Direct Evaluation of Spatio-Temporal Change in Current Density Profile Applied to a Discharge with Neo-Classical Tearing Mode
Direct Evaluation of Spatio-Temporal Change in Current Density Profile Applied to a Discharge with Neo-Classical Tearing Mode
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新古典撕裂模式放电中电流密度分布时空变化的直接评估
DOI：
10.1585/jspf.80.362
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
T. Fujita
中科院分区：
文献类型：
--
作者：
Takahiro Suzuki;T. Oikawa;A. Isayama;T. Fujita
将一种直接由运动斯塔克效应(MSE)诊断电流密度分布时空变化的分析方法应用于出现新经典撕裂模(NTM)并被电子回旋电流驱动(ECCD)稳定的放电。分析清楚地显示了磁岛位置的电流密度在空间上的局域性降低，这意味着由于岛内压力分布的平坦而导致自举电流的减小。在ECCD应用开始后，当NTM稳定时，观察到岛状位置的电流密度增加。
An analytical method to evaluate spatio-temporal change in the current density profile directly from the motional Stark effect (MSE) diagnostic is applied to a discharge, where a neo-classical tearing mode (NTM) appeared and was stabilized by electron cyclotron current drive (ECCD). The analysis clearly shows a spatially localized decrease in current density at the magnetic island location, implying a decrease in bootstrap current due to a flattening of the pressure profile within the island. When the NTM is stabilized after the start of the ECCD application, an increase in current density at the island location is observed.