Skewed Lorentzian pulses and exponential frequency power spectra
نویسندگان
چکیده
منابع مشابه
Exponential power spectra, deterministic chaos and Lorentzian pulses in plasma edge dynamics
Exponential spectra have been observed in the edges of tokamaks, stellarators, helical devices and linear machines. The observation of exponential power spectra is significant because such a spectral character has been closely associated with the phenomenon of deterministic chaos by the nonlinear dynamics community. The proximate cause of exponential power spectra in both magnetized plasma edge...
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Two different experiments involving pressure gradients across the confinement magnetic field in a large plasma column are found to exhibit a broadband turbulence that displays an exponential frequency spectrum for frequencies below the ion cyclotron frequency. The exponential feature has been traced to the presence of solitary pulses having a Lorentzian temporal signature. These pulses arise fr...
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An experimental investigation of the low-frequency density fluctuations in the plasma edge region of the TJ-K stellarator [N. Krause et al., Rev. Sci. Inst. 73, 3474 (2002)] finds that the ensembleaveraged frequency spectra exhibit a near exponential frequency dependence whose origin can be traced to individual pulses having a Lorentzian temporal shape. Similar features have been previously obs...
متن کاملGenerality of deterministic chaos, exponential spectra, and Lorentzian pulses in magnetically confined plasmas.
The dynamics of transport at the edge of magnetized plasmas is deterministic chaos. The connection is made by a previous survey [M. A. Pedrosa et al., Phys. Rev. Lett. 82, 3621 (1999)] of measurements of fluctuations that is shown to exhibit power spectra with exponential frequency dependence over a broad range, which is the signature of deterministic chaos. The exponential character arises fro...
متن کاملBayesian analysis of a skewed exponential power distribution
A Bayesian analysis of a skewed exponential power distribution has been performed. The skewed exponential power family includes the symmetric exponential power distribution as a particular case and provides flexible distributions with lighter and heavier tails compared to the normal one. The distributions of this family can successfully handle both symmetry/asymmetry and light/heavy tails simul...
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ژورنال
عنوان ژورنال: Physics of Plasmas
سال: 2018
ISSN: 1070-664X,1089-7674
DOI: 10.1063/1.5004811