Plasma Current Start-up by ECW and Vertical Field in the TST-2 Spherical Tokamak

  • MITARAI Osamu
    Institute of Industrial Science and Technical Research, Kyushu Tokai University
  • TAKASE Yuichi
    Grad. School of Frontier Sciences and Grad. School of Science, Univ. Tokyo
  • EJIRI Akira
    Grad. School of Frontier Sciences and Grad. School of Science, Univ. Tokyo
  • SHIRAIWA Syunichi
    Grad. School of Frontier Sciences and Grad. School of Science, Univ. Tokyo
  • KASAHARA Hiroshi
    Grad. School of Frontier Sciences and Grad. School of Science, Univ. Tokyo
  • YAMADA Takuma
    Grad. School of Frontier Sciences and Grad. School of Science, Univ. Tokyo
  • OHARA Shinya
    Grad. School of Frontier Sciences and Grad. School of Science, Univ. Tokyo
  • TST-2 Team
    Grad. School of Frontier Sciences and Grad. School of Science, Univ. Tokyo
  • NAKAMURA Kazuo
    Research Institute for Applied Mechanics, Kyushu University
  • IYOMASA Atsuhiro
    Research Institute for Applied Mechanics, Kyushu University
  • HASEGAWA Makoto
    Research Institute for Applied Mechanics, Kyushu University
  • IDEI Hiroshi
    Research Institute for Applied Mechanics, Kyushu University
  • SAKAMOTO Mizuki
    Research Institute for Applied Mechanics, Kyushu University
  • HANADA Kazuaki
    Research Institute for Applied Mechanics, Kyushu University
  • SATOH Kohnosuke
    Research Institute for Applied Mechanics, Kyushu University
  • ZUSHI Hideki
    Research Institute for Applied Mechanics, Kyushu University
  • TRIAM Group
    Research Institute for Applied Mechanics, Kyushu University
  • NISHINO Nobuhiro
    Department of Engineering, Hiroshima Univ.

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Description

Plasma current start-up and ramp-up to 10 kA have been demonstrated in the TST-2 spherical tokamak without the use of the central solenoid. Only the electron cyclotron wave (ECW) and the outer equilibrium field coils are used. The plasma current evolution depends on the poloidal coil arrangement. It is also demonstrated that the plasma current start-up can take place without the field null.

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