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

页码：988 / 991

页数：4

共 9 条

[1]

AUBRY N, 1991, J STAT PHYS, V64, P693

[2] CHARACTERIZATION OF COHERENT STRUCTURES IN TOKAMAK EDGE TURBULENCE [J].