Improved conditional averaging technique for plasma fluctuation diagnostics
Improved conditional averaging technique for plasma fluctuation diagnostics
复制标题
改进的等离子体波动诊断条件平均技术
DOI：
10.1088/0741-3335/49/4/011
复制
发表时间：
2007
影响因子：
2.2
通讯作者：
F. Greiner
中科院分区：
文献类型：
--
作者：
I. Teliban;D. Block;A. Piel;F. Greiner
条件平均是湍流中大尺度结构检测的标准方法之一。综合数据和实验数据表明，通常的触发条件不足以获得可靠的结构幅值。我们的分析表明，振幅下降是由触发抖动和触发错误发生的有限概率引起的。使用基于互相关分析的改进条件平均方案，显示了消除这些误差并获得正确振幅的可能性。
Conditional averaging is one of the standard methods to detect large-scale structures in turbulent flows. By means of synthetic and experimental data it is shown that the usual trigger conditions are not sufficient to obtain reliable structure amplitudes. Our analysis shows that the amplitude reduction is caused by trigger jitter and a finite probability for trigger errors to occur. Using an improved conditional averaging scheme based upon a cross-correlation analysis, the possibility to remove these errors and to obtain correct amplitudes is shown.