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Temporal separation of the density fluctuation signal measured by light scattering

机译：通过光散射测得的密度波动信号的时间分离

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On Tore Supra, the frequency spectra of the turbulent fluctuations often have two peaks centred on some positive and negative values. These two peaks correspond to a poloidal motion of the electrons in opposite directions. In this paper, a criterion is elaborated which allows us to distinguish, in time, the density fluctuations convected in the parallel direction from those in the antiparallel direction with respect to the analysing wavevector. Two signals are thus extracted out of one. The validity of our model is experimentally checked by comparing the auto-correlation coefficients and the frequency spectra computed for the whole and the separated signals. Consequently, the frequency spectrum is studied in detail as a function of the analysing wavenumber leading to an accurate determination of some plasma properties. [References: 14]
机译：在Tore Supra上，湍流波动的频谱通常具有两个集中在一些正值和负值上的峰。这两个峰对应于电子在相反方向上的向向运动。在本文中，详细阐述了一个标准，该标准允许我们及时将相对于分析波矢在平行方向上对流的密度波动与在反平行方向上对流的密度波动区分开。因此从一个信号中提取两个信号。通过比较自相关系数和为整个信号和分离的信号计算的频谱，通过实验检查了我们模型的有效性。因此，根据分析波数对频谱进行了详细研究，从而可以准确确定某些等离子体性能。 [参考：14]

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