Observation of multi-scale turbulence and non-local transport in LHD plasmas

T. Tokuzawa, Inagaki Shigeru, K. Ida, K. Itoh, T. Ido, A. Shimizu, H. Takahashi, S. Kitajima, N. Tamura, M. Yoshinuma, H. Tsuchiya, I. Yamada, K. Tanaka, T. Akiyama, Y. Nagayama, K. Kawahata, K. Y. Watanabe, H. Yamada

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We have studied two types of spatio-temporal turbulence dynamics in plasmas in the Large Helical Device, based on turbulence measurements with high spatial and temporal resolution. Applying conditional ensemble-averaging to a plasma with Edge-Localized Modes (ELMs), fast radial inward propagation of a micro-scale turbulence front is observed just after ELM event, and the propagation speed is evaluated as ∼ 100m/s. A self-organized radial electric field structure is observed in an electrode biasing experiment, and it is found to realize a multi-valued state. The curvature of the radial electric field is found to play an important role for turbulence reduction.

Original languageEnglish
Article number055904
JournalPhysics of Plasmas
Volume21
Issue number5
DOIs
Publication statusPublished - Jan 1 2014

Fingerprint

turbulence
propagation
electric fields
temporal resolution
spatial resolution
curvature
electrodes
high resolution

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Tokuzawa, T., Shigeru, I., Ida, K., Itoh, K., Ido, T., Shimizu, A., ... Yamada, H. (2014). Observation of multi-scale turbulence and non-local transport in LHD plasmas. Physics of Plasmas, 21(5), [055904]. https://doi.org/10.1063/1.4876619

Observation of multi-scale turbulence and non-local transport in LHD plasmas. / Tokuzawa, T.; Shigeru, Inagaki; Ida, K.; Itoh, K.; Ido, T.; Shimizu, A.; Takahashi, H.; Kitajima, S.; Tamura, N.; Yoshinuma, M.; Tsuchiya, H.; Yamada, I.; Tanaka, K.; Akiyama, T.; Nagayama, Y.; Kawahata, K.; Watanabe, K. Y.; Yamada, H.

In: Physics of Plasmas, Vol. 21, No. 5, 055904, 01.01.2014.

Research output: Contribution to journalArticle

Tokuzawa, T, Shigeru, I, Ida, K, Itoh, K, Ido, T, Shimizu, A, Takahashi, H, Kitajima, S, Tamura, N, Yoshinuma, M, Tsuchiya, H, Yamada, I, Tanaka, K, Akiyama, T, Nagayama, Y, Kawahata, K, Watanabe, KY & Yamada, H 2014, 'Observation of multi-scale turbulence and non-local transport in LHD plasmas', Physics of Plasmas, vol. 21, no. 5, 055904. https://doi.org/10.1063/1.4876619
Tokuzawa, T. ; Shigeru, Inagaki ; Ida, K. ; Itoh, K. ; Ido, T. ; Shimizu, A. ; Takahashi, H. ; Kitajima, S. ; Tamura, N. ; Yoshinuma, M. ; Tsuchiya, H. ; Yamada, I. ; Tanaka, K. ; Akiyama, T. ; Nagayama, Y. ; Kawahata, K. ; Watanabe, K. Y. ; Yamada, H. / Observation of multi-scale turbulence and non-local transport in LHD plasmas. In: Physics of Plasmas. 2014 ; Vol. 21, No. 5.
@article{3dad368596d140739457d395ec74a314,
title = "Observation of multi-scale turbulence and non-local transport in LHD plasmas",
abstract = "We have studied two types of spatio-temporal turbulence dynamics in plasmas in the Large Helical Device, based on turbulence measurements with high spatial and temporal resolution. Applying conditional ensemble-averaging to a plasma with Edge-Localized Modes (ELMs), fast radial inward propagation of a micro-scale turbulence front is observed just after ELM event, and the propagation speed is evaluated as ∼ 100m/s. A self-organized radial electric field structure is observed in an electrode biasing experiment, and it is found to realize a multi-valued state. The curvature of the radial electric field is found to play an important role for turbulence reduction.",
author = "T. Tokuzawa and Inagaki Shigeru and K. Ida and K. Itoh and T. Ido and A. Shimizu and H. Takahashi and S. Kitajima and N. Tamura and M. Yoshinuma and H. Tsuchiya and I. Yamada and K. Tanaka and T. Akiyama and Y. Nagayama and K. Kawahata and Watanabe, {K. Y.} and H. Yamada",
year = "2014",
month = "1",
day = "1",
doi = "10.1063/1.4876619",
language = "English",
volume = "21",
journal = "Physics of Plasmas",
issn = "1070-664X",
publisher = "American Institute of Physics Publising LLC",
number = "5",

}

TY - JOUR

T1 - Observation of multi-scale turbulence and non-local transport in LHD plasmas

AU - Tokuzawa, T.

AU - Shigeru, Inagaki

AU - Ida, K.

AU - Itoh, K.

AU - Ido, T.

AU - Shimizu, A.

AU - Takahashi, H.

AU - Kitajima, S.

AU - Tamura, N.

AU - Yoshinuma, M.

AU - Tsuchiya, H.

AU - Yamada, I.

AU - Tanaka, K.

AU - Akiyama, T.

AU - Nagayama, Y.

AU - Kawahata, K.

AU - Watanabe, K. Y.

AU - Yamada, H.

PY - 2014/1/1

Y1 - 2014/1/1

N2 - We have studied two types of spatio-temporal turbulence dynamics in plasmas in the Large Helical Device, based on turbulence measurements with high spatial and temporal resolution. Applying conditional ensemble-averaging to a plasma with Edge-Localized Modes (ELMs), fast radial inward propagation of a micro-scale turbulence front is observed just after ELM event, and the propagation speed is evaluated as ∼ 100m/s. A self-organized radial electric field structure is observed in an electrode biasing experiment, and it is found to realize a multi-valued state. The curvature of the radial electric field is found to play an important role for turbulence reduction.

AB - We have studied two types of spatio-temporal turbulence dynamics in plasmas in the Large Helical Device, based on turbulence measurements with high spatial and temporal resolution. Applying conditional ensemble-averaging to a plasma with Edge-Localized Modes (ELMs), fast radial inward propagation of a micro-scale turbulence front is observed just after ELM event, and the propagation speed is evaluated as ∼ 100m/s. A self-organized radial electric field structure is observed in an electrode biasing experiment, and it is found to realize a multi-valued state. The curvature of the radial electric field is found to play an important role for turbulence reduction.

UR - http://www.scopus.com/inward/record.url?scp=84900790078&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84900790078&partnerID=8YFLogxK

U2 - 10.1063/1.4876619

DO - 10.1063/1.4876619

M3 - Article

VL - 21

JO - Physics of Plasmas

JF - Physics of Plasmas

SN - 1070-664X

IS - 5

M1 - 055904

ER -