Long range temperature fluctuation in LHD

Inagaki Shigeru, Tokihiko Tokuzawa, Kimitaka Itoh, Katsumi Ida, Sanae Itoh, Naoki Tamura, Satoru Sakakibara, Naohiro Kasuya, akihide fujisawa, Shin Kubo, Takashi Shimozuma, Takeshi Ido, Seiya Nishimura, Hiroyuki Arakawa, Tatsuya Kobayashi, Masatoshi Yagi, Kenji Tanaka, Yoshio Nagayama, Kazuo Kawahata, Shigeru SudoHiroshi Yamada, Akio Komori

Research output: Contribution to journalArticle

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Abstract

We report a detailed correlation technique to identify the long-range temperature fluctuation in the Large Helical Device. Correlation hunting has successfully realized the observation of electron temperature fluctuations, which are characterized by their correlation length comparable to the plasma minor radius, with low frequency of ~ 1-3kHz, ballistic radial propagation (at a speed of ~1km/s, of the order of diamagnetic drift velocity), spatial mode number of m/n = 1/1 (or 2/1), and amplitude of ~2% at the maximum. Bicoherence analysis confirmed their nonlinear coupling with local microscopic turbulent fluctuations. This long-range temperature fluctuation is a possible carrier of fast propagation in transport processes observed so far. We also comment on the theoretical interpretation.

Original languageEnglish
Article number1402017
JournalPlasma and Fusion Research
Volume6
Issue number2011
DOIs
Publication statusPublished - Dec 1 2011

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temperature
propagation
ballistics
electron energy
low frequencies
radii

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Shigeru, I., Tokuzawa, T., Itoh, K., Ida, K., Itoh, S., Tamura, N., ... Komori, A. (2011). Long range temperature fluctuation in LHD. Plasma and Fusion Research, 6(2011), [1402017]. https://doi.org/10.1585/pfr.6.1402017

Long range temperature fluctuation in LHD. / Shigeru, Inagaki; Tokuzawa, Tokihiko; Itoh, Kimitaka; Ida, Katsumi; Itoh, Sanae; Tamura, Naoki; Sakakibara, Satoru; Kasuya, Naohiro; fujisawa, akihide; Kubo, Shin; Shimozuma, Takashi; Ido, Takeshi; Nishimura, Seiya; Arakawa, Hiroyuki; Kobayashi, Tatsuya; Yagi, Masatoshi; Tanaka, Kenji; Nagayama, Yoshio; Kawahata, Kazuo; Sudo, Shigeru; Yamada, Hiroshi; Komori, Akio.

In: Plasma and Fusion Research, Vol. 6, No. 2011, 1402017, 01.12.2011.

Research output: Contribution to journalArticle

Shigeru, I, Tokuzawa, T, Itoh, K, Ida, K, Itoh, S, Tamura, N, Sakakibara, S, Kasuya, N, fujisawa, A, Kubo, S, Shimozuma, T, Ido, T, Nishimura, S, Arakawa, H, Kobayashi, T, Yagi, M, Tanaka, K, Nagayama, Y, Kawahata, K, Sudo, S, Yamada, H & Komori, A 2011, 'Long range temperature fluctuation in LHD', Plasma and Fusion Research, vol. 6, no. 2011, 1402017. https://doi.org/10.1585/pfr.6.1402017
Shigeru I, Tokuzawa T, Itoh K, Ida K, Itoh S, Tamura N et al. Long range temperature fluctuation in LHD. Plasma and Fusion Research. 2011 Dec 1;6(2011). 1402017. https://doi.org/10.1585/pfr.6.1402017
Shigeru, Inagaki ; Tokuzawa, Tokihiko ; Itoh, Kimitaka ; Ida, Katsumi ; Itoh, Sanae ; Tamura, Naoki ; Sakakibara, Satoru ; Kasuya, Naohiro ; fujisawa, akihide ; Kubo, Shin ; Shimozuma, Takashi ; Ido, Takeshi ; Nishimura, Seiya ; Arakawa, Hiroyuki ; Kobayashi, Tatsuya ; Yagi, Masatoshi ; Tanaka, Kenji ; Nagayama, Yoshio ; Kawahata, Kazuo ; Sudo, Shigeru ; Yamada, Hiroshi ; Komori, Akio. / Long range temperature fluctuation in LHD. In: Plasma and Fusion Research. 2011 ; Vol. 6, No. 2011.
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AU - Tamura, Naoki

AU - Sakakibara, Satoru

AU - Kasuya, Naohiro

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AU - Shimozuma, Takashi

AU - Ido, Takeshi

AU - Nishimura, Seiya

AU - Arakawa, Hiroyuki

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AU - Tanaka, Kenji

AU - Nagayama, Yoshio

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AU - Sudo, Shigeru

AU - Yamada, Hiroshi

AU - Komori, Akio

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