Investigation of the LH wave energy conversion and current drive efficiency in the HT-7 tokamak

  • Chen Z
  • Wan B
  • Shi Y
 et al. 
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Abstract

Lower hybrid current drive (LHCD) plasmas in the presence of DC electric filed have been investigated based on Karney-Fisch theory in the HT-7 tokamak. The relatively small scatter in the experimental data with various values of waveguide phasing and lower hybrid power, when plotted in the Karney-Fisch diagram, confirms that a reasonable theoretical interpretation is possible for the HT-7 data. The full non-inductively current drive efficiencies are obtained by fitting the experimental data to the theoretical curve. The efficiency strongly depends on the lower hybrid wave phase velocity. © 2005 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Current drive efficiency
  • LH wave
  • Tokamak

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Authors

  • Z. Y. Chen

  • B. N. Wan

  • Y. J. Shi

  • S. Y. Lin

  • L. Q. Hu

  • M. Asif

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