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A quasi-steady-state lower-hybrid current-drive operation is demonstrated in the Alcator C tokamak at densities up to -nₑ1×10¹⁴ cm^-3. The current-drive efficiency is measured experimentally over a wide range of densities and magnetic fields. The radial distribution of high-energy x rays indicates that the current-carrying electrons peak near the plasma axis.
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Porkoláb et al. (1984) studied this question.
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