Application of wavelet spectral analysis to plasma fluctuation measurements using beam emission spectroscopy

被引：13

作者：

Jakubowski, M ^{[1
]}

Fonck, R ^{[1
]}

Kim, JS ^{[1
]}

McKee, G ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1999年 / 70卷 / 01期

关键词：

D O I：

10.1063/1.1149407

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Beam emission spectroscopy (BES) measures localized density fluctuations in fusion plasma turbulence. A wavelet transform method of spectral analysis is applied to BES data to extract fluctuations without the long time-averaging characteristic of Fourier transform spectral analysis methods. This technique is used to observe an abrupt (similar to 100 mu s) L-H transition on DIII-D. Wavelet-based cross correlation analysis can be used to obtain fluctuations of poloidal rotation velocity, and suggests opportunity for measurement of electrostatic potential fluctuation measurements. (C) 1999 American Institute of Physics. [S0034-6748(99)64901-2].

引用

页码：874 / 877

页数：4

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