Brandt Christian, Grulke Olaf, Klinger Thomas, Negrete José, Bousselin Guillaume, Brochard Frédéric, Bonhomme Gérard, Oldenbürger Stella
Max-Planck-Institut für Plasmaphysik, Greifswald, Germany.
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Nov;84(5 Pt 2):056405. doi: 10.1103/PhysRevE.84.056405. Epub 2011 Nov 11.
This paper presents full cross-section measurements of drift waves in the linear magnetized plasma of the Mirabelle device. Drift wave modes are studied in regimes of weakly developed turbulence. The drift wave modes develop azimuthal space-time structures of plasma density, plasma potential, and visible light fluctuations. A fast camera diagnostic is used to record visible light fluctuations of the plasma column in an azimuthal cross section with a temporal resolution of 10 μs corresponding approximately to 10% of the typical drift wave period. Mode coupling and drift wave dispersion are studied by spatiotemporal Fourier decomposition of the camera frames. The observed coupling between modes is compared to calculations of nonlinearly coupled oscillators described by the Kuramoto model.
本文展示了在米拉贝尔装置的线性磁化等离子体中对漂移波的全截面测量结果。在弱湍流发展的区域研究了漂移波模式。漂移波模式呈现出等离子体密度、等离子体电势和可见光波动的方位时空结构。使用快速相机诊断技术，以10微秒的时间分辨率记录等离子体柱方位截面的可见光波动，该时间分辨率约为典型漂移波周期的10%。通过对相机帧进行时空傅里叶分解来研究模式耦合和漂移波色散。将观察到的模式之间的耦合与由Kuramoto模型描述的非线性耦合振荡器的计算结果进行比较。
