JET internal transport barriers: experiment vs theory

被引：11
|
作者：
Esposito, B
Crisanti, F
Parail, V
Maget, P
Baranov, Y
Becoulet, A
Castaldo, C
Challis, CD
De Angelis, R
Garbet, X
Giroud, C
Hawkes, N
Joffrin, E
Litaudon, X
Mazon, D
Riva, M
Zastrow, KD
机构：
[1] EURATOM, ENEA Sulla Fus, CR Frascati, I-00040 Rome, Italy
[2] UKAEA Euratom Fus Assoc, Cuhlam Sci Ctr, Abingdon OX14 3DB, Oxon, England
[3] CEA, EURATOM Assoc, F-13108 St Paul Les Durance, France
来源：
PLASMA PHYSICS AND CONTROLLED FUSION | 2003年 / 45卷 / 06期
关键词：
D O I：
10.1088/0741-3335/45/6/307
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：
A large variety of JET discharges with internal transport barriers (ITBs) has been analysed in order to determine the main features which characterize turbulence stabilization at the barrier. It is found that the location of barriers is well correlated with regions where the E x B flow shearing rate exceeds the linear growth rate of the ion temperature gradient mode instability (gamma(etai)). A key point is the dependence of gamma(etai) on the magnetic shear: in the discharges of this database the reduction of gamma(etai) associated to very low or null magnetic shear favours the formation of an ITB. After the ITB formation a positive feedback occurs in which the E x B flow shear mechanism has the leading role and the position of the barrier may be no longer linked to the low shear region.
引用
收藏
页码：933 / 947
页数：15
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