas in JET

Abstract

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