[Table of Contents]

Plasma and Fusion Research

Volume 2, 048 (2007)

Regular Articles

Density Fluctuation Measurement for Studying the Effect of Potential and Electric Field Formation in GAMMA 10
Masayuki YOSHIKAWA, Toshiaki MATSUMOTO, Yoriko SHIMA, Yoshiaki MIYATA, Hideto KAKIUCHI, Masanori MIZUGUCHI, Makoto ICHIMURA, Tsuyoshi IMAI, Akiyosi ITAKURA, Isao KATANUMA, Junko KOHAGURA, Yoshinori TATEMATSU, Yousuke NAKASHIMA, Tomoharu NUMAKURA, Mafumi HIRATA, Hitoshi HOJO, Yuusuke KUBOTA, Ryutaro MINAMI, Takayuki KOBAYASHI, Yuusuke YAMAGUCHI, Hiroshi SAIMARU, Yuta HIGASHIZONO, Teruji CHO and GAMMA 10 Group
Plasma Research Center, University of Tsukuba
(Received 4 December 2006 / Accepted 5 October 2007 / Published 19 November 2007)

Abstract

Advances in potential formation have led to remarkable discoveries on the effects of radial electric field distribution on turbulence suppression and transverse loss reduction. In order to study the improvement in plasma confinement because of the formation of plasma confinement potential, we constructed a multi-channel microwave interferometer system that can measure the density and density fluctuation radial profiles in a single plasma shot. We obtained clear density fluctuation suppression by the formation of the plasma confinement potential. Therefore, we have a powerful diagnostic tool with which to study the improvement in plasma confinement.

Keywords

tandem mirror GAMMA 10, potential and electric field, Er shear, multi-channel microwave interferometer

DOI: 10.1585/pfr.2.048

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References

  • [1] T. Cho et al., Phys. Rev. Lett. 86, 4310 (2001).
  • [2] T. Cho et al., Phys. Rev. Lett. 94, 085002 (2005).
  • [3] T. Cho et al., Nucl. Fusion 45, 1650 (2005).
  • [4] T. Cho et al., 21th IAEA Fusion Energy Conf. (Chengdu, 2006) IAEA/EX/P7-14.
  • [5] R.F. Post, Nucl. Fusion 27, 1579 (1987).
  • [6] A. Mase et al., Phys. Rev. Lett. 64, 2281 (1990).
  • [7] M.B. Chaudhry et al., J. Phys. Soc. Jpn. 57, 3043 (1988).
  • [8] M. Kwon et al., Trans. Fusion Sci. Tech. 43, 23 (2003).
  • [9] M. Yoshikawa et al., Rev. Sci. Instrum. 77, 10E906 (2006).
  • [10] M. Yoshikawa et al., Trans. Fusion Technol. 35, 273 (1999).
  • [11] M. Yoshikawa et al., Surface Rev. Lett. 9, 555 (2002).
  • [12] M. Yoshikawa et al., Trans. Fusion Sci. Tech. 43, 189 (2003).
  • [13] M. Yoshikawa et al., J. Korean Phys. Soc. 49, S113 (2006).
  • [14] K. Ishii et al., Rev. Sci. Instrum. 60, 3270 (1989).
  • [15] M. Yoshida et al., Rev. Sci. Instrum. 74, 1909 (2003).
  • [16] T. Cho et al., Phys. Rev. A 45, 2532 (1992).

This paper may be cited as follows:

Masayuki YOSHIKAWA, Toshiaki MATSUMOTO, Yoriko SHIMA, Yoshiaki MIYATA, Hideto KAKIUCHI, Masanori MIZUGUCHI, Makoto ICHIMURA, Tsuyoshi IMAI, Akiyosi ITAKURA, Isao KATANUMA, Junko KOHAGURA, Yoshinori TATEMATSU, Yousuke NAKASHIMA, Tomoharu NUMAKURA, Mafumi HIRATA, Hitoshi HOJO, Yuusuke KUBOTA, Ryutaro MINAMI, Takayuki KOBAYASHI, Yuusuke YAMAGUCHI, Hiroshi SAIMARU, Yuta HIGASHIZONO, Teruji CHO and GAMMA 10 Group, Plasma Fusion Res. 2, 048 (2007).