Measurement of magnetic island width in long-pulse, high-βN discharges in JT-60U

被引：54
|
作者：
Isayama, A [1 ]
Kamada, Y [1 ]
Ozeki, T [1 ]
Isei, N [1 ]
机构：
[1] Japan Atom Energy Res Inst, Naka Fus Res Estab, Naka, Ibaraki 3110193, Japan
来源：
PLASMA PHYSICS AND CONTROLLED FUSION | 1999年 / 41卷 / 01期
关键词：
D O I：
10.1088/0741-3335/41/1/003
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 magnetic island width during long-pulse, high-BN discharges was evaluated by measuring oscillations of electron cyclotron emission using a heterodyne radiometer. Because of its high spatial resolution of about 2 cm, evolution of the magnetic island structure can be measured in detail. The island width increases with the amplitude of the magnetic fluctuations. The saturated island width was about 7 cm when the min = 3/2 mode appeared. The resistive modes which limit the sustainable BN have typical mode numbers of min = 3/2 and 2/1. The relationship between the observed magnetic island and the neoclassical tearing mode is discussed.
引用
收藏
页码：35 / 43
页数：9
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