Singular spectrum analysis as a tool for plasma fluctuations analysis

被引:16
作者
Marrelli, L
Bilato, R
Franz, P
Martin, P
Murari, A
O'Gorman, M
机构
[1] EURATOM, ENEA Fus, Consorzio RFX, I-35127 Padua, Italy
[2] Ist Nazl Fis Mat, UdR, Padua, Italy
[3] Max Planck Inst Plasma Phys, EURATOM, IPP Ass, D-85748 Garching, Germany
关键词
D O I
10.1063/1.1323250
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
We describe the application of the singular spectrum analysis (SSA), an advanced adaptive statistical technique, to denoise experimental signals and to remove trends in order to isolate the relevant fluctuating components. We illustrate a fast denoising algorithm and show its performances relatively to synthetic and experimental signals of the soft x-ray (SXR) spectrometer and the polarimeter installed in the reversed field experiment (RFX) device. As a further application, we report a first estimate of the electron temperature fluctuations in the core of the RFX experiment. They have been performed with a multifilter SXR spectrometer and applying SSA for the first time in plasma physics the singular spectrum analysis. We find that temperature fluctuations are typically not larger than a few percent and are well correlated with magnetic fluctuations. (C) 2001 American Institute of Physics.
引用
收藏
页码:499 / 502
页数:4
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