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Continuous wavelet transform analysis for self-similarity properties of turbulence in magnetized DC glow discharge plasma

Published online by Cambridge University Press:  14 June 2013

BORNALI SARMA
Affiliation:
Department of Physics, VIT University, Vandalur-Kelambakkam Road, Chennai, 600 048, Tamilnadu, India ([email protected])
SOURABH S. CHAUHAN
Affiliation:
Department of Physics, National Institute of Science Education and Research, IOP Campus, Bhubaneswar 751005, Orissa, India
A. M. WHARTON
Affiliation:
Plasma Physics Division, Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, Kolkata 700 064, West Bengal, India
A. N. SEKAR IYENGAR
Affiliation:
Plasma Physics Division, Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, Kolkata 700 064, West Bengal, India

Abstract

Characterization of self-similarity properties of turbulence in magnetized plasma is being carried out in DC glow discharge plasma. The time series floating potential fluctuation experimental data are acquired from the plasma by Langmuir probe. Continuous wavelet transform (CWT) analysis considering db4 mother wavelet has been applied to the experimental data and self-similarity properties are detected by evaluating the Hurst exponent from the wavelet variance plotting. From the CWT spectrum, effort is made to extract a highly correlated frequency by locating the brightest spot. Accordingly, those signals are treated for finding out correlation dimension and the Liapunov exponent so that the exact frequency responsible for the chaotic behavior could be found out.

Type
Papers
Copyright
Copyright © Cambridge University Press 2013 

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