Effect of toroidal field ripple on the formation of internal transport barriers

被引：13

作者：

de Vries, P. C. ^{[1
]}

Joffrin, E. ^{[2
]}

Hawkes, N. C. ^{[1
]}

Litaudon, X. ^{[3
]}

Challis, C. D. ^{[1
]}

Andrew, Y. ^{[1
]}

Beurskens, M. ^{[1
]}

Brix, M. ^{[1
]}

Brzozowski, J. ^{[4
]}

Crombe, K. ^{[5
]}

Giroud, C. ^{[1
]}

Hobirk, J. ^{[6
]}

Johnson, T. ^{[4
]}

Lonnroth, J. ^{[7
]}

Salmi, A. ^{[7
]}

Tala, T. ^{[8
]}

Yavorskij, V. ^{[9
]}

Zastrow, K-D ^{[1
]}

机构：

[1] EURATOM, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

[2] EFDA JET CSU, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

[3] CEN Cadarache, DSM DFRC, Assoc EURATOM CEA, F-13108 St Paul Les Durance, France

[4] KTH, EES, Assoc EURATOM VR, Stockholm, Sweden

[5] Univ Ghent, Dept Appl Phys, Ghent, Belgium

[6] Max Planck Inst Plasma Phys, Euratom Assoc, D-85748 Garching, Germany

[7] Aalto Univ, Assoc Euratom Tekes, Helsinki 02015, Finland

[8] VTT, Assoc Euratom Tekes, Espoo 02044, Finland

[9] Univ Innsbruck, Assoc EURATOM OEAW, Inst Theoret Phys, A-6020 Innsbruck, Austria

[10] JET EFDA Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2008年 / 50卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1088/0741-3335/50/6/065008

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The effect of a toroidal field (TF) ripple on the formation and performance of internal transport barriers (ITBs) has been studied in JET. It was found that the TF ripple had a profound effect on the toroidal plasma rotation. An increased TF ripple up to delta = 1% led to a lower rotation and reduced the rotational shear in the region where the ITBs were formed. ITB triggering events were observed in all cases and it is thought that the rotational shear may be less important for this process than, for example, the q-profile. However, the increase in the pressure gradient following the ITB trigger was reduced in discharges with a larger TF ripple and consequently a lower rotational shear. This suggests that toroidal rotation and its shear play a role in the growth of the ITB once it has been triggered.

引用

页数：12

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