论文标题
外部应用3D场对NSTX边缘湍流的影响
The Effect of Externally Applied 3D Fields on NSTX Edge Turbulence
论文作者
论文摘要
我们报告了对NSTX H模式放电中边缘湍流的结构的研究，并使用n = 1和n = 3非轴对称磁扰动。使用气吹成像（GPI）系统在NSTX中诊断边缘湍流，以了解这些3D场如何影响边缘传输。提出的数据库研究使用了在GPI气体吹气过程中具有变化的放电的选择。我们比较了所应用的非轴对称场发生变化之前和之后的湍流，并比较了两种状态之间的湍流。我们的发现表明，这些3D场对平均螺栓大小，自相关时间或湍流相对波动水平没有强大的统计学上的显着影响。此外，我们发现GPI信号峰强度的径向位置的位移与3D真空磁场代码MAFOT预测的扰动分离式位置的位置相关。我们发现，从RWM线圈中的非轴对称磁场也可以按预期的局部移位，即使不包括自洽的血浆响应，并且该模型再现了GPI观察到的局部变化。
We report on a study of the structure of edge turbulence in NSTX H-mode discharges with applied n=1 and n=3 non-axisymmetric magnetic perturbations. The edge turbulence is diagnosed in NSTX using the gas puff imaging (GPI) system to understand how these 3D fields affect edge transport. The presented database study uses a selection of discharges that have a change in the RWM coil current during the GPI gas puff. We compare the turbulence before and after this change in the applied non-axisymmetric fields, and compares the turbulence between the two states. Our findings show that these 3D fields do not have a strong, statistically significant impact on the average poloidal size, autocorrelation time, or relative fluctuation levels of the turbulence. In addition, we find that the displacement of the radial location of the GPI signal peak intensity is correlated with the shift in the perturbed separatrix location as predicted by the 3D vacuum magnetic field code MAFOT. We find that in general the non-axisymmetric fields from the RWM coils locally displace the edge flux surface as expected even when the self-consistent plasma response is not included, and that the model reproduces the localized shift observed by GPI.
