2D turbulence imaging in DIII-D via beam emission spectroscopy

被引：21
|
作者：
Fenzi, C [1 ]
Fonck, RJ [1 ]
Jakubowski, M [1 ]
Mc Kee, GR [1 ]
机构：
[1] Univ Wisconsin, Madison, WI 53706 USA
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 2001年 / 72卷 / 01期
关键词：
D O I：
10.1063/1.1321739
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Two-dimensional measurements of density fluctuations have been performed in DIII-D using the beam emission spectroscopy diagnostic. The 32 spatial channels are arranged to image a 5 x 6 cm(2) (radialxpoloidal) region in the plasma cross section, at a nominal 1 cm spatial resolution and separation. The typical decorrelation time, poloidal and radial correlation lengths, as well as a time-averaged flow field plot are obtained from spatial and temporal correlation analyses. A biorthogonal decomposition algorithm is applied to expand the data set into a set of modes that are orthogonal in time and in space, thus providing a simultaneous analysis of the space and time dependencies of fluctuation data. (C) 2001 American Institute of Physics.
引用
收藏
页码：988 / 991
页数：4
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