Modelling plasma response to RMP fields in ASDEX Upgrade with varying edge safety factor and triangularity
Modelling plasma response to RMP fields in ASDEX Upgrade with varying edge safety factor and triangularity
复制标题
在 ASDEX Upgrade 中使用不同的边缘安全系数和三角形对等离子体对 RMP 场的响应进行建模
DOI：
10.1088/0029-5515/56/12/126007
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发表时间：
2016-09
期刊：
影响因子：
3.3
通讯作者：
Zhong, F.C.
中科院分区：
文献类型：
--
作者：
Kurzan, B.;Piovesan, P.;Willensdorfer, M.;Zhong, F.C.
使用MARS-F代码（Liu et al 2000 Phys. Plasmas 7 3681）执行环形计算，以便理解等离子体响应与在ASDEX升级中使用共振磁扰动场观察到的边缘局域模（ELM）的减轻之间的相关性。特别是，系统的边缘安全系数的数值扫描显示，等离子体边缘附近的响应径向磁场的共振极向谐波的振幅，以及X点附近的等离子体径向位移，可以作为良好的指标，用于预测的最佳环形定相之间的上下行的线圈在ASDEX升级。对于线圈配置的环形模式数n = 1-4的各种选择，最佳线圈定相与边缘安全系数q95大致线性地成比例。在ASDEX升级中，最佳线圈定相也被预测为随着等离子体形状的上三角形而变化。此外，等离子体响应的多重共振效应，与连续变化的q95，计算观察和研究。
Toroidal computations are performed using the MARS-F code (Liu et al 2000 Phys. Plasmas 7 3681), in order to understand correlations between the plasma response and the observed mitigation of the edge localized modes (ELM) using resonant magnetic perturbation fields in ASDEX Upgrade. In particular, systematic numerical scans of the edge safety factor reveal that the amplitude of the resonant poloidal harmonic of the response radial magnetic field near the plasma edge, as well as the plasma radial displacement near the X-point, can serve as good indicators for predicting the optimal toroidal phasing between the upper and lower rows of coils in ASDEX Upgrade. The optimal coil phasing scales roughly linearly with the edge safety factor q95, for various choices of the toroidal mode number n = 1–4 of the coil configuration. The optimal coil phasing is also predicted to vary with the upper triangularity of the plasma shape in ASDEX Upgrade. Furthermore, multiple resonance effects of the plasma response, with continuously varying q95, are computationally observed and investigated.
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影响因子：
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