How is turbulence intensity determined by macroscopic variables in a toroidal plasma?

Inagaki Shigeru, T. Tokuzawa, N. Tamura, S. I. Itoh, T. Kobayashi, K. Ida, T. Shimozuma, S. Kubo, K. Tanaka, T. Ido, A. Shimizu, H. Tsuchiya, Naohiro Kasuya, Y. Nagayama, K. Kawahata, S. Sudo, H. Yamada, akihide fujisawa, K. Itoh

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We report observations of the dynamic response of micro-fluctuations and turbulent flux to a low-frequency heating power modulation in the Large Helical Device. The responses of heat flux and micro-fluctuation intensity differ from that of the change in temperature gradient. This result violates the local transport model, where turbulence is determined by the local temperature gradient. A new relationship between flux, gradient and turbulence is found. In addition to the temperature gradient, the heating rate is proposed as a new, direct controlling parameter of turbulence to explain the fast response of turbulence against periodic modulation of heating power.

Original languageEnglish
Article number113006
JournalNuclear Fusion
Volume53
Issue number11
DOIs
Publication statusPublished - Nov 1 2013

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toroidal plasmas
temperature gradients
turbulence
heating
modulation
turbulence models
dynamic response
heat flux
low frequencies
gradients

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

Shigeru, I., Tokuzawa, T., Tamura, N., Itoh, S. I., Kobayashi, T., Ida, K., ... Itoh, K. (2013). How is turbulence intensity determined by macroscopic variables in a toroidal plasma? Nuclear Fusion, 53(11), [113006]. https://doi.org/10.1088/0029-5515/53/11/113006

How is turbulence intensity determined by macroscopic variables in a toroidal plasma? / Shigeru, Inagaki; Tokuzawa, T.; Tamura, N.; Itoh, S. I.; Kobayashi, T.; Ida, K.; Shimozuma, T.; Kubo, S.; Tanaka, K.; Ido, T.; Shimizu, A.; Tsuchiya, H.; Kasuya, Naohiro; Nagayama, Y.; Kawahata, K.; Sudo, S.; Yamada, H.; fujisawa, akihide; Itoh, K.

In: Nuclear Fusion, Vol. 53, No. 11, 113006, 01.11.2013.

Research output: Contribution to journalArticle

Shigeru, I, Tokuzawa, T, Tamura, N, Itoh, SI, Kobayashi, T, Ida, K, Shimozuma, T, Kubo, S, Tanaka, K, Ido, T, Shimizu, A, Tsuchiya, H, Kasuya, N, Nagayama, Y, Kawahata, K, Sudo, S, Yamada, H, fujisawa, A & Itoh, K 2013, 'How is turbulence intensity determined by macroscopic variables in a toroidal plasma?', Nuclear Fusion, vol. 53, no. 11, 113006. https://doi.org/10.1088/0029-5515/53/11/113006
Shigeru, Inagaki ; Tokuzawa, T. ; Tamura, N. ; Itoh, S. I. ; Kobayashi, T. ; Ida, K. ; Shimozuma, T. ; Kubo, S. ; Tanaka, K. ; Ido, T. ; Shimizu, A. ; Tsuchiya, H. ; Kasuya, Naohiro ; Nagayama, Y. ; Kawahata, K. ; Sudo, S. ; Yamada, H. ; fujisawa, akihide ; Itoh, K. / How is turbulence intensity determined by macroscopic variables in a toroidal plasma?. In: Nuclear Fusion. 2013 ; Vol. 53, No. 11.
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