Plasma and Fusion Research

Volume 12, 1201008 (2017)

Rapid Communications

Coexistence of Drift Waves and D'Angelo Modes at Different Position and Frequency in Linear Plasma Device
Nathan DUPERTUIS1), Shigeru INAGAKI2,3), Yoshihiko NAGASHIMA2,3), Yusuke KOSUGA2,3), Fumiyoshi KIN5), Tatsuya KOBAYASHI4), Naohiro KASUYA2,3), Makoto SASAKI2,3), Akihide FUJISAWA2,3), Minh Quang TRAN1), Sanae-I. ITOH2,3) and Kimitaka ITOH3,4)
1)
Swiss Plasma Center, École Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland
2)
Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
3)
Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
4)
National Institute for Fusion Science, Toki 509-5292, Japan
5)
Interdisciplinary Graduate School of Engineering Science, Kyushu University, Kasuga 816-8580, Japan
(Received 23 September 2016 / Accepted 28 December 2016 / Published 8 March 2017)

Abstract

Experimental plasma discharges in linear PANTA device are studied by Mach probe measurements, providing floating potential, ion saturation current, and parallel flow velocity time evolution, at different radii of the device. Spectral analysis indicates that drift waves and D'Angelo modes exist simultaneously in the plasma. A discrimination study shows they are located at different positions in radius and frequency.

Keywords

drift wave, D'Angelo mode, coexistence, linear plasma device

DOI: 10.1585/pfr.12.1201008

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References

  • [1] B.B. Kadomtsev, Plasma Turbulence (Academic, New York, 1965).
  • [2] H. Hasegawa et al., Nature 430, 755 (2004).
  • [3] T. Kaneko, H. Tsunoyama and R. Hatakeyama, Phys. Rev. Lett. 90, 125001 (2003).
  • [4] S. Inagaki et al., Sci. Rep. 6, 22189 (2016).
  • [5] N. D'Angelo, Phys. Fluids 8, 1748 (1965).
  • [6] Y. Kosuga, S.-I. Itoh and K. Itoh, Plasma Fusion Res. 10, 3401024 (2015).
  • [7] W.E. Amatucci, J. Geophys. Res. 104, 14481 (1999).
  • [8] M. Sasaki et al., Japanese Physical Society Autumn Meeting 2016, 15pKA10.
  • [9] T. Yamada et al., Nature Phys. 4, 721 (2008).
  • [10] S. Oldenbürger et al., Plasma Fusion Res. 7, 2401146 (2012).