[Table of Contents]

Plasma and Fusion Research

Volume 5, 033 (2010)

Rapid Communications

Correlation between Low-Frequency Fluctuations and Plasma Stored Energy in GAMMA 10
Yoshiaki MIYATA, Masayuki YOSHIKAWA, Fumiaki YAGUCHI, Makoto ICHIMURA, Tatsuya MURAKAMI and Tsuyoshi IMAI
Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
(Received 14 July 2010 / Accepted 23 July 2010 / Published 27 August 2010)

Abstract

The instabilities observed in many magnetic confinement devices induce radial particle transport. Density and potential fluctuations were measured using a gold neutral beam probe in GAMMA 10. The plasma stored energy repeatedly increases and decreases during ion- cyclotron range of frequency heating. A drift-type fluctuation was observed in both the density and the potential as the plasma stored energy decreased. These results indicated a correlation between the radial particle transport induced by drift-type fluctuations and decreasing plasma stored energy.

Keywords

gold neutral beam probe, drift-type fluctuation, potential fluctuation, density fluctuation, radial particle transport

DOI: 10.1585/pfr.5.033

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References

  • [1] B. Fischer et al., Plasma Phys. Control. Fusion 31, 453 (1989).
  • [2] H.W. Hendel et al., Phys. Rev. Lett. 18, 439 (1967).
  • [3] H.W. Hendel et al., Phys. Fluids 11, 2426 (1968).
  • [4] W. Horton, Rev. Mod. Phys. 71, 735 (1999).
  • [5] Y. Miyata et al., Trans. Fusion. Tech. 55, 168 (2009).
  • [6] Y. Miyata et al., J. Plasma Fusion Res. 2, S1101 (2007).
  • [7] Y. Miyata et al., Rev. Sci. Instrum. 79, 10F308 (2008).
  • [8] A. Kojima et al., Fusion Sci. Tech. 51, 2T, 274 (2007).

This paper may be cited as follows:

Yoshiaki MIYATA, Masayuki YOSHIKAWA, Fumiaki YAGUCHI, Makoto ICHIMURA, Tatsuya MURAKAMI and Tsuyoshi IMAI, Plasma Fusion Res. 5, 033 (2010).