Improved lower hybrid current drive efficiency with IBW heating in the HT-7 tokamak

  • Chen Z
  • Wan B
  • Shi Y
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Lower hybrid current drive (LHCD) efficiency in the HT-7 tokamak is observed to increase about 30% with ion Bernstein wave (IBW) heating. The current drive efficiency as high as 0.48 × 1019A m-2W-1has been reached in HT-7 thanks to an LHCD/IBW synergy. The IBWs are significantly coupled to the fast electrons produced by the lower hybrid waves, thus results in higher fast electron photon temperature in the combined LHCD + IBW scenario. The interaction of LHCD + IBW improved current drive efficiency. © 2007 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Current drive efficiency
  • IBW
  • LHCD
  • Synergy

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  • Z. Y. Chen

  • B. N. Wan

  • Y. J. Shi

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