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. 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 fluct...
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| Format: | Article |
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American Institute of Physics (AIP)
2018
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| Online Access: | http://hdl.handle.net/1721.1/117094 https://orcid.org/0000-0003-2951-9749 https://orcid.org/0000-0001-8029-3525 |
| _version_ | 1811095346573475840 |
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| author | Zhu, Z. Carter, T. A. White, Anne E. Baek, Seung Gyou Terry, James L |
| author2 | Massachusetts Institute of Technology. Plasma Science and Fusion Center |
| author_facet | Massachusetts Institute of Technology. Plasma Science and Fusion Center Zhu, Z. Carter, T. A. White, Anne E. Baek, Seung Gyou Terry, James L |
| author_sort | Zhu, Z. |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T16:15:38Z |
| format | Article |
| id | mit-1721.1/117094 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T16:15:38Z |
| publishDate | 2018 |
| publisher | American Institute of Physics (AIP) |
| record_format | dspace |
| spelling | mit-1721.1/1170942022-10-02T07:21:27Z Chaotic edge density fluctuations in the Alcator C-Mod tokamak Zhu, Z. Carter, T. A. White, Anne E. Baek, Seung Gyou Terry, James L Massachusetts Institute of Technology. Plasma Science and Fusion Center White, Anne E. Baek, Seung Gyou Terry, James L 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. United States. Department of Energy (Grant DE-FC02-99ER54512) United States. Department of Energy (Grant DE-FC02-07ER54918-011) 2018-07-24T18:49:53Z 2018-07-24T18:49:53Z 2017-04 2016-12 2018-07-20T14:44:01Z Article http://purl.org/eprint/type/JournalArticle 1070-664X 1089-7674 http://hdl.handle.net/1721.1/117094 Zhu, Z. et al. “Chaotic Edge Density Fluctuations in the Alcator C-Mod Tokamak.” Physics of Plasmas 24, 4 (April 2017): 042301 © 2017 Author(s) https://orcid.org/0000-0003-2951-9749 https://orcid.org/0000-0001-8029-3525 http://dx.doi.org/10.1063/1.4978784 Physics of Plasmas Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf American Institute of Physics (AIP) arXiv |
| spellingShingle | Zhu, Z. Carter, T. A. White, Anne E. Baek, Seung Gyou Terry, James L Chaotic edge density fluctuations in the Alcator C-Mod tokamak |
| title | Chaotic edge density fluctuations in the Alcator C-Mod tokamak |
| title_full | Chaotic edge density fluctuations in the Alcator C-Mod tokamak |
| title_fullStr | Chaotic edge density fluctuations in the Alcator C-Mod tokamak |
| title_full_unstemmed | Chaotic edge density fluctuations in the Alcator C-Mod tokamak |
| title_short | Chaotic edge density fluctuations in the Alcator C-Mod tokamak |
| title_sort | chaotic edge density fluctuations in the alcator c mod tokamak |
| url | http://hdl.handle.net/1721.1/117094 https://orcid.org/0000-0003-2951-9749 https://orcid.org/0000-0001-8029-3525 |
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