[Table of Contents]

Plasma and Fusion Research

Volume 7, 1201025 (2012)

Rapid Communications


Observations of Intermittent Structures in the Periphery of a Cylindrical Linear Plasma in PANTA
Noriko OHYAMA, Akihide FUJISAWA1,2), Shigeru INAGAKI1,2), Yoshihiko NAGASHIMA1,2), Stella OLDENBÜRGER2), Tatsuya KOBAYASHI, Katsuyuki KAWASHIMA, Yuuki TOBIMATSU, Tetsuo YAMASHITA, Soutaro YAMADA, Hiroyuki ARAKAWA3), Takuma YAMADA2,4), Masatoshi YAGI2,5), Naohiro KASUYA2,6), Makoto SASAKI1,2), Sanae-I. ITOH1,2) and Kimitaka ITOH2,6)
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
1)
Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
2)
Itoh Research Center for Plasma Turbulence, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
3)
Japan Atomic Energy Agency, 801-1 Mukoyama, Naka, Ibaraki 311-0193, Japan
4)
Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Tokyo 277-8561, Japan
5)
Japan Atomic Energy Agency, 2-166 Oaza-obuchi-aza-omotedate, Rokkasho, Kamikita, Aomori 039-3212, Japan
6)
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan
(Received 6 February 2012 / Accepted 16 February 2012 / Published 15 April 2012)

Abstract

Intermittent pulse events have been observed in the periphery of the linear cylindrical plasmas produced in Plasma Assembly for Nonlinear Turbulence Analysis (PANTA). A novel combination of 32 azimuthal and 3 radial probes enables us to obtain 32 × 3 = 96 pairs of correlations simultaneously. The two-dimensional (2D) correlation analysis shows that the intermittent structure is well correlated with quasi-periodic bursts inside the plasma, and it reveals that the intermittent pulse is caused by the passage of a radially elongated and azimuthally distorted localized structure rotating in the ion diamagnetic direction.


Keywords

two-dimensional correlation, multichannel probe, PANTA, intermittent structure

DOI: 10.1585/pfr.7.1201025


References

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This paper may be cited as follows:

Noriko OHYAMA, Akihide FUJISAWA, Shigeru INAGAKI, Yoshihiko NAGASHIMA, Stella OLDENBÜRGER, Tatsuya KOBAYASHI, Katsuyuki KAWASHIMA, Yuuki TOBIMATSU, Tetsuo YAMASHITA, Soutaro YAMADA, Hiroyuki ARAKAWA, Takuma YAMADA, Masatoshi YAGI, Naohiro KASUYA, Makoto SASAKI, Sanae-I. ITOH and Kimitaka ITOH, Plasma Fusion Res. 7, 1201025 (2012).