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Two-dimensional wave-number spectral analysis techniques for phase contrast imaging turbulence imaging data on large helical device

Michael, Clive; Tanaka, K; VYACHESLAVOV, Leonid; SANIN, Andrei; KAWAHATA, Kazuo

Description

An analysis method for unfolding the spatially resolved wave-number spectrum and phase velocity from the 2D CO2 laser phase contrast imaging system on the large helical device is described. This is based on the magnetic shear technique which identifies propagation direction from 2D spatial Fourier analysis of images detected by a 6 × 8 detector array. Because the strongest modes have wave-number at the lower end of the instrumental k range, high resolution spectral techniques are necessary to...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
URI: http://hdl.handle.net/1885/98798
Source: Review of Scientific Instruments
DOI: 10.1063/1.4928668

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