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 Sudo; Hiroshi Yamada; Akio Komori

doi:10.1585/pfr.6.1402017

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 journal › Article › peer-review

9 Citations (Scopus)

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 language	English
Article number	1402017
Journal	Plasma and Fusion Research
Volume	6
Issue number	2011
DOIs	https://doi.org/10.1585/pfr.6.1402017
Publication status	Published - 2011

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1585/pfr.6.1402017

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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., ... Komori, A. (2011). Long range temperature fluctuation in LHD. Plasma and Fusion Research, 6(2011), [1402017]. https://doi.org/10.1585/pfr.6.1402017

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

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title = "Long range temperature fluctuation in LHD",

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.",

author = "Inagaki Shigeru and Tokihiko Tokuzawa and Kimitaka Itoh and Katsumi Ida and Sanae Itoh and Naoki Tamura and Satoru Sakakibara and Naohiro Kasuya and Akihide Fujisawa and Shin Kubo and Takashi Shimozuma and Takeshi Ido and Seiya Nishimura and Hiroyuki Arakawa and Tatsuya Kobayashi and Masatoshi Yagi and Kenji Tanaka and Yoshio Nagayama and Kazuo Kawahata and Shigeru Sudo and Hiroshi Yamada and Akio Komori",

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doi = "10.1585/pfr.6.1402017",

language = "English",

volume = "6",

journal = "Plasma and Fusion Research",

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T1 - Long range temperature fluctuation in LHD

AU - Shigeru, Inagaki

AU - Tokuzawa, Tokihiko

AU - Itoh, Kimitaka

AU - Ida, Katsumi

AU - Itoh, Sanae

AU - Tamura, Naoki

AU - Sakakibara, Satoru

AU - Kasuya, Naohiro

AU - Fujisawa, Akihide

AU - Kubo, Shin

AU - Shimozuma, Takashi

AU - Ido, Takeshi

AU - Nishimura, Seiya

AU - Arakawa, Hiroyuki

AU - Kobayashi, Tatsuya

AU - Yagi, Masatoshi

AU - Tanaka, Kenji

AU - Nagayama, Yoshio

AU - Kawahata, Kazuo

AU - Sudo, Shigeru

AU - Yamada, Hiroshi

AU - Komori, Akio

PY - 2011

Y1 - 2011

N2 - 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.

AB - 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.

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DO - 10.1585/pfr.6.1402017

M3 - Article

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SN - 1880-6821

VL - 6

JO - Plasma and Fusion Research

JF - Plasma and Fusion Research

IS - 2011

M1 - 1402017

ER -

Long range temperature fluctuation in LHD

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