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Author Jha, R. ♦ Saxena, Y. C.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION ♦ ADITYA TOKAMAK ♦ TURBULENCE ♦ GAUSSIAN PROCESSES ♦ INTEGRAL TRANSFORMATIONS ♦ PLASMA SCRAPE-OFF LAYER ♦ LIMITERS ♦ PLASMA SIMULATION
Abstract The edge turbulence in the ADITYA tokamak [Phys. Rev. Lett. {bold 69}, 1375 (1992)] is examined using wavelet analysis techniques. The wavelet filters are used to separate low and high frequency components. The filtered plasma density and floating potential fluctuations show leptokurtic non-Gaussianity (kurtosis, {ital K}{approx_gt}3) at high frequencies, whereas, the low frequency components are nearly Gaussian. The recently developed wavelet bicoherence technique [Phys. Plasmas {bold 2}, 3017 (1995)] is extended to the Mexican hat wavelet. When the data are examined using wavelet bicoherence technique, it is found that the turbulent density and potential signals exhibit {ital episodes} of quadratic interaction in which low and high frequency components are coupled. {copyright} {ital 1996 American Institute of Physics.}
ISSN 1070664X
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-08-01
Publisher Place United States
Journal Physics of Plasmas
Volume Number 3
Issue Number 8


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