Evolution of the radial electric field in a JET H-mode plasma

被引：25
|
作者：
Andrew, Y. [1 ,2 ]
Hawkes, N. C. [1 ,2 ]
Biewer, T. [1 ,3 ]
Crombe, K. [1 ,4 ]
Keeling, D. [1 ,2 ]
De La Luna, E. [1 ,5 ]
Giroud, C. [1 ,2 ]
Korotkov, A. [1 ,2 ]
Meigs, A. [1 ,2 ]
Murari, A. [1 ,6 ]
Nunes, I. [1 ,7 ]
Sartori, R. [1 ,8 ]
Tala, T. [1 ,9 ]
机构：
[1] Culham Sci Ctr, JET EFDA, Abingdon OX14 3DB, Oxon, England
[2] Culham Sci Ctr, UKAEA Euratom Fus Assoc, Abingdon OX14 3DB, Oxon, England
[3] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
[4] Univ Ghent, Dept Appl Phys, Ghent, Belgium
[5] CIEMAT, Asocias EURATOM Fus, E-28040 Madrid, Spain
[6] EURATOM, ENEA, Consorzio RFX, Padua, Italy
[7] Ctr Fusao Nucl, Associacao EURATOM IST, Lisbon, Portugal
[8] EFDA CSU, D-85748 Garching, Germany
[9] Assoc EURATOM Tekes, FIN-02044 Espoo, Finland
来源：
EPL | 2008年 / 83卷 / 01期
基金：
英国工程与自然科学研究理事会;
关键词：
D O I：
10.1209/0295-5075/83/15003
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Results from recent measurements of carbon impurity ion toroidal and poloidal rotation velocities, ion temperature, ion density and the resulting radial electric field (Er) profiles are presented from an evolving Joint European Torus (JET) tokamak plasma over a range of energy and particle confinement regimes. Significant levels of edge plasma poloidal rotation velocity have been measured for the first time on JET, with maximum values of +/- 9 kms(-1). Such values of poloidal rotation provide an important contribution to the total edge plasma Er profiles. Large values of shear in the measured Er profiles are observed to arise as a consequence of the presence of the edge transport barrier (ETB) and do not appear to be necessary for their formation or destruction. These results have an important impact on potential mechanisms for transport barrier triggering and sustainment in present-day and future high-performance fusion plasmas. Copyright (c) EPLA, 2008.
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页数：6
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