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Streamer Structures in Experiment and Modeling

Takuma YAMADA^1,2), Makoto SASAKI^2,3), Naohiro KASUYA^2,3), Yoshihiko NAGASHIMA^2,3), Shigeru INAGAKI^2,3), Tatsuya KOBAYASHI^2,4), Masatoshi YAGI^2,5), Akihide FUJISAWA^2,3), Sanae-I. ITOH^2,3) and Kimitaka ITOH^2,6)

1)

Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan

2)

Itoh Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan

3)

Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan

4)

Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 816-8580, Japan

5)

Japan Atomic Energy Agency, Naka 311-0193, Japan

6)

National Institute for Fusion Science, Toki 509-5292, Japan

(Received 7 December 2012 / Accepted 18 February 2013 / Published 23 April 2013)

Abstract

Validation of modeling in meso-scale structure formation is undergoing by using multi-channel probe measurements and advanced analyzing techniques such as bispectrum. Study of meso-scale structures including streamers is important for understanding anomalous transports in magnetized plasmas. A streamer structure and its mediator mode were observed in the Large Mirror Device-Upgrade linear plasma. The mediator mode nonlinearly coupled with many other drift wave modes and generated a streamer structure by phase locking. The radial biphase profiles indicating the phase locking showed the radial elongation of the streamer structure. Modes having similar characteristics to the mediator were also found in a theoretical work based on the Hasegawa-Mima model and a numerical simulation code.

Copyright (c) 2013 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

linear plasma, turbulence, nonlinear coupling, streamer, bispectrum, validation of modeling

DOI: 10.1585/pfr.8.2401022

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References

• [1] P.H. Diamond, S.-I. Itoh, K. Itoh and T.S. Hahm, Plasma Phys. Control. Fusion 47, R35 (2005).
• [2] V.I. Petviashvili, Sov. J. Plasma Phys. 3, 150 (1977).
• [3] K. Nozaki, T. Taniuti and K. Watanabe, J. Phys. Soc. Jpn. 46, 991 (1979).
• [4] J.F. Drake, A. Zeiler and D. Biskamp, Phys. Rev. Lett. 75, 4222 (1995).
• [5] S. Champeaux and P.H. Diamond, Phys. Lett. A 288, 214 (2001).
• [6] N. Kasuya et al., J. Phys. Soc. Jpn. 76, 044501 (2007).
• [7] N. Kasuya, M. Yagi, K. Itoh and S.-I. Itoh, Phys. Plasmas 15, 052302 (2008).
• [8] A. Fujisawa et al., Phys. Rev. Lett. 93, 165002 (2004).
• [9] G.R. Tynan et al., Plasma Phys. Control. Fusion 48, S51 (2006).
• [10] C. Holland et al., Phys. Rev. Lett. 96, 195002 (2006).
• [11] C. Hidalgo et al., Plasma Phys. Control. Fusion 48, S169 (2006).
• [12] A. Fujisawa, Nucl. Fusion 49, 013001 (2009).
• [13] P.A. Politzer, Phys. Rev. Lett. 84, 1192 (2000).
• [14] Y. Hamada et al., Phys. Rev. Lett. 96, 115003 (2006).
• [15] T. Yamada et al., Nature Phys. 4, 721 (2008).
• [16] N. Kasuya, S. Nishimura, M. Yagi, K. Itoh and S.-I. Itoh, Plasma Sci. Tech. 13, 326 (2011).
• [17] T. Yamada et al., Phys. Rev. Lett. 105, 225002 (2010).
• [18] T. Yamada et al., Rev. Sci. Instrum. 78, 123501 (2007).

This paper may be cited as follows:

Takuma YAMADA, Makoto SASAKI, Naohiro KASUYA, Yoshihiko NAGASHIMA, Shigeru INAGAKI, Tatsuya KOBAYASHI, Masatoshi YAGI, Akihide FUJISAWA, Sanae-I. ITOH and Kimitaka ITOH, Plasma Fusion Res. 8, 2401022 (2013).