Numerical calculations of the ion thermal conductivity in helical toroidal (torsatron) magnetic configurations show the presence of a plateau regime extending over two orders of magnitude in collision frequency, ν. The value of the ion thermal conductivity is approximately equal to the neoclassical plateau value for an equivalent torus without helical modulation. The predicted adverse 1ν behavior due to ripple trapping is not seen.
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Potok et al. (1980) studied this question.
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