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

Inagaki Shigeru; T. Tokuzawa; N. Tamura; Sanae Itoh; T. Kobayashi; K. Ida; T. Shimozuma; S. Kubo; K. Tanaka; T. Ido; A. Shimizu; H. Tsuchiya; N. Kasuya; Y. Nagayama; K. Kawahata; S. Sudo; H. Yamada; A. Fujisawa; K. Itoh

doi:10.1088/0029-5515/53/11/113006

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

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

Division of Nuclear Fusion Dynamics

Research output: Contribution to journal › Article › peer-review

57 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 language	English
Article number	113006
Journal	Nuclear Fusion
Volume	53
Issue number	11
DOIs	https://doi.org/10.1088/0029-5515/53/11/113006
Publication status	Published - Nov 2013

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

Access to Document

10.1088/0029-5515/53/11/113006

Cite this

Shigeru, I., Tokuzawa, T., Tamura, N., Itoh, S., 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, 53(11), [113006]. https://doi.org/10.1088/0029-5515/53/11/113006

Shigeru, I, Tokuzawa, T, Tamura, N, Itoh, S, 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

@article{2e433863bb3d46959c80e7f0a4b65616,

title = "How is turbulence intensity determined by macroscopic variables in a toroidal plasma?",

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.",

author = "Inagaki Shigeru and T. Tokuzawa and N. Tamura and Sanae Itoh and T. Kobayashi and K. Ida and T. Shimozuma and S. Kubo and K. Tanaka and T. Ido and A. Shimizu and H. Tsuchiya and N. Kasuya and Y. Nagayama and K. Kawahata and S. Sudo and H. Yamada and A. Fujisawa and K. Itoh",

year = "2013",

month = nov,

doi = "10.1088/0029-5515/53/11/113006",

language = "English",

volume = "53",

journal = "Nuclear Fusion",

issn = "0029-5515",