Year: 2017
Type: article
Abstract: Analysis of the time series obtained with the O-Mode reflectometer [Rhodes et al., 1997 Plasma Phys. Controlled Fusion 40, 493–510 (1998)] and the gas puff imaging [Cziegler et al., Phys. Plasmas 17(5), 056120 (2010)] systems on the Alcator C-Mod tokamak reveals that the turbulent edge density fluctuations are chaotic. Supporting evidence for this conclusion includes the observation of exponential power spectra (which is associated with Lorentzian-shaped pulses in the time series), the population of the corresponding Bandt-Pompe probability distributions [Bandt and Pompe, Phys. Rev. Lett. 88, 174102 (2002)], and the location of the signal on the complexity-entropy plane (C-H plane) [Rosso et al., Phys. Rev. Lett. 99, 154102 (2007)]. The classification of edge turbulence as chaotic opens the door for further work to understand the underlying process and the impact on turbulent transport.
Source: Physics of Plasmas
DOI: 10.1063/1.4978784
Authors: Z. Zhu, A. E. White, T. A. Carter, S. G. Baek, J. L. Terry
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Awards: TAS::89 0227::TAS RECOVERY ACT - BASIC PLASMA SCIENCE FACILITY UPGRADE, BASIC PLASMA SCIENCE FACILITY UPGRADE, TAS::89 0227::TAS RECOVERY ACT - BASIC PLASMA SCIENCE FACILITY UPGRADE, ALCATOR C-MOD FUSION RESEARCH PROGRAM, ALCATOR C-MOD FUSION RESEARCH PROGRAM, TAS::89 0227: :TAS RECOVERY ACT ALCATOR C-MOD FUSION RESEARCH PROGRAM, TAS::89 0227: :TAS RECOVERY ACT ALCATOR C-MOD FUSION RESEARCH PROGRAM, G7196957139, BASIC PLASMA SCIENCE FACILITY UPGRADE
OpenAlex ID: W2566709871