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.
Chen, Z. Y., Wan, B. N., Shi, Y. J., Lin, S. Y., Hu, L. Q., & Asif, M. (2005). Investigation of the LH wave energy conversion and current drive efficiency in the HT-7 tokamak. Physics Letters, Section A: General, Atomic and Solid State Physics, 344(1), 51–56. https://doi.org/10.1016/j.physleta.2005.06.046