A sequence of toroidally averaged stellarator equilibria with increasing values of β was studied by numerically following the time evolution. It was found that the β dependence of many different plasma parameters indicated that this sequence represented plasmas whose resistive stability properties first worsened and then improved with β signaling entry into the second stability region. A study of the radial dependence of the stability showed that the plasma was limited in the plasma interior by a mode with a large resistive ballooning component and toward the edge by a resistive interchange mode.
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Charlton et al. (1991) studied this question.
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