Chaotic edge density fluctuations in the Alcator C-Mod tokamak

Analysis of the time series obtained with the O-Mode reflectometer (Rhodes et al 1997 Plasma Phys. and Control. Fusion 40 (1998) 493-510) and the gas puff imaging (Cziegler, I. et al 2010 Phys. of Plasmas 17, No. 5 (2010) 056120) systems on the Alcator C-Mod tokamak reveals that the turbulent edge d...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Zhu, Ziyan, White, Anne, Carter, Troy, Baek, Seung Gyou, Terry, Jim
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 22.04.2017
Subjects
Density
Physics - Plasma Physics
Plasmas
Power spectra
Time series
Tokamak devices
Turbulence
Variation
Online AccessGet full text

Cover

More Information
Summary:Analysis of the time series obtained with the O-Mode reflectometer (Rhodes et al 1997 Plasma Phys. and Control. Fusion 40 (1998) 493-510) and the gas puff imaging (Cziegler, I. et al 2010 Phys. of Plasmas 17, No. 5 (2010) 056120) 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 2002 Phys. Rev. Lett. 88 174102), and the location of the signal on the complexity-entropy plane (C-H plane) (Rosso et al 2007 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.
ISSN:2331-8422
DOI:10.48550/arxiv.1612.04046