Chaotic edge density fluctuations in the Alcator C-Mod tokamak

Zhu, Z.; White, A. E.; Carter, T. A.; Baek, S. G.; Terry, J. L.

doi:10.7910/DVN/HCNVAV

Title: Chaotic edge density fluctuations in the Alcator C-Mod tokamak

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.

Authors:: Zhu, Z.; White, A. E.; Carter, T. A.; Baek, S. G.; Terry, J. L.

Publication Date:: 2018-10-05

DOE Contract Number:: FC02-99ER54512; FC02-07ER54918

Research Org.:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center; Univ. of California, Los Angeles, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

OSTI Identifier:: 1878760

DOI:: https://doi.org/10.7910/DVN/HCNVAV

Citation Formats


                    Zhu, Z., White, A. E., Carter, T. A., Baek, S. G., and Terry, J. L. Chaotic edge density fluctuations in the Alcator C-Mod tokamak.  United States: N. p., 2018. 
        Web.  doi:10.7910/DVN/HCNVAV.

Copy to clipboard


                    Zhu, Z., White, A. E., Carter, T. A., Baek, S. G., & Terry, J. L. Chaotic edge density fluctuations in the Alcator C-Mod tokamak.  United States.  doi:https://doi.org/10.7910/DVN/HCNVAV

Copy to clipboard


                    Zhu, Z., White, A. E., Carter, T. A., Baek, S. G., and Terry, J. L. 2018.  
"Chaotic edge density fluctuations in the Alcator C-Mod tokamak".  United States.  doi:https://doi.org/10.7910/DVN/HCNVAV.  https://www.osti.gov/servlets/purl/1878760. Pub date:Fri Oct 05 00:00:00 EDT 2018

Copy to clipboard


                    
@article{osti_1878760,

  title        = {Chaotic edge density fluctuations in the Alcator C-Mod tokamak},

  author       = {Zhu, Z. and White, A. E. and Carter, T. A. and Baek, S. G. and Terry, J. L.},

  abstractNote = {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.},

  doi          = {10.7910/DVN/HCNVAV},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {2018},

  month        = {10}

}

Copy to clipboard

Dataset:

View Dataset

DOI: https://doi.org/10.7910/DVN/HCNVAV

Save / Share:

Export Metadata

Save to My Library

Works referencing / citing this record: