Permutation entropy analysis of temperature fluctuations from a basic electron heat transport experiment

Author： Maggs J E   Morales G J  

Publisher： IOP Publishing

ISSN： 0741-3335

Source： Plasma Physics and Controlled Fusion, Vol.55, Iss.8, 2013-08, pp. : 85015-85021

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Abstract

The permutation entropy concept of Bandt and Pompe (2002 Phys. Rev. Lett. 88 174102) is used to analyze the fluctuations in ion saturation current that spontaneously arise in a basic experimental study (Pace et al 2008 Phys. Plasmas 15 122304) of electron heat transport in a magnetized plasma. From the behavior of the Shannon entropy and the Jensen–Shannon complexity it is found that the underlying dynamics are chaotic rather than stochastic. A partitioning and scrambling technique is used to demonstrate that the exponential character of the associated power spectrum arises from individual Lorentzian pulses observed in the time series.

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