Measurement of magnetic island width in long-pulse, high- discharges in JT-60U
Measurement of magnetic island width in long-pulse, high- discharges in JT-60U
复制标题
DOI：
10.1088/0741-3335/41/1/003
复制
发表时间：
1999
影响因子：
2.2
通讯作者：
A. Isayama;Y. Kamada;T. Ozeki;N. Isei
中科院分区：
文献类型：
--
作者：
A. Isayama;Y. Kamada;T. Ozeki;N. Isei
利用外差辐射计测量电子回旋辐射的振荡，研究了长脉冲强放电过程中磁岛的宽度。由于其约2厘米的高空间分辨率，可以详细测量磁岛结构的演变。岛的宽度随着磁场波动的幅度而增加。当m/n = 3/2模式出现时，饱和岛宽约为7 cm。限制可持续性的电阻模式具有m/n = 3/2和2/1的典型模式数。讨论了观测到的磁岛与新经典撕裂模的关系。
The magnetic island width during long-pulse, high- 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 m/n = 3/2 mode appeared. The resistive modes which limit the sustainable have typical mode numbers of m/n = 3/2 and 2/1. The relationship between the observed magnetic island and the neoclassical tearing mode is discussed.