Influence of neoclassical tearing modes on energy confinement
Influence of neoclassical tearing modes on energy confinement
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DOI：
10.1088/0741-3335/41/6/306
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发表时间：
1999-06
影响因子：
2.2
通讯作者：
S. Günter;A. Gude;M. Maraschek;Q. Yu
中科院分区：
文献类型：
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作者：
S. Günter;A. Gude;M. Maraschek;Q. Yu
在ASDEX Upgrade上研究了新经典撕裂模式对（3,2）模式的约束退化。除了通过磁岛的热传递增加外，模式开始后等离子体密度的降低导致约束进一步恶化。与标准标度定律预测相比，大压力下的相对能量损失在25%左右达到饱和。将实验结果与考虑磁岛引起的热输运增加的新古典岛的非线性生长的数值模拟进行了比较。除密度减小的影响外，观测结果与模拟结果吻合较好。
The degradation in confinement due to neoclassical tearing modes has been investigated for the (3,2) mode at ASDEX Upgrade. Besides the increased heat transport across the magnetic island, a decreased plasma density after the onset of the mode leads to a further deterioration in confinement. The relative energy loss compared to the prediction of standard scaling law saturates for large pressures at around 25%. The experimental results have been compared with numerical simulations of the nonlinear growth of neoclassical islands accounting for the increased heat transport induced by the magnetic islands. Except for the effect of the density decrease, good agreement between the observations and the simulation results is found.