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Geodesic acoustic mode investigation in the spherical Globus-M tokamak using multi-diagnostic approach

机译:使用多诊断方法研究球形Globus-M托卡马克中的测地声模

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摘要

The results of a multi-diagnostic approach for geodesic acoustic mode (GAM) studies in the spherical torus Globus-M are presented. The GAM oscillations of radial electric field, plasma density and magnetic field were simultaneously observed. The spatial structures of crucial plasma parameters are exhibited and discussed. The intermittent character of the GAM manifests itself as a modulation at two time-scales: equilibrium time scale and the characteristic time for limit-cycle oscillations. The mutual influence of GAM oscillations and turbulence is demonstrated by bicoherence analysis.
机译:提出了球形环面Globus-M中测地声模(GAM)研究的多诊断方法的结果。同时观察了径向电场,等离子体密度和磁场的GAM振荡。关键等离子体参数的空间结构得以展示和讨论。 GAM的间歇性表现为在两个时间尺度上的调制:平衡时间尺度和极限循环振荡的特征时间。双相干分析表明了GAM振荡和湍流的相互影响。

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