Effect of q-profile modification by LHCD on internal transport barriers in JET

被引：107

作者：

Challis, CD ^{[1
]}

Baranov, YF

Conway, GD

Gormezano, C

Gowers, CW

Hawkes, NC

Hender, TC

Joffrin, E

Mailloux, J

Mazon, D

Podda, S

Prentice, R

Rimini, FG

Sharapov, SE

Sips, ACC

Stratton, BC

Testa, D

Zastrow, KD

机构：

[1] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

[2] EURATOM, IPP, Max Planck Inst Plasmaphys, D-85740 Garching, Germany

[3] ENEA Fus, Ctr Ric Energia, EURATOM Assoc, I-00044 Frascati, Rome, Italy

[4] CEN Cadarache, EURATOM Assoc, CEA Fus, F-13108 St Paul Les Durance, France

[5] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

[6] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2001年 / 43卷 / 07期

关键词：

D O I：

10.1088/0741-3335/43/7/303

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：

Optimized shear (OS) experiments in JET can generate an internal transport barrier (ITB) during a high power heating phase early in the plasma discharge. A strong link is generally observed between the formation of the barrier and the location of an integer q magnetic surface within a low magnetic shear (s = r/q(dq/dr)) region of the plasma. However, if the q-profile for such experiments is modified by applying lower hybrid heating and current drive (LHCD) before the main heating pulse, to provide a region of reduced or negative magnetic shear in the plasma core, ITBs can be formed the location of which does not exhibit any apparent association with a particular internal magnetic surface. Initial results suggest that q-profile modification using an LHCD prelude can also be used to reduce the heating power level required for ITB generation.

引用

页码：861 / 879

页数：19

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