First EMC3-Eirene simulations of the impact of the edge magnetic perturbations at ASDEX Upgrade compared with the experiment
First EMC3-Eirene simulations of the impact of the edge magnetic perturbations at ASDEX Upgrade compared with the experiment
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DOI：
10.1088/0029-5515/52/5/054013
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发表时间：
2012-05
期刊：
影响因子：
3.3
通讯作者：
T. Lunt;Y. Feng;M. Bernert;A. Herrmann;P. de Marne;R. McDermott;H. W. Müller;S. Potzel;
中科院分区：
文献类型：
--
作者：
T. Lunt;Y. Feng;M. Bernert;A. Herrmann;P. de Marne;R. McDermott;H. W. Müller;S. Potzel;
首次应用EMC3-Eirene程序包对ASDEX升级放电中的边缘等离子体进行了数值模拟，其中新安装的磁微扰(MP)线圈用于抑制边缘局域模式(ELM)。模拟了该放电过程中的两个不同时间点，即MP线圈接通后的ELM缓和阶段和作为参考的之前的Elmy H模式阶段。结果与各种边缘和偏滤器诊断的测量结果进行了比较。假设主室轮廓相对于其校准位置移动15 mm，则在分隔线外的主腔轮廓与外偏滤器靶处的主腔体轮廓之间存在2倍的一致性。最重要的结果是在粒子通量中观察到了几个极大值和极小值，特别是在MPS情况下的模拟和实验的功率沉积模式中，这种效应也被称为撞击点分裂。
The EMC3-Eirene code package was applied for the first time to simulate the edge plasma in an ASDEX Upgrade discharge, in which the newly installed magnetic perturbation (MP) coils were used to mitigate edge-localized modes (ELMs). Two different points in time during this discharge were simulated, the ELM-mitigated phase after turning-on of the MP coils and, as a reference, the ELMy H-mode phase before. The results were compared with the measurements of various edge and divertor diagnostics. Assuming the main chamber profiles to be shifted by 15 mm with respect to their calibrated positions, an agreement within a factor of 2 was found between the main chamber profiles outside the separatrix and those at the outer divertor target. The most important result is the observation of several maxima and minima in the particle flux and in particular in the power deposition pattern of both the simulation and the experiment for the case with MPs, an effect also known as strike-point splitting.