Plasma equilibrium based on EC-driven current profile with toroidal rotation on QUEST

K. Nakamura, M. M. Alam, Y. Z. Jiang, O. Mitarai, M. Takechi, Makoto Hasegawa, K. Tokunaga, Kazuaki Hanada, Hiroshi Idei, Yoshihiko Nagashima, Takumi Onchi, K. Kuroda, O. Watanabe, A. Higashijima, T. Nagata, S. Shimabukuro, S. Kawasaki, A. Fukuyama

Research output: Contribution to journalArticle

Abstract

In the EC-driven (8.2 GHz) steady-state plasma on QUEST, plasma current seems to flow in the open magnetic surface in the outside of the closed magnetic surface in the low-field region according to plasma current fitting method without taking equilibrium into account. In our previous work, plasma equilibrium solution was fitted assuming all plasma current is flowing in the inside of the Last Closed Flux Surface (LCFS). It was solved within isotropic pressure profile by EFIT code. Opposite-polarity current density region appeared in the high-field region. Here in this article, considering the toroidal rotation, the equilibrium is fitted within nested magnetic surfaces by SU-EFIT. Though the plasma magnetic axis shifts outward due to the centrifugal force, the opposite polarity current does not disappear in the high-field region. And relation between the toroidal rotation speed and the poloidal beta value will be discussed.

Original languageEnglish
Pages (from-to)2628-2631
Number of pages4
JournalFusion Engineering and Design
Volume146
DOIs
Publication statusPublished - Sep 1 2019

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Plasmas
Current density
Fluxes

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

Cite this

Plasma equilibrium based on EC-driven current profile with toroidal rotation on QUEST. / Nakamura, K.; Alam, M. M.; Jiang, Y. Z.; Mitarai, O.; Takechi, M.; Hasegawa, Makoto; Tokunaga, K.; Hanada, Kazuaki; Idei, Hiroshi; Nagashima, Yoshihiko; Onchi, Takumi; Kuroda, K.; Watanabe, O.; Higashijima, A.; Nagata, T.; Shimabukuro, S.; Kawasaki, S.; Fukuyama, A.

In: Fusion Engineering and Design, Vol. 146, 01.09.2019, p. 2628-2631.

Research output: Contribution to journalArticle

Nakamura, K, Alam, MM, Jiang, YZ, Mitarai, O, Takechi, M, Hasegawa, M, Tokunaga, K, Hanada, K, Idei, H, Nagashima, Y, Onchi, T, Kuroda, K, Watanabe, O, Higashijima, A, Nagata, T, Shimabukuro, S, Kawasaki, S & Fukuyama, A 2019, 'Plasma equilibrium based on EC-driven current profile with toroidal rotation on QUEST', Fusion Engineering and Design, vol. 146, pp. 2628-2631. https://doi.org/10.1016/j.fusengdes.2019.04.059
Nakamura, K. ; Alam, M. M. ; Jiang, Y. Z. ; Mitarai, O. ; Takechi, M. ; Hasegawa, Makoto ; Tokunaga, K. ; Hanada, Kazuaki ; Idei, Hiroshi ; Nagashima, Yoshihiko ; Onchi, Takumi ; Kuroda, K. ; Watanabe, O. ; Higashijima, A. ; Nagata, T. ; Shimabukuro, S. ; Kawasaki, S. ; Fukuyama, A. / Plasma equilibrium based on EC-driven current profile with toroidal rotation on QUEST. In: Fusion Engineering and Design. 2019 ; Vol. 146. pp. 2628-2631.
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AU - Alam, M. M.

AU - Jiang, Y. Z.

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AU - Takechi, M.

AU - Hasegawa, Makoto

AU - Tokunaga, K.

AU - Hanada, Kazuaki

AU - Idei, Hiroshi

AU - Nagashima, Yoshihiko

AU - Onchi, Takumi

AU - Kuroda, K.

AU - Watanabe, O.

AU - Higashijima, A.

AU - Nagata, T.

AU - Shimabukuro, S.

AU - Kawasaki, S.

AU - Fukuyama, A.

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