该研究分析了Swarthmore Spheromak实验中磁扰动频率谱，发现其表现出宽频带和早期的Kolmogorov 5/3尺度定律。在频谱陡峭区域，揭示了类似流体和磁流体动力学湍流中的能量耗散现象。通过应用非谱系时间序列分析技术，如平坦度、排列熵和统计复杂性，发现在频谱陡峭尺度上存在特定模式，这些结果与频谱行为相比较，进一步揭示了湍流耗散的特征。
摘要：
The frequency spectrum of magnetic fluctuations as measured on the Swarthmore Spheromak Experiment is broadband and exhibits a nearly Kolmogorov 5/3 scaling. It features a steepening region which is indicative of dissipation of magnetic fluctuation energy similar to that observed in fluid and magnetohydrodynamic turbulence systems. Two non-spectrum based time-series analysis techniques are implemented on this data set in order to seek other possible signatures of turbulent dissipation beyond just the steepening of fluctuation spectra. Presented here are results for the flatness, permutation entropy, and statistical complexity, each of which exhibits a particular character at spectral steepening scales which can then be compared to the behavior of the frequency spectrum.
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